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USER’S GUIDE
Parting and Grooving
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The parting and grooving concept
Parting and grooving is a turning category of its own with a wide range of machining applica-
tions requiring dedicated tools (which can, to some extent, be used for general turning). Tofully utilize the tools and get the best machining results there are some factors to consider.
This user’s guide helps you to choose the right tool and insert for each parting and grooving
operation and gives ideal cutting data start values. It also provides optimised programming
strategies and helps to avoid machining problems.
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Simple and smart recommendations or
parting and grooving operations ............... 2
The dierent systems and when to use
them ................................................................ 4
Parting .......................................................... 19Parting of bars ........................................... 20
Parting of tubes ......................................... 23
Grooving ...................................................... 27
Single cut grooving ................................... 28
Methods of turning grooves .................... 30
Circlip grooving ....................................... 35
Face grooving ............................................ 36
Undercutting ............................................. 39Internal grooving ...................................... 40
Profling ........................................................ 42
Hard part machining ................................ 44
Machining of aluminium and non ferrous
materials .................................................... 46
HRSA and titanium grooving ................. 47
Titanium alloys ......................................... 47
Small part machining
– sliding head machines ............................ 49
Tool holding systems .................................. 56
Grades ........................................................... 71
Cutting data recommendations ............... 74
Wear mechanism – Trouble shooting ...... 76
Tailor Made .................................................. 78
Inserts ........................................................ 78
Toolholders ............................................... 79
Special products........................................... 81
Contents
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Simple and smart recommendationsfor parting and grooving operationsMore in-depth information, including practical hints is shown under each chapter.
For cutting speed, see page 74.
CRGC2135
125 m/min0.12 mm/r
Parting
of bar
Geometry:Grade:Cutting speed:Feed:
More info: Page 20
CMGC1125
125 m/min0.12 mm/r
Parting
of tube
GMGC1125
150 m/min0.1 mm/r
Grooving
Page 27
Values for insert width 3 mm.
TMGC4025
150 m/min0.12/0.2*
Turning
Geometry:Grade:Cutting speed:Feed:
More info: Page 33
154.0GC1020
150 m/min0.08 mm/r
Circlip grooving
Page 35
ROGC1125
150 m/min0.07 mm/r
Undercutting
Page 39
*Radial feed 0.12, axial feed 0.2.
GMGC1125
125 m/min
0.07 mm/r
Internal grooving
Geometry:Grade:Cutting speed:
Feed:
More info: Page 40
TF GC4125
125 m/min
0.1/0.15*mm/r
Face
grooving
Page 36
RMGC1125
150 m/min
0.2 mm/r
Profiling
Page 42
Values for insert width 3 mm. *Radial feed 0.1, axial feed 0.15.
Page 23
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CoroCut 2 CoroCut 1 CoroCut3 Q-Cut 151.2 Q-Cut 151.3
Parting (Cut-off) Page 19
Grooving Page 27
Face grooving Page 36
Turning Page 33
Profiling Page 42
Undercutting Page 39
Circlip grooving Page 35
Medium Deep Shallow
Internalsmalldia
Deep
Internalsmalldia
The different systemsand when to use them
External
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= First choice = Second choice = Third choice
Deep parting ø ≤110 mm
Medium parting ø ≤40 mm
Shallow parting ø ≤12 mm
U-Lock 154.0
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Internal grooving – min. hole diameter
Face grooving – min. hole diameter
≥4,2 ≥10≥12
≥25
ø 6,2 ø 12 ø 24 ø 34
0,3 10 12 25
6,2-18 mm 14-30 mm 24-50 mm 40-500 mm
First cutdiameter
Min hole
diameter
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Groove milling – min. cutter diameter
ø39 mm
ø10 mm
Type 327 Type 328
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CoroCut 1- and 2-edge inserts
– the first choice system
Inserts
This system is based on a patented Rail and V-shaped design which, together with a long
insert, gives exceptional stability. These factors make it possible to run at higher cutting dataand to achieve better productivity than any other system on the market.
Insert
Holder
V-shape Rail-shape
The inserts are available in different insert seat sizes covering inset widths from 1.5 mm up
to 8 mm, having different corner radii.
The insert seat sizes (D–L) must correspond with the holder seat size.
Most of the inserts are 2-edged versions in order to give good economy. Note that the
maximum cutting depth, ar, for these inserts is limited, see the table.
If larger depth is needed, use the 1-edged solution which can cut as
deep as the blade will allow.
Insert seat size Insert width,
mm
from
Max. cutting
depth, ar, for
CoroCut 2
inserts, mm
D 1.5 12.9
E 2 19
F 2.5 18.9
G 3 18.8
H 4 23.7
J 5 23.6
K 6 23.5
L 8 28.4
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C = Cut-off i.e. PartingG = GroovingT = TurningR = Round insert i.e. ProfilingA = Aluminium machining
The first letter in the geometry name repre-
sents different application areas.
F = Finishing i.e. low feed areaM = Medium feed areaR = Roughing i.e. high feed areaO = Optimising i.e. for special areasS = Sharp edge, extremely low feed areaE = Edge rounded, for special cases
The second letter gives information about
feed area.
N123G2-0300-0002-CM
Code example:
Geometry designation
Geometries
A large variety of geometries are available, dedicated to different applications and feed areas.
Select the geometry after application and feed, see the table.
Parting
(Cut-off)
Grooving Turning Profiling
(Round)
Aluminium pro-
filing
Finishing CF GF TF
Medium CM GM TM RM AM
Roughing CR
Optimiser RO
Sharp CS RS
ER treated GE RE
CoroCut insert geometries
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CoroCut3 – for shallow partingIntended for economical shallow parting in mass production.
The triangular shaped 3-edged inserts are available in widths 1–2 mm. The insert seat with a
stable triangular shape allows cutting depths up to 6.4 mm.
InsertsAvailable in 1, 1.5 and 2 mm widths and two insert seat styles, T for right hand and U for left
hand holders. Depth limitations as below.
Neutral inserts and front angled versions in 5° and 10° available.
Tailor made inserts available from 0.5–3.20 mm.
Geometries
Available in two geometries, CM and CS.
CM chip breaking geometry is intended for normal cutting conditions.
CS geometry with an extra sharp edge together with an open chip former should be used at
very low feeds and in low-carbon materials. CS is also intended for multi-spindle machines.
Right hand styleinsert (T)
Left hand styleinsert (U)
Insert width,
mm
Max. cutting depth, ar, for
CoroCut3 inserts, mm
1.0 4.3
1.5 6.4
2.0 6.4
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Q-Cut 151.2 – for deep partingQ-Cut 151.2 is recommended for deep parting operations. The V-clamped 1-edged insert is
ideal for parting operations. Together with parting blades, cutting depths of up to 55 mm are
possible.
Parting geometries
FinishingLow feed
7E
MediumMedium feed
5E
RoughingHigh feed
4E
Sharp 5F
OptimisedChip control
9E
Q-cut insert parting geometries
Inserts
Choose from a programme of insert widths
from 2-8 mm.
Geometries
Dedicated geometries for parting7E, 5E, 4E, 5F and 9E..
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Q-Cut 151.3 – for internal machining
and small diameter face groovingQ-Cut 151.3 is to be used for internal machining (diameters from 20–40 mm) and for face-
grooving of smaller diameters (first cut diameter from 24–40 mm).
The inserts are thinner in design in order to machine smaller diameters than the CoroCut 1-
and 2-edge inserts.To be used together with 151.3 bars and toolholders.
Precision
grooving
Face
grooving
Profiling
Low feed 4G 7P
Medium feed 7G
Inserts
A programme with widths from 2–8 mm.
Q-Cut inserts for internal/facegrooving use
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CoroCut XS – for external small micro
componentsCoroCut XS is a tangentially mounted system for precision machining in sliding head
machines. CoroCut XS is available for external parting, grooving turning, backturning and
threading applications. The extremely sharp cutting edges perform well at low feeds.
Inserts
Parting and grooving insert widths from 0.5–2.5 mm.
Parting off Grooving Turning Back Turning Threading
Low feed MACR MABR MAFR MABR MATR
CoroCut XS Micromachining
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CoroCut MB – a system for internal grooving,
threading and turningCoroCut MB has a front mounted exchangeable insert. Intended for internal machining in
hole diameter from 10–25 mm. Sharp cutting edges for good results at low feeds.
Boring bars in steel and carbide with through coolant to be used together with easy-fix
clamping for overhang up to 6 x D.
Inserts
Grooving inserts in widths from 0.7–4 mm. Profiling, face grooving and preparting insertsare also available.
Threading inserts for metric, UN and Whitworth forms.
Turning inserts for internal precision machining.
Grooving Face Grooving Profiling Preparting Turning Threading
Low feed MB-07GMB-09G
MB-09FAMB-09FB
MB-07RMB-09R
MB-07GX MB-07TMB-07TEMB-07B
MB-07TH
CoroCut MB, internal grooving
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U-Lock 154.0 – for economical circlip groovingWe recommend the U-Lock 3-edged inserts for both external and internal circlip grooving.
Inserts
A programme with widths from 1.10–4.15 mm.
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CoroTurn XS – a system for internal precision
machiningCoroTurn XS has an insert in the form of a carbide-rod mounted in a holder. It is intended
for precision machining in hole diameters from 3-12 mm, with extremely sharp cutting edges
for good results at low feeds.
Grooving Face Grooving Profiling Preparting Turning Threading
Low feed CXS-..G CXS-..F CXS-..R CXS-..GX CXS-..T CXS-..TH
CoroTurn XS, internal precision machining
Inserts
Grooving insert widths from 0.78–2 mm, facegrooving, profiling and preparting inserts are
also available.
Threading inserts for metric, UN and Whitworth forms.
Turning inserts for internal precision machining.
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CoroMill 327 – grooving cutter for milling
applicationsCoroMill 327 is intended for circlip grooving, T-slots milling and all other slot milling opera-
tions. CoroMill 327 is based on a sharp 3-edged insert together with a rigid screw clamping.
The inserts produce grooves in holes of diameter ≥10 mm and width from 0.7–5.15 mm.
Weldon shanks in steel and carbide for different overhangs are available.
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CoroMill 328 - grooving cutter for milling
applicationsCoroMill 328 is intended for circlip grooving, T-slots milling and all other slot milling opera-
tions. The CoroMill 328 has milling cutters for holes from min. 39 mm and 3-8 insert seats.
Sharp inserts are available from 1.3-5.15 mm width.
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CF
CS
CM
CR
PartingFor parting we offer dedicated geometries with the CoroCut system. These geometries are
designed to make the chip narrower than the groove and to give excellent chip control. The
geometries are designed for high feed (CR), medium feed (CM) and low feed (CF). For
extremely low feed and lowest possible cutting forces we offer the CS-geometry.
For more information, see the Main catalogue.
For more information about cutting speed, see page 74.
The CoroCut 1- and 2-edge solutions offer excellent stability and
give good results at medium cutting depth. For small cutting depths
CoroCut3 is the first choice.
For large cutting depths CoroCut 1-edge is the first choice and
Q-Cut 151.2 is second choice.
Radial feedInsert width (Ia),3.0 m
Feed (f n
),mm/r
0.05 0.1 0.2 0.3 0.4
= Recommendedstarting value.
= First choice.
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Machining specification
Operation: Parting off to centreMaterial: JIS SCM 415, CMC 02.1, HB 240Toolholder: LF123F10-2525BInsert: N123F2-0250-003-CRGrade: GC1125
Cutting data
Width of insert:Cutting speed:Feed (reduced at the end):Time in cut:Components:
Competitor
2.0 mm129 m/min0.05 mm/r0.11 min1200 pcs
Sandvik Coromant
2.0 mm129 m/min0.07 mm/r0.08 min2600 pcs
Parting of barsWhen parting it is recommended to use an
insert as narrow as possible in order to save
material and minimise cutting forces.
Long overhangs (ar) causing instability could
result in tool failure and poor component
quality.
The recommended overhang should not
exceed 8 x la (width of insert).
Select correct width, geometry and system for parting of bars
Tool life +116% Productivity +40% Annual time saving 175 hours
Recommended grade and cutting data
Starting grade is GC2135. Cutting speed 125 m/min.
For more information about grades, see page 71.
Ø 20.5
15
Case story
Component
dia, mm
Insert width,
Ia, mm
Insert
geometry
Tool system Feed start
value, mm/r
< 8 1 CM/CS CoroCut3 0.05
8–12 1.5 CM CoroCut 2&3 0.07
12–16 2 CM CoroCut 2 0.08
16–24 2.5 CR CoroCut 2 0.08
24–32 3 CR CoroCut 2 0.12
32–40 4 CR CoroCut 2 0.15
40–48 5 4E Q-Cut 0.1848–56 6 4E Q-Cut 0.20
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±0.1 mm
Practical hints
For a correct cutting process, be sure that
the cutting edge height is maintained at a
tolerance of ±0.1 mm of work piece centre.
The most difficult sequence in parting to
centre is when the component “drops” off.
The cutting speed is extremely low, generat-ing built-up edge on the insert corner. When
the cut-off part of the component falls there
is a large risk of chipping of the insert cor-
ners.
To increase tool life substantially and prevent inconsistent performance:
Re• duce the feed rate by up to 75% – around 2 mm prior to the part falling off.
Stop the parting operation prior to reaching the centre point. The cut-off part will drop at•
a point prior to centre due to its weight and length. Leave the pip on the bar to be facedoff with a conventional tool.
Do not pull insert back after cutting off, pull it away then back.•
Dwelling (microsteps) helps chip breaking in long chipping materials.•
When cutting hexagon bars, a reduction of feed is necessary until you have a constant cut-•
ting.
Increase speed aas the bar gets shorter in bar feeding machines.•
A subspindle can be used to pull away the component before the insert reaches the centre.•
fn
n
D D
vc
Feed rate reduction.
0.25 x fn
~2 mm
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Pip free parting
To avoid or minimise pips use right hand
style or left hand style ground inserts with
smallest possible front angle that gives an
acceptable component.
Inserts with 5° front angle are available in
CF, CM and CR geometries. Inserts with10° and 15° front angle are available in CS
geometry.
Note that a large front angle reduces
pips, but will not produce a straight cut and
give poorer surface finish and shorter tool
life.
For straight parting and high stability use
a screw clamp holder with the shortestoverhang, ar. A reinforced toolholder will
increase the stability even more.
Reinforced blade.
Screw clamp holderwith short a
r.
Parting – small
diameter barsWhen parting off small diameter bars, ensure
the lowest possible forces are generated.
Use inserts with smallest possible width and
sharpest edges, i.e. CS or CF geometries.
The precision ground CoroCut XS hav-
ing widths down to 0.7 mm and 15° front
angled for pip-free parting are ideal for these
types of applications.
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Component
wall thickness,
mm
Insert width,
la, mm
Insert
geometry
Tool system Feed
start value,
mm/r
< 4 1 CM/CS CoroCut3 0.05
4–6 1.5 CM CoroCut 2&3 0.07
6–8 2 CM CoroCut 2 0.08
8–12 2.5 CM CoroCut 2 0.08
12–16 3 CM CoroCut 2 0.12
16–20 4 CM CoroCut 2 0.15
20–24 5 4E Q-Cut 0.18
24–28 6 4E Q-Cut 0.20
Parting-off tubesThe width of the insert is recommended to
be as narrow as possible in order to save
material and minimise cutting forces.
Long overhangs (ar) causing instability could
result in tool failure and poor component
quality.
Select correct width, geometry and system for parting of tubes
Recommended grade and cutting data
Starting grade is GC1125. Cutting speed 125 m/min.
For more information about grades, see page 71.
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Parting into a drilled hole.
±0.1 mm
For correct cutting process, be sure that the
cutting edge height is maintained at a toler-
ance of ±0.1 mm of work piece centre.
When parting into a drilled hole and insert•
enters the cone of the hole, the unbalanced
cut may force the blade to deflect. This
will create increased forces on one corner
of the insert which may result in insert
chipping and inconsistent tool life.
When parting into a drilled hole, always•
ensure that the drilled depth allows for the
component length and the width of the
parting insert, see picture.
To reduce burrs on the inside, use•
CoroCut XS dedicated for preparting and
chamfering inserts. Also other tools can be
used for making an internal groove.
To avoid burrs on inside.
Practical hints
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Burr free parting
To avoid or minimise burrs use right or left hand style ground inserts with smallest possible
front angle that gives an acceptable component.
Inserts with 5° front angle are available in CF, CM and CR geometries. Inserts with 10° and
15° front angle are available in CS geometry.
Note that a large front angle reduces burrs, but will not produce a straight cut and will give
poorer surface finish and shorter tool life.
For straighter parting and the best stability use a screw clamp holder with the shortest over-
hang, ar. A reinforced toolholder will increase the stability even more.
Parting with short overhang
and reinforced holder.
2.5
Ø 10 Ø 32
15º
Machining specification
Operation: Parting of a tube (burr free parting)Material: CMC 01.1, HB 180Machine: CNC turning latheToolholder: LF123F20-2020BInsert: L123F20-0250-1501-CSGrade: GC1125
Cutting data
Cutting speed:Feed:Time in cut:Components:
Competitor
150 m/min0.1 mm/r0.067 min1100 pcs
Sandvik Coromant
150 m/min0.1 mm/r0.067 min2000 pcs
Tool life +82% Productivity +4% Annual time saving 8 hours
Case story
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Parting – thin-walled tubesWhen parting off into thin-walled tubes ensure the lowest possible cutting forces are gener-
ated. Use inserts with smallest possible width and sharpest edges, i.e. CF or CS geometries.
The precision ground CoroCut XS in combination with widths down to 0.7 mm gives the
lowest cutting forces.
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GroovingFor grooving applications we offer dedicated geometries with the CoroCut system, e. g. GF,
GM, TF and TM. These geometries are designed to give specific benefits in both radial and
face grooving, and other machining methods such as external and internal multiple grooving
and plunge turning.
The different geometries are suitable for high or low feed machining.
For circlip grooving, U-Lock 154.0 is the first choice for productive solutions.
TF – First choice, all-round geometry.
TM – Productive side turning.
GM – Chip control in different material.
GF – Precision grooving.
For more information about cutting speed, see page 74.
Radial feedInsert width (Ia),3.0 m
Feed (f n),
mm/r0,05 0,1 0,2 0,3 0,4
= Recommendedstarting value.
= First choice.
TF
TM
GM
GF
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Single cut groovingSingle cut grooving is the most economical and productive method of producing grooves and
is possibe for use on insert widths up to 8 mm.
The GF geometry precision insert has a width tolerance of ±0.02 mm. GF is our low feed
choice (0.02–0.25 mm/r) and GM is intended for tougher machining e.g medium feed
(0.04-0.30 mm/r).
The TF geometry is designed with wipers on the side in order to generate extreme high sur-
face quality on the side of the groove.
The stable CoroCut system makes it ideal to chamfer corners.
Choose correct width from our wide standard programme or order an insert that directly
corresponds to the actual groove with our Tailor Made programme, see page 78.
= Wiper designgiving superiorsurface finish
Recommended grade and cutting data
Starting geometry is TF and grade is GC1125.
Cutting speed 120-190 m/min and feed 0.06-0.12 mm/r.
For more information about grades, see page 71.
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A B
4
Ø 31.85
0.5 x 45º
11.3
When producing high quality grooves there is often a need for chamfered corners. One way
to produce these is to use a standard width CoroCut GF insert and after the groove is made,
use the corners of the insert to chamfer, see illustration A.
A more productive way when machining large series is to order a Tailor Made insert with the
exact form of the groove, see illustration B. Often cutting time can be reduced by up to 50%
compared to the previous method. In this case shape option 16 is used.
Read more about Tailor Made on page 78.
Machining specification
Operation: GroovingMaterial: CMC 02.1, HB 240Machine: CNC turning latheToolholder: LF123H13-2020BInsert: N123H2-0400-0002-GF Grade: GC1125
Cutting data
Cutting speed:Radial/axial feed:Time in cut:Components:
Competitor
110 m/min0.07/0,04 mm/r0.06 min500 pcs
Sandvik Coromant
120 m/min0.10/0.07 mm/r0.04 min1199 pcs
Tool life +139% Productivity +56% Annual time saving 173 hours
Case story
Practical hints
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Multiple grooving.
operations.
Plunge turning operation.
Methods of turning groovesThe most common applications for wide grooves or turning between shoulders are multiple
grooving, plunge turning or ramping. All three methods are roughing operations and have to
be followed by a separate finishing operation, see page 32.
A rule of thumb is that if the width of the groove is smaller than the depth – multiple groov-
ing should be used and vice versa for plunge turning. However for slender components ram-
ping may be used.
Plunge turning
Geometries TF and TM should be used for
plunge turning and ramping operations as
the inserts are made for both radial and axialfeeds.
Axial turning depth should not exceed
0.75 x width of the insert.
Multiple grooving
Geometry GM is the first choice in this
type of operation. Best tool life and swarf
is obtained by using an insert width to
produce full grooves first and then remove
the rings. This protects the corner radius
and directs the swarf into the middle of
the chip breaker. Choose ring width
0.6–0.8 x width of the insert.
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Ramping operation.
Continue cycle until required depth is achieved.
After the roughing operation a finishing cut is required to
achieve good surface finish, see page 32.
1. Radially infeed to required depth + 0.2 mm (max 0.75 x insert width).2. Retract radially 0.2 mm.
3. Turn axially to opposite shoulder position.4. Retract radially 0.5 mm.
Roughing – recommended machining sequence
In order to generate a flat bottom and high quality on the side of the groove the following
machining sequence is recommended.
Ramping
The ramping method is recommended to
avoid vibration and minimise radial forces
when machining slender components. It also
gives best swarf control and reduces notch
wear in advanced materials.
By using a round insert, RO or RM geom-etry, the feeding can be done faster, giving an
even and higher productivity.
Ramping, however, does double the number
of cuts required.
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Finishing of grooves
Care must be taken when machining around the bottom radius of the groove. As the insert
contours around the radius, most of the movement is in the Z direction. This produces an
extremely thin chip along the front cutting edge and can result in rubbing and hence vibra-tion.
To prevent this adopt the following machining sequence – axial and radial cutting depth
should be 0.5–1.0 mm.
Plunge turning
Direction of feed
Feed – axial – 0.3 mm/r
Direction of feedFeed – radial – 0.2 mm/r
Cycle time comparison
Insert width 6 mm
Insert width 6 mmDepth of cut 3 mm
Direction of feed
Feed 0.2 mm/r
24
16 36 46
21
9
Multiple grooving
24
16 36 46
21
9
x
z
32 sec 70 sec 56 sec
37 sec 68 sec
(7 passes)
44 sec
(3 passes)
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BA
Axial turning – surface finishDue to the wiper effect achieved in axial turning with CoroCut it is possible to generate a
high quality surface finish. Ra value below 0.5 can be generated, and also high bearing ratio is
achieved resulting in the elimination of a grinding operation.
Comparison between CoroCut(A) and conventional turningtools (B). For comparison of surface finish achieved, seethe following graph.
Surface finish comparison
Depth of cut/feed rate
When high feeds are used in conjunction with low depth of cut (DOC), or low feeds with
high DOC, sufficient deflection of the tool will occur to give clearance for the front cutting
edge.However, where low feeds and low DOC are combined the axial forces may be insufficient
to give clearance. This may cause rubbing and hence vibration.
Solutions
1) If possible raise DOC or feed rate.
2) Use TF geometry with a concave cutting edge which will limit contact.
3) By changing to a holder with longer Ar , will affect the result.
Surface finish,Ra µm
Feed, mm/r
4.0
3.5
3.0
2.5
2.0
1.5
1.00.5
0.1 0.15 0.2 0.25 0.3
TNMG 160404
TNMG 160408
CoroCut – 5 mm RM
CoroCut – 4 mm TF
CoroCut – 6 mm TM
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Recommended grade and cutting data
First choice geometry for turning of grooves is TF for low feed and TM for higher feeds.
Starting grade is GC1125. Cutting speed 150 m/min, radial feed 0.12 mm/r and axial feed
0.2 mm/r.
Roughing
Finishing
Ø 98
Ø 90
12.4
Roughing
Finishing
100
58
16
Tool life +15% Productivity +68% Annual time saving 91 hours
Tool life +23% Productivity +7% Annual time saving 63 hours
Machining specification
Operation: Plunge turningMaterial: CMC 02.1Machine: CNC turning latheToolholder: LF123H13-2525BMInsert: N123H2-0400-0004Grade: GC1125
Cutting data - Roughing
Geometry:Cutting speed:Radial/axial feed:Depth of cut:Time in cut:Components:
Cutting data - Roughing
Geometry:Cutting speed:Radial/axial feed:Depth of cut:Time in cut:
Components:Total time in cut:
Competitor
220 m/min0.15/0.2 mm/r1.9 mm0.23 min350 pcs
Competitor
350 m/min0.1 mm/r0.25 mm0.20 min
150 pcs0.43 min
Sandvik Coromant
TM250 m/min0.15/0.2 mm/r1.9 mm0.20 min400 pcs
Sandvik Coromant
TF 350 m/min0.1 mm/r0.25 mm0.20 min
250 pcs0.40 mn
Case story
Machining specification
Operation: GroovingMaterial: Stainless steel, CMC 05.2Machine: CNC turning lathe
Toolholder: LF123K32-2525BMInsert: N123K2-0600-0004-TF Grade: GC1125
Cutting data
Cutting speed:Radial/axial feed:Time in cut:Components:
Competitor
120 m/min0.15/0.2 mm/r0.50 min156 pcs
Sandvik Coromant
150 m/min0.2/0.3 mm/r0.298 min183 pcs
Case story
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Circlip groovingFor circlip grooving we have several main systems to choose from. For best economy use the
three edged U-Lock 154.0 system (width 1.15–4.15 mm) for both internal and external opera-
tions. The second choice is CoroCut with GF geometry (width 1.85–5.15 mm) giving good
productivity in external operations.
For internal machining in small holes from 10 mm diameter and width 0.73–1.70 mm, the
CoroCut is the first choice. For holes from 4.2 mm diameter and width 0.78–1.57 mm, the
CoroTurn XS can be used.
U-Lock 154.0 insert and CoroCut insert in GF.
All systems have sharp edges in order to generate a good cutting process and to achieve long
tool life.
Recommended grades and cutting data
Starting grade for U-Lock 154.0 is GC1020 and for CoroCut GF grade GC1125.Cutting speed 150 m/min and feed 0.08 mm/r.
For milling of circlip grooves on non-rotation products, the CoroMill 327 is the first choice
from 10 mm diameter and widths from 0.7–5.15 mm. CoroMill 328 is the choice for produc-
tive milling from 39 mm diameter and width 1.3–5.15 mm.
CoroCut MB and CoroTurn XS for internal circlips.
CoroMill 327 and CoroMill 328 for milling of circlip in non-rotating components.
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Face groovingFor components having an axial groove into the component it is
important to choose the correct toolholder. The toolholder must be
adapted to the bending radius of the groove and should therefore be
curved. See Face grooving shank holders on page 61.
CoroCut 1- and 2-edged grooving and turning inserts with GM, TF
and RM geometries can be used. For small first cut diametersQ-Cut 151.3 with geometry 7G and 7P can be used. Normal feed
methods should be used. SeeTurning of grooves on page 30.
The CoroCut MB and CoroTurn XS system are dedicated for a
smaller diameter range and is available with face grooving inserts in
widths from 1.0–3.0 mm.
Toolholders
Use CoroCut solid toolholders especially designed for face grooving type RF/LF (0° insert
angle) or RG/LG (90° insert angle) covering first cut from 34–400 mm diameter giving thebest stability.
For grooving depths up to 4.5 mm, a special shallow grooving toolholder is available, see
page 62.
CoroCut SL face grooving blades can also be used together with Coromant Capto and shank
tool adaptors, making it possible to build many different combinations.
Recommended grade and cutting data
Starting grade GC1125.
Cutting speed 100–125 m/min, radial feed 0.10 mm/r and axial feed 0.15 mm/r.
RF/LF holder. RG/LG holder. The CoroCut SL system.
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1
2
3
1
2
3
Roughing
When roughing the first cut should always
be on the largest diameter and work inwards.
Cut one gives chip control but no chip
breaking and the width of cuts two and three
should be 0.5–0.8 x width of the cutting
edge. Chip breaking will now be operatingat an acceptable level and thus, after the first
insertion, the feed can be slightly increased.
When retracting, offset the insert slightly
from the inner edge of the groove.
Finishing
When finishing, machine the first cut within
the given diameter range. For more information, see page 30.
The second cut finishes the diameter, radius
and faceturns inwards.
Finally the third cut finishes the inner diam-
eter to correct dimensions.
1
2
Practical hints
1. If the support web on the tool rubs against the
workpiece diameter on the inner side of the sup-
port web:
tool is wrong size for the diameter range;•
change tool.
tool is not parallel to axis of rotation; correct.•
lower the tool below the centre line.•
2. If the support web on the tool rubs against the
workpiece diameter on the outer side of the sup-
port web:
tool is wrong size for the diameter range;•
change tool.
tool is not parallel to axis of rotation; correct.•
lift the tool above the centre line.•
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ø25
2,8
2,0
ø17
7
Ø 70
6
Ø 90
Machining specification
Operation: Face groovingMaterial: Stainless steel SS 2343, CMC 05.2Machine: CNC turning latheToolholder: RF123K25-2525B-058BMInsert: N123K2-0600-0004-TF Grade: GC2135
Cutting data
Cutting speed:Feed:Time in cut:Components:
Competitor
110 m/min0.08 mm/r0.18 min390 pcs/edge
Sandvik Coromant
110 m/min0.16 mm/r0.09 min560 pcs/edge
Tool life +100% Productivity +44% Annual time saving 43 hours
Case story
Machining specification
Operation: Face groovingMaterial: Unalloyed steel, C35, CMC 01.1Machine: CNC Bar feedToolholder: MB-A16-20-09RInsert: MB-09AF200-02-14RGrade: GC1025
Cutting data
Cutting speed:Feed:Time in cut:Components:
Competitor
95 m/min0.02 mm/r0.17 min400 pcs/edge
Sandvik Coromant
150 m/min0.025 mm/r0.09 min500 pcs/edge
Tool life +25% Productivity +95% Annual time saving 284 hours
Case story
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UndercuttingOn many components there is a need for
a grinding operation to achieve very close
tolerances. In order to grind into a shoulder
a clearance is needed. For this undercutting
operation we recommend the use of round
shaped inserts. For small clearance depthsuse CoroCut 1- or 2-edge inserts with RO
or RM geometries and for larger clearance
depths Q-Cut with 4U geometry is the best
choice.
Recommended grade and cutting data
Starting grade GC1125.
Cutting speed 150 m/min and feed 0.07 mm/r.
RX/LX holder RAX/LAX holder RS/LS151.22 holder
Toolholders
Use CoroCut toolholders type RX/LX with insert angle 7°, 45° or 70°. For internal opera-
tions RAX/LAX style bars are available.
For external machining with Q-Cut, Coromant Capto and toolholders type RS/LS151.22 are
available.
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Internal groovingMany components have an internal groove, most of them
are close to the entrance into the hole e.g circlip grooves.
The most common method to produce internal grooves is
by radial grooving but also multiple grooving and plunge
turning can be used, see page 30.
CoroCut with dedicated geometries GF, GM, TF and TM
to be used for internal operations. For small diameter bores
down to 12 mm, the Q-Cut 151.3 with geometry 4G can be used.
The CoroCut MB is available in solid steel and solid carbide bars for better stability in
longer overhangs. The precision grooving insert is available in widths from 0.7–3 mm.
For real small diameters 4.2 mm, the CoroTurn XS system has insert widths in the range of
0.78–2 mm.
During chip evacuation there is a large risk of chip jamming resulting in tool breakage,
especially when grooving into small holes. The chips have to be removed from the groove,
change direction 90°, pass the side of the toolholder and finally removed from the hole. For
secure chip evacuation, it is necessary to have a large deviation between hole diameter and
bar diameter hence a small diameter bar is the best option. Unfortunately there is a high risk
of vibration with small diameter bars.
Stability is the key to avoid vibration and this is related to the tool overhang and how far
into the hole the groove is machined. The risk of vibration is avoided by using the largest
bar size possible, while chip chip jamming avoidance call for the opposite.
The overhang should not exceed 3 x D for solid steel and 5 x D for solid carbide boring bars.With damped boring bars it is possible to cut with overhang up to 5 x D and with a carbide
reinforced damped bar up to 7 x D.
Carbide reinforced damped bars
dmm
dmm
dmm
Damped and carbide bars
Solid steel bars
L < 7 x dmm
L ≤ 5 x dmm
L ≤ 3 x dmm
Use EasyFix clamping sleeves for accuratemachining with less vibration and precise
height.
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Recommended grade and cutting data
Starting grade GC1125.
Cutting speed 125 m/min and feed 0.07 mm/r.
3.15
Ø 40
3
To avoid vibration the set up should have the shortest possible overhang with the lightestcutting geometry possible e. g. GF or TF.
Vibration can also be avoided when machining large width grooves by making several inser-
tions with a narrower insert and then make a finishing cut, see illustration A.
A groove can also be machined with single insertion followed by plunge turning, see illustra-
tion B. This method also avoids vibration.
To get the best chip evacuation:
Start at bottom of the hole and machine back front of the hole.•
Plunge turning/ramping.•
Use right hand or left hand style inserts to direct chips when roughing.•
Practical hints
Machining specification
Operation: Internal circlip grooving
Material: Stainless steel 316L, CMC 05.2Machine: CNC turning latheToolholder: RAG123G09-32BInsert: N123G2-0315-0002-GF Grade: GC1125
Cutting data
Cutting speed:Feed:Time in cut:Components:
Competitor
110 m/min0.06 mm/r0.059 min712 pcs/edge
Sandvik Coromant
140 m/min0.1 mm/r0.028 min1230 pcs/edge
Case story
Tool life +73% Productivity +100% Annual time saving 60 hours
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When machining components with complex shapes CoroCut offers great opportunities for
rationalization. Since one single tool can be used instead of right and left hand conventional
tools, the tool range is minimised. This results in fewer tool changes and more room in the
turret. Using profiling inserts is often a good way of removing a lot of material in a short
time. The stability of the CoroCut system offers strong possibility to use high cutting data.
The round shaped inserts have dedicated geometries e.g. RM for medium feed and tougher
conditions, precision ground RO for stainless steel materials and other sticky materials. AM
is a profiling geometry with very sharp and positive edge dedicated for non-ferrous materialse.g. aluminium. For machining hardened steel RE is available plus the RS geometry for finish-
ing of non-ferrous materials.
Profiling
RM for first choice for profiling geometry.
RD for precision grand sharp profiling geometry.
AM for grand sharp geometry for aluminium materials.
RS for diamond tipped profiling insert for non ferrous material.
RE for CBN-tipped profiling insert for hardened material. For more information about cutting speed, see the page 74.
Radial feedInsert width (Ia),6.0 m
Feed (f n),
mm/r0,1 0,2 0,3 0,4
= Recommendedstarting value.
= First choice.
RM
RO
AM
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Wrap around is a problem that occurs with round inserts when plunging or profiling into
corners. A large area of the insert is in contact all the time, creating high cutting pressure,
so the feed needs to be reduced. HHowever, if reduced too much, vibration may occur. To
reduce this problem the insert diameter should be as small as possible compared to the radius
being generated.
A good starting point is to use 50% feed into radius plunging compared to parallel cuts, see
example.
If you must use the same insert radius, microstops (dwelling, etc) should be used to make the
chip short and to avoid vibration.
Recommended grade and cutting data
Starting grade GC1125.
Cutting speed start value 150 m/min and feed start value 0.20 mm/r.
f n1 = parallel cuts – max. chip thickness 0.15–0.40 mm
f n2 = radius plunging – 50% max. chip thickness
Insert radius ≥ component radius
Not recommendedInsert radius < component radius
Recommended
Machining specification
Operation: Profiling ballMaterial: BS080M46, CMC 01.2, HB 180Machine: CNC turning latheToolholder: LF123J13-2525BMInsert: N123J2-0600-RMGrade: GC1125
Cutting data
Cutting speed:Feed:Cutting dept:Time in cut:Components:
Competitor
200 m/min0.3 mm/r0.5–2.0 mm1.07 min175 pcs/edge
Sandvik Coromant
200 m/min0.4 mm/r0.5–2.0 mm0.8 min248 pcs/edge
Case story
Tool life +42% Productivity +25% Annual time saving 82 hours
Practical hints
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Hard part machining
For productivity increase without grinding
Modern manufacturing technology places increasing demands on components to be made in
one set-up, creating the need for machining hardened components.
Modern cutting tool materials such as CBN (cubic boron nitride) act as a productivity
booster when turning is used instead of grinding. For CoroCut 1-edge a small piece of CBNis brazed into a carbide body making it possible to groove and profile in hardened compo-
nents.
Both hardened as well as induction hardened components can be machined. The groove can
be made directly into the hardened material. In volume production a pre-grooving operation
before hardening can be an advantage to get good chip control.
Components with hardness from 50–65
HRC are possible to machine.
CoroCut inserts with geometries GE forgrooving and RE for profiling are avail-
able from 3-8 mm widths in CBN grades
CB7015 and CB20. CB7015 is the first
choice being suitable for both continious
and interupted cuts. The inserts are designed
to achieve good surface quality and to keep
close tolerances.
Recommended grade and cutting data
Grade CB7015. Cutting speed 130 m/min and feed 0.05 mm/r.
Cutting depth when side turning 0.1–0.8 mm.
Geometry GE. Geometry RE.
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r e
Adjust centre height to correct position to•
get predictable tool life, see page 21.
When machining pre-made grooves adjust•
horizontal position to equalize loads on
the corners in order to get long tool life. If
you have to machine in the bottom of thegroove, reduce feed at the end of the cut.
100
8 +0.1
3
Pre-made grooved component.
≤ 0.5 r e to reducenotch wear
Practical hints
Machining specification
Operation: Grooving in hardened materialMaterial: 20 Mn Cr 5, CMC 04.1, 59–61 HRCMachine: CNC turning latheToolholder: LF123L25-3225BMInsert: N123L1-080008S01025Grade: CB7015
Cutting data
Insert width:Cutting speed:Radial/axial feed:Time in cut:Components:
Competitor
5 mm – 2 steps170 m/min0.04 mm/r0.28 min120 pcs/edge
Sandvik Coromant
8 mm – 1 steps150 m/min0.05 mm/r0.13 min169 pcs/edge
Case story
Tool life +44% Productivity +115% Annual time saving 112 hours
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Geometry RS
Machining of aluminium and
non-ferrous materialsMany components are made in aluminium or other
non-ferrous materials such as copper, brass, bronze but
also plastic materials.
A common feature with these materials is that asharp edge and an open chip breaker is needed to be
successful. In order to achieve these sharp edges, nor-
mally the edgeline has to be ground and the carbide
needs to be either uncoated or with a thin coating.
Grade GC1005 is recommended as first choice for roughing operations and sharp edged H10
or H13A for finishing operations.
For components demanding extreme high surface finish a diamond tipped insert is recom-
mended as it gives the possibility of using high cutting data and to achieve long tool life.
Geometry AM
Geometry GF Geometry CS
Recommended grades and cutting data
Grade GC1005 for roughing, grade H10 and H13A for finishing.
Cutting speed 300 m/min and higher, feed 0.2 mm/r.
Profiling
The AM geometry in grade GC1005 and
H10 is designed for these materials and
combined with the superior stability of the
CoroCut system it is also suitable for pro-
filing of aluminium wheels. When extremesurface finish is required the CoroCut 1-edge
insert with diamond tipped RS geometry in
grade CD10 should be used.
Grooving/Parting
For grooving and parting operations GF
geometry in grade H13A is a good choice. If
there is a need for pip and burr free machin-
ing the sharp CS geometry in grade GC1125
is first choice.
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Heat resistant super alloys (HRSA)
HRSA falls into three groups: nickel-based, iron-based and cobalt-based alloys. The physical
properties and machining behaviour of each group varies considerably. Whether the metal
is annealed or aged is particularly influential on the subsequent machining properties as the
hardness varies from 150 to 440 HB.The machinability of HRSA is generally poor compared to both general steels and stainless
steels.
In this material we recommend to use CoroCut 1- and 2-edged inserts with PVD coating like
GC1105 for medium finishing machining and MTCVD grade S05F for roughing.
For higher cutting speed ceramic inserts in grade CC670 for finishing in the 150.23 system
will improve the productivity.
Recommended grades and cutting data
First stage machining (Roughing)
Starting grade S05F. Cutting speed 60 m/min and feed 0.10 mm/r.
Intermediate stage machining (Medium)
Starting grade GC1105. Cutting speed 50 m/min and feed 0.10 mm/r.
Last stage machining (Finishing)
Starting grade GC1105. Cutting speed 50 m/min and feed 0.10 mm/r.
Starting grade CC670. Cutting speed 300 m/min and feed 0.10 mm/r.
Titanium alloysTitanium alloys are typically machined in the annealed or solution treated and aged condi-
tion, when hardness can vary between 300-440 HB. The machinability is also poor compared
to both general steels and stainless steels, which imposes particular demands on the cutting
tools.
For good results in these materials we recommend to use CoroCut 1- and 2-edge inserts with
a sharp edge e.g. in uncoated grade H13A.
Recommended grade and cutting data
Starting grade H13A. Geometries TF/GF/RO.
Cutting speed 60 m/min and feed 0.15 mm/r.
HRSA and titanium grooving
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CoroTurn HP
– High pressure coolantIn order to achieve chip-breaking in tita-
nium alloys and to prolong tool life or
to have increased productivity due to
higher feeds we recommend to install highpressure coolant in your machine.
Accurate coolant jets with laminar parall-
lel flow, are easily channeled through the
Coromant Capto® coupling.
The jets produce a hydraulic wedge, lift-
ing the chip, reducing the temperature and
improving the chip control. See the illustra-
tion.
Contact your local Sandvik Coromant
salesman for more information.
Standard Coolant
70 bars HPC
Steel
SS1672CNMG 120408-PF
4225
Stainless steel
Sanmac 316LCNMG 120408-MF
2025
Titanium
Ti6Al4VCNGP 120408
H13A
HRSA
Inconel 718CNGP 120408
S05F
Aluminum
AlumecCNGP 120408
H13A
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Small part machining – sliding head machines
The machines and the demand
put on the tooling
Small part machining and sliding head
machines focus on components smaller than
32 mm in diameter, also known as Swissmachines. In these machines the material
slides through the guide bush and is rotated
by a second spindle that also pushes the
material through the guide bush. The mate-
rial is then acting as the z-axis in the machine
and the tools stay close to the guide bush for
maximum stability.
These machines enable small diameter com-
ponents in large batches to be manufacturedin the most productive way.
Sliding head lathe.
Sliding head machines demand special fea-tures from cutting tools such as:
Precision made holders and inserts.•
The parting-off tool must be stable enough•
so that it can be used as a stop for the bar
material.
Toolholders without offset when the•
machines are designed with gang tool rack.
The turning applications in sliding headmachines are parting, grooving, turning,
back-turning and threading.
Oil is used as coolant and has different
effects on the metal cutting action compared
to standard lathe cutting fluid, such as differ-
ent chip flow, varied chip breaking and tool
life.
Sliding head machine with
gang tool rack, equipped
with QS™ -holding system.
Guide bush
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Choosing a tool system
CoroCut
-S
U-Lock
-S
CoroTurn 107
-S
CoroTurn 111 CoroCut
MB
CoroCut
XS
CoroCut
XS
CoroCut
XS
CoroTurn
XS
Work piece
diameter range
32
16
8
2
External parting and grooving
When choosing the appropriate parting tool there are some things to keep in mind.
Depending on the material range and spindle size of the machine, tools of different styles
should be selected with care.
From 1.0–13 mm diameter
– CoroCut XS tools are the ideal choice as they have been made to a high degree of accuracy
with holders and inserts all precision ground. The component tolerances, therefore, are bet-
ter maintained and the sharper inserts produce a superior cutting action. CoroCut XS hold-
ers can also be used as a stop for the bar material.
CoroCut XS tools.
Recommended grade and cutting data
Starting grade GC1025.
Cutting speed 150 m/min and feed 0.08 mm/r.
Parting off
Radial feedInsert width (Ia),3.0 m
Feed (f n),
mm/r
= Recomended start-ing value.
Parting &
grooving
Threading Turning Internal
machining
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Holder with reinforced blade
Recommended grade and cutting data
Starting grade GC1125.
Cutting speed 150 m/min and feed 0.08–0.1 mm/r.
From 12–32 mm diameter
– CoroCut 1- and 2-edge are the ideal
choice. Optimised holders with –S in the
code indicate that they are designed for
sliding head machines and have beneficial
features such as angled insert clamping screw
for easier clamping and blade reinforcement
for better stability. These toolholders can
also be used as a stop for the bar material.
Practical hints
The QS - holding system is a quick-change system of toolholders, stop and wedge designed•
to maximize production.
The system save valuable machining time giving easy set-up of tools to dramatically reduce
insert changing time.
Avaliable for Citizen and Star sliding head machines!
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CoroCut® XS for external grooving applicationsThe CoroCut XS programme includes grooving inserts ranging in width from 0.5 mm, with
and without a chip forming geometry, and also dedicated parting inserts from 0.7 mm wide.
Turning, back turning and threading inserts can also be used in the same holder.
Guide-bush
Sub-spindle
If the machine has a sub-spindle a neutral style insert can be used without leaving a pip or•
burr on the finished component.
The subspindle can be used to pull away the component before the insert reaches the centre.•
However, if the machine does not have a sub-spindle it is important to choose an insert•
with a right or left hand style insert with at least 10° front angle as this will enable the pip/
burr to be removed.
Practical hints
CoroCut XS holders with -X in the code are designed for parting operations in sliding•
head machines with a sub-spindle where there is a limited tool space. This tool enables
the sub-spindle to get close to the main spindle without colliding with the toolholder, see
illustration.
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CoroTurn® XS for internal machining(Diameter area from 4.2–12 mm)
For internal grooving CoroTurn XS is the ideal tooling family. The smallest bore possible for
grooving with CoroTurn XS is 4.2 mm and is available with different insert widths.
This tooling system has four insert sizes dedicated to different bore diameters. Also a range
of various lengths is available for specific applications. However, the shortest possible over-hang should always be the first choice.
CoroTurn XS is precision made and both holders and inserts are made to withstand the
demands of many applications. Accurate clamping of the insert ensures correct centre height
is maintained at all times.
Always correct centre height with CoroTurn XS.
CoroTurn XS – four insert sizes and various insert lengths.
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The CoroTurn XS system includes different insert types for a wide range of applications i.e.
grooving, profiling-grooving, face-grooving, pre-parting as well as turning, back-turning and
threading.
Grooving
Grooving widths from 0.78–2 mm are available in different lengths for maximum stability, a
very important feature when grooving.
Profiling
Round insert style for internal profiling and grooving available insert widths from 1–2 mm.
Face grooving
Face grooving inserts are available for hole diameters from 6.2 mm and insert widths
from 1–3 mm. The maximum cutting depth for these inserts is 6 mm.
Grooving
Turning
Threading
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Recommended grade and cutting data
Grade GC1025.
Cutting speed 100 m/min, feed 0.015 mm/r.
GroovingInsert width (la),mm
2.0
Feed (f n),
mm/r
0,01 0,015 0,02 0,025
= Recommendedstarting value.
Pre-parting
Special inserts are available for producing a
45° chamfer inside the bore before parting
off the component, see the illustration.
1.5
1.0
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Parting and grooving sets high demands on accessibility since the inserts are often fed deep
into the material.
This means narrow machining and therefore the length of the tool increases as the diameterincreases. Tools and tooling systems with high stability are therefore very important.
For best productivity and economy we recommend the Coromant Capto system, offering
exceptional accuracy and stability and a full programme of clamping units, cutting units and
adaptors.
Of course we also offer a programme of conventional toolholders.
The new modular blade system, CoroCut SL, offers a large variety of blades to build your
own holder for these areas.
Tool holding systems
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Screw clamping
Clamping of CoroCut 1 and 2-edge insertsThe insert clamping system has been designed to counteract high axial forces from both
sides. For the smaller inserts (insert seats D–G) a V-profile clamping is used, but for larger
inserts (insert seats H–L) the unique rail design adds superior stability to the insert clamping.
The rail system should be first choice for profiling and turning applications (generating side
forces) giving increased cutting data and highest stability.
Insert
Holder
V-shape Rail-shape
The force holding the insert is generated by two different designs.
1. Screw clamping.
2. Spring clamping.
Spring clamping
Spring clamping
Parting blades have deep accessibility in narrow areas due to spring clamping. This allows for
quick and easy clamping and loosening in the same operation, due to an excentric key.
See the pictures above.
Screw clamping
All our solid toolholders/bars have integrated screw clamping. This gives very stable and
secure clamping of the insert and is recommended for applications where large cutting forces
arise (together with rail insert seat). This is particularly important when combined with small
cutting depths as in longitudinal turning, profiling and face grooving.
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Insert seats
The programme is based on eight different insert seats depending on insert widths and
geometries, see the table.
Insert seat size D E F G H J K L
Insert widths, mm 1.5 2.0-2.4 2.4-3.2 3.0-4.0 4.0-5.0 5.0-6.4 6.0-7.1 7.9-8.0
Max cutting dept
Ar max
12.9 19.0 18.9 18.8 23.7 23.6 23.5 28.4
Insert seat size to correspond with insert and toolholder.
CoroCut
Q-Cut
The Q-Cut system is based on only a V-shaped form, ideal for straight cutting forces, e.g.
parting off applications. Q-Cut have 7 different insert sizes of 20, 25, 30, 40, 50, 60 and 80.
The toolholder have a screw and spring clamping design.
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Parting bladesIntended for parting-off and deep grooving applications. For mounting in the machine a
separate tool block must be used having normal shank sizes or Coromant Capto mounting.
Practical hints
In order to avoid vibration and to achieve best tool life adjust the overhang,• ar, of the blade
to obtain the shortest possible overhang to suit the application. See drawing below. Max ar
is 55 mm.
Choose a 2-edged insert having an a• r larger than the cutting depth, if not possible choose a
1-edged insert, see Main catalogue information.
Maxar
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Short version. Long version. Holder for small
part machining.
To minimise risk of vibration and deflection always choose:
Toolholder with smallest possible overhang.•
Toolholder with maximum shank dimension.•
Blade or holder with maximum blade width (largest possible insert seat size).•
Solid toolholdersIntended for grooving, turning and profiling applications in Coromant Capto and shank
holder versions. Available in right hand, left hand and neutral style in short and longversions (ar).
This programme also includes a separate small part machining programme in smaller shank
sizes with an angled insert clamping screw for easier changing of insert. These toolholders
without offset are dedicated for sliding head machines.
Practical hints
If using screw clamped reinforced blades•
check the cutting depth limitations in separate
diagrams in Main catalogue.
Use the separate coolant adaptor for the tool•
block in order to achieve the best coolant
supply.
Reinforced blade.
Practical hints
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Face grooving shank
holdersIntended for face grooving applications.
Available in 0° and 90°, right and left hand
style versions covering a large area of first
cut diameters.Covers first cut diameter from 34–400 mm.
All made in B-curved version, A-curved ver-
sion to be ordered as Tailor Made or use the
modular CoroCut SL system where both A-
and B-curved blades are available.
Q-Cut toolholder type 151.37 offers a pro-
gram of 0° and 90° covering first cut from
24–200 mm. Also internal face grooving bars
with first cut down to 18 mm are available.
min.
max.
First cut diameters.
0° face grooving
shank holder.
L
L
AR
B
L
A
RB
B
AR
B
R
L
A
0°
0°
90°
90°
The first cut must be made within the min. and max. limits for the holder, see the Main•
catalogue or separate marking on the holder.
Always start from the outer diameter and move towards the centre.•
Choose the correct tool (A or B sweep, right or left hand style) depending on your•
machine set-up and workpiece rotation. See the following illustration.
Practical hints
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Angled shank holdersIntended for profiling and shallow undercut-
ting applications. Available in 7°, 45° and 70°,
right and left hand style versions. Developed
specifically for aluminium rim machining.
70° angled holder.
Shallow groovingholder.
Holder seat size Inser t seat size Max depth of cut ar
, mm
G E, F, G 3.5
K H, J, K 4.5
Shank holders for
shallow groovingThese holders are universal for all shallow
grooving and face grooving applications.
They are often the only solution when Tailor
Made inserts with complicated shapes are
used. One seat size can take inserts which
normally have other seat sizes up to a limited
cutting depth (ar).
Available in 0° and 90°, right and left hand
style holders.
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Profiling bar. Grooving bar.
Internal barsIntended for internal grooving applications.
Available in right and left hand style bars
from 16 to 50 mm diameter. These bars are
equipped for internal coolant.
Also 20° angled bars for internal profiling
are available.
Bars up to 25 mm diameter are cylindrical
and designed to be used in EasyFix sleeves.
Bars above 25 mm diameter have flats.
Always mount the bars with shortest possible overhang in order to avoid vibration and•
deflection.
Apply large amounts coolant in order to both cool down the insert and also help chip•
evacuation and avoid breakage.
Use EasyFix sleeves to achieve the best set-up, avoiding vibration and giving correct centre•
height and cutting angles.
Practical hints
CoroCut3 holdersIntended for economical shallow parting and
grooving in mass production. Available inright and left hand styles, Coromant Capto
(C3/C4) and shank holder versions from
sizes 1010 to 3232.
CoroCut3 holder.
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Coolant solutions.
The CoroCut SL systemA universal modular system. Intended mainly for internal grooving and external face groov-
ing applications. Focused on Coromant Capto set-ups.
Consists of straight and face grooving blades for external and internal use. Blades for•
CoroCut, Q-Cut 151.3 and 151.2 available.
- CoroCut for face grooving and grooving applications- CoroCut 3 for economical grooving
- Q-Cut 151.3 for small internal diameters
- Q-Cut 151.2 for deep grooving
- CoroCut XS for precision grooving
Adaptors in 0° , 90° and 45° styles in Coromant Capto and shank holder versions.•
Always mount the bars with shortest possible overhang in order to avoid vibration and•
deflection.
Possibility to mount blades on 570 adaptors, both solid steel and damped bars, in order to•
avoid vibration.
Blades with a coolant connector allow cutting fluid to be concentrated at the back of the•
insert, see drawing below.
Adaptors making it easy to fit coolant tubes both over and under the blades, see drawing•
below.
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Left hand tool = left hand adaptor+righthand cutting blade
Right hand tool = right hand adaptor+lefthand cutting blade
Left hand Right hand
Right hand Left hand
A curveA curve
B curve B curve
Neutral
90° 90°
90° 0° 45° 0° 0° 45° 0° 90°
Left hand Right handNeutral
Other CoroTurn®SL - cutting heads
Left hand
CoroCut®SL blades CoroCut®SL blades
Right hand
Left hand tool =left hand adaptor+left
hand cutting blade
Right hand tool =right hand adaptor+righthand cutting blade
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90° mounting•
It is very important that the insert is mounted at 90° to the centre line of the workpiece
in order to obtain perpendicular surfaces without scratch marks and to reduce the risk of
vibration.
Cutting luid•
A large supply of cutting fluid, directed exactly on the cutting edge or under the edge,
should be used while the insert is engaged and throughout the operation.
Inserts mounted at 90° to the
centre line of work piece.
±0.1 mmCorrect centre height settings•
It is essential when parting bars and
grooving relatively small diameters, that
the centre height setting is maintained to
a tolerance of ±0.1 mm. This has a major
influence on tool life, cutting forces andpip size.
Practical hints
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CoroCut MB for internal machining(Diameter area from 10 mm)
CoroCut MB is a high precision grooving,
turning and threading system for for machin-
ing min. 10 mm diameter holes. The edge
line of the insert is sharp and together with a
thin-layered coating it is suitable for internalmachining.
The insert is mounted with a screw from the front position in three grooves for safe and sta-
ble mounting.
The system has two insert sizes dedicated to different bore diameter. Boring bars are designed
with a oval cross section for maximal stability and are available in steel and carbide bars.
Application Size 07 Size 09
Min hole 10 mm Min hole 14 mm
Grooving
Turning
–
Threading–
Face grooving–
The steel bars for overhang up to 3 x D and
the carbide up to 5.5 x D.
For accurate machining with less vibration
and precise centre height of the insert, use a
cylindrical bar with Easy-Fix sleeves.
The CoroCut MB system includes different types of inserts for a wide range of applicationsi.e. grooving, face grooving, profiling, preparting as well as turning and threading.
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Grooving
Grooving width from 0.7–3.0 for general grooving and circlip grooving.
Profiling
Round insert styles for internal profiling and grooving available in widths from 0.8–3.0 mm.
Face grooving
Face grooving is available for hole diameters from 12 mm and width from 1–3 mm. The max-
imum cutting depth for these inserts is 5 mm.
Preparting
Inserts for producing a 45° chamfer inside the bore before parting off the component are
available.
Recommended grade and cutting data
Grade GC1025. Cutting speed VC = 100 m/min and feed 0.025 mm/r.
= Recommendedstarting value.
GroovingInsert width (la),mm
Feed (f n),
mm/r0.01
0.7- 1.0
0.0015 0.020 0.025 0.030
1.2- 1.5
1.7- 2.0
2.5
3.0
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The insert is front mounted and posi-
tioned in three grooves for safe and stable
mounting.
The tool has four insert sizes for different
hole diameters.
The milling cutters are available in steel and
carbide Weldon shanks in two diameters
12 mm and 16 mm and for overhangs from
15 mm up to 85 mm. All milling cutters are
equipped with through coolant for improved
chip evacuation.
CoroMill 327 – grooving cutter for milling
applicationsCoroMill 327 is a sharp precision ground milling tool for grooving and threading machining
into min 10 mm diameter holes. CoroMill 327 should be used for holes with circular interpo-
lation but also for longitudinal milling.
The insert program covers inserts for general grooving and circlip widths from 0.7–5.15 mm.
Concept Insertsize
Min. holesize/outercutter diam.
Max,depthof cut
Component groove width
2.50 2.65 3.00 3.15 4.00 5.15
327 06091214
10182228
1.53.54.56.5
****
*
****
****
*
***
* *
328 1339, 44, 63, 80
5.0 * * * * *
Concept Inser tsize
Min. holesize/outercutter diam.
Max,depthof cut
Component groove width
0.70 0.80 0.90 1.00 1.10 1.30 1.50 1.60 1.85
327 0609
1214
1018
2228
1.53.5
4.56.5
* * * * **
**
**
**
**
* *
328 13 39, 44, 63, 80 5.0 * * *
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CoroMill 328 is used for internal and exter-
nal circlip grooves and with diameters over
39 mm. CoroMill 328 has one insert size for
circlip widths from 1.3–5.15 mm.
CoroMill 328 comes with Weldon, arbor
or bore with keyway mounting in 4 diam-
eters from 39–80 mm and 3–8 inserts with 3
indexable cutting edges for high productive
economic machining. Sharp cutting edges
generate high quality grooves with depth up
to 5.0 mm.
Recommended grade and cutting data
Starting grade GC1025.
Cutting speed 250m/min and feed per tooth f z 0.04 mm.
For more cutting data, see the Main catalogue.
CoroMill 328 – grooving cutter for milling
applications
Be aware, the CoroMill 327 inserts do not fit MB tools and vice versa.•
For new toolholders, preload the tip-seat by mounting and or remounting the insert a few•
times prior to cutting.
Recommended grade and cutting data
Starting grade GC1025.
Cutting speed 250m/min and feed per tooth f z 0.04 mm.
For more cutting data, see the Main catalogue.
Practical hints
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GradesTo cover all types of workpiece materials the CoroCut family has a variety of different car-
bide grades - from the highly wear resistant GC3115 to the toughest grade on the market
GC2145. Cubic boron nitride (CB7015) and diamond (CD10) tipped inserts are also avail-
able.
These grades have been developed to cope with the most complex of parting and groovingapplications.
It is important to detect if the grade is too wear resistant (hard) or too tough (soft), by
inspecting the edge line behaviour.
Edge line having early plastic deformation (PD), see the illustration, indicates the grade is too
tough and a more wear resistant grade should be used.
Edge line having early chipping (small carbide pieces broken out of edge line), see the illustra-
tion, indicates the grade is too wear resistant and a tougher grade should be used.
See also the different wear mechanisms on page 76.
Plastic deformation. Chipping.
T o u g h n e s s
W e a r r e s i s t a n c e
U n s t a b l e
S t a b l e c o n d i t i o n s
Practical hints
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The different grades
Grade GC3115
Based on a hard substrate, MT-CVD coated with TiCN-Al2O3 layer.
A high wear resistant grade for grooving and turning applications under stable conditions.
Also effective in hard steels.
High cutting speeds.
Grade GC4225 – first choice for cast iron
Based on a hard gradient sintered substrate, MT-CVD coated with TiCN-Al2O3-TiN layer
(black and yellow).
An all-round grade for ISO-P and ISO-K with excellent combination of high wear resistance
and good edge security. To be used in grooving, turning and parting-off operations under
stable conditions.
Medium to high cutting speeds.
Grade GC1125 – the universal grade
A fine grained substrate, PVD-coated with TiAlN layer.
An excellent all-round grade in all ISO-areas. First choice for parting-off tubes, grooving and
turning operations and works well in low-carbon and other smearing materials.
Low to medium cutting speeds.
Grade GC2135 – first choice for stainless steel
A MT-CVD-coated grade with TiCN-Al2O3-TiN layer.
A grade for toughness demanding operations such as parting-off to centre and interrupted
cuts.
Low to medium cutting speeds.
Grade GC2145
The markets toughest substrate, PVD coated with TiAlN layer.
For extremely toughness demanding operations, such as interrupted cuts and parting-off to
centre in stainless steel.
Low cutting speeds.
Grade S05F
MT-CVD-coated TiCN-Al2O3-TiN layer at a fine grained carbide substrate. For roughing
to finishing in HRSA-materials.
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Grade GC1005
A fine grained carbide substrate, PVD coated with TiAlN layer.
Most suitable for roughing of aluminium.
Grade H10
Uncoated carbide grade.
Good edge sharpness for use in aluminium alloys and Heat Resistant Super Alloys (HRSA).
Grade H13A – first choice for non-ferrous materials
Uncoated carbide grade.
Good wear resistance and toughness combined with edge sharpness.
To be used in non-ferrous and titanium materials.
Grade GC1105 – first choice for HRSA
A fine grained carbide substrate, PVD coated with TiN-TiAlN layer.
A wear resistant grade combined with sharp edges. To be used for finishing with close toler-
ances in HRSA and stainless steel.
Grade CD10 – first choice for finishing aluminium
A polycrystalline diamond (PCD) grade.
An extremely wear resistant grade giving very good surface finish. To be used only for non-
ferrous materials.
Grade CB7015 - first choice for hardened materials
High performance cubic boron nitride composite for hardened ferrous materials.
Suitable for both continious and interupted cuts.
Grade CB20
A cubic boron nitride (CBN) grade.
A wear resistant grade. To be used for machining of hardened materials, with limited feed
and depth of cut. Eliminates grinding operations.
Other grade information
Grade 1025
A fine grained substrate, PVD coated with TiAlN layer.
An excellent all round grade for all ISO-areas. The thin coating makes it suitable for sharp
edges.
Low to medium cutting speeds.
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The recommendations are valid for use with cutting fluid.•
Note! For internal grooving, face grooving and undercutting the•
speed should be reduced by 30–40%.
ISO CMC Material Brinell GC3115 GC4225 GC1125
Feed f n’ mm/r
0,05-0,5 0,05-0,5 0,05-0,5
Cutting speed v c’
m/min
P 01.2
02.2
Unalloyed
Low-alloy ≤5%
150275
330-140270-105
315-140265-100
265-115205-95
M05.11
05.21
15.51
Ferritic/ martensitic
Austenitic
Austenitic-ferritic
(Duplex)
200180230
190-85215-100155-75
K 08.1 Grey 180 290-140 275-130 210-110
ISO CMC Material Brinell CD10 GC1005 GC1125
Feed f n’ mm/r
0,05-0,5 0,05-0,8 0,05-0,8
N 30.11
33.2
Aluminium alloys
Copper and copper alloys
6090
2650-265750-75
2400-240630-65
1900-190500-50
ISO CMC Material Brinell S05F GC1105 GC1125
Feed f n’ mm/r
0,05-0,3 0,05-0,3 0,05-0,3
S20.11
20.21
20.31
23.21
Iron base
Nickel base
Cobalt base
Titanium alloys1)
200250200950 Rm2)
200-135100-60100-65
180-12090-5590-60
80-4550-3255-3880-45
ISO CMC Material Brinell CB7015 CB20
Feed fn’ mm/r
0,05-0,1 0,05-0,1
H04.1
10.1
Extra hard steel
Chilled
60 HRC
400
145-135 125-120
200-195
Cutting data recommendations
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1) Positive cutting geometry and coolant should be used2) Rm = ultimate tensile strength measured in MPa.
For more cutting data information pleasecheck in the Main catalogue.
ISO P = Steel, ISO M = Stainless steel, ISO K = Castiron, ISO N = Aluminium and non-ferrous materials, ISOS = Heat resistant super alloys and titanium, ISO H =Hardened materialsCMC = Coromant material classification
GC2135 GC2145 GC1105
0,05-0,5 0,05-0,5 0,05-0,5
180-75155-70
160-65140-60
145-65165-70115-55
130-50140-55105-45
400-175435-190
H10 H13A
0,05-0,8 0,05-0,8
2250-225630-65
1900-190500-50
GC2135 GC2145 H13A
0,05-0,3 0,05-0,3 0,05-0,3
50-2940-2645-28
40-3025-2030-20
50-3730-2335-2770-60
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Wear mechanism – Trouble shootingCareful observations
To achieve best possible economy regarding tool life, workpiece quality and optimised cut-
ting data careful observations of the insert edge have to be made.
At low speed built-up edge (BUE) and chipping are the main problems, at high speeds plastic
deformation (PD), flank wear and crater wear are the problems.
Cause
Cutting edge temperature too•
low.
Unsuitable geometry or grade.•
Solution
Increase cutting speed and/•
or feed.
Choose a geometry with a•
sharper edge. Preferably a
PVD coated grade.
When parting to centre and in stainless material it is almost impos-
sible to avoid BUE. It is important to minimise this phenomenon byusing the solutions above.
Cause
Too hard grade.•
Too weak geometry.•
Unstable conditions.•
Too high cutting data.•
Solution
Choose a softer grade.•
Choose a geometry for higher•
feed area.
Reduce overhang. Check cen-•
tre height.
Reduce cutting data.•
Chipping/breakage
Built-up edge (BUE)
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Cause
Excessive temperature in cut-•
ting zone.
Unsuitable grade.•
Lack of coolant supply.•
Solution
Reduce cutting speed and/or•
feed.
Choose more wear resistant•
grade.
Improve coolant supply.•
Plastic deformation (PD)
Cause
Cutting speed too high.•
Too soft grade.•
Lack of coolant supply.•
Solution
Decrease cutting speed.•
Choose more wear resistant•
grade.
Improve coolant supply.•
Flank wear
Cause
Cutting speed too high.•
Too soft grade.•
Feed too high.•
Lack of coo• lant supply.
Solution
Decrease cutting speed.•
Choose more wear resistant•
grade.
Decrease feed.•
Improve coolant supply.•
Crater wear
Cause
Oxidation at the cutting depth.•
Too high edge temperature.•
Solution
Use varying cutting depths.•
Reduce cutting speed.•
Notch wear
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1 2 3 4 5
6 7 8 9 10
11 12 16 17
Grooves are often designed in many different shapes and dimensions depending on the
working area. With Tailor Made tools you can increase the productivity and make it possible
to generate grooves not possible with standard tools.
We tailor inserts and toolholders to suit your specific component requirements.
Contact your Sandvik Coromant representative for a quick quotation and competitive price
and delivery.
InsertsFor inserts choose suitable shape option (see below) plus actual dimensions according to
Main catalogue.
Tailor Made
Insert shape options
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ToolholdersBoth conventional toolholders and
Coromant Capto are available in different
styles and for different applications.
When grooving within mass production and when the groove•
needs to be chamfered, the option 16 will reduce the cycle time by
up to 50%, if Tailor Made inserts are used.
Tailor Made toolholders with optimized a• r (min length) for the
component, will make it possible to use higher cutting data and
longer tool life. All together this will give a better productivity.
Reinforced blades optimised after bar size diameter, will achieve•
higher cutting data and longer tool life within parting off. This will
give a higher productivity.
CoroCut and T-MAX Q-Cut
for parting and grooving
Shankholders
CoromantCapto
Tooldesign
Holderstyle
Clampingsystem
Machine limi-tations
Reinforced bladeparting
Reinforced bladeface grooving Blade type Copy angle
R
N
L
F
G
Practical hints
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CoroCut insert blanksStraight blanks for “Do it yourself grinding” are available in 9 widths from 2.3–11.6 mm.
These blanks have a flat top which allows grinding to many different shapes.
90º blanks in R/L versions are also available, mainly for use in the aerospace industry.
When grinding, a standard toolholder is suitable as a grinding fixture, and recommended set-
ting angles for the grinding wheel are shown in the drawings below.
Grinding wheel properties
Grain size: US Mesh 170-240 (75–55 mm).
Binder: Metal
Concentration: 75–100
Solutions for different products and applications can be made, see the following example.
Straight insert blank. 90° angled insert blank.
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Special productsFor even more complicated products our special tool design facility are able to produce
inserts and toolholders to suit very specific requirements.
Contact your Sandvik Coromant sales person for more details.
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