YUNG TAI MACHINERY CO., LTD

TEL : +886-4-2485-2888FAX : +886-4-2483-9861E-mail : yungtai2888@gmail.comwww.yungtai.com

201705B

No. 188-35, Dongsheng Road, Dali District, Taichung City 412-52 Taiwan

CENTERLESS GRINDERwww.yungta i .com

PRECISION MANUFACTURING PERFECT DESIGN EXCELLENT QUALITY PROFESSIONAL SERVICE

G Wheel

G. Wheel R. Wheel

G. Wheel R. Wheel

Unlversal Joint

Diamond Dresser

R Wheel

Infeed Grinding

Thrufeed Grinding Thrufeed Grinding Forming Grinding

Infeed Grinding Infeed Grinding

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Precision Manufacturing / Perfect Design / Excellent Quality / Professional Service

YUNG TAI MACHINERY CO., LTD is a professional centerless grinder manufacturer,which producesfirst-class productswith precision assembly and manufacturing technologies, as well as outstanding equipment stability at areasonable price,basedon customers’ demands. In order to provide customers with a broader range of product choicesand services, the Company furtherengages in the researchand development of centerless grinders so that eachcenterless grinder passes strict quality inspectionand testing before leaving the factory.

the Company will continue to carry on the spirit of sustainable development and putting service foremost inits operation.

“PRECISION, PERFECTION AND EXCELLENCE”Upholding the philosophy of

Description of the grinding principles:The grinding method of the centerless grinder does not require jackingthe center hole, but supporting the workpiece with the carbide blade instead.It is composed of 3 parts:grinding wheel, regulating wheel and work rest blade.a. The grinding wheel smoothes the surface of the workpiece to achieve the required fineness. b. The regulating wheel drives the rotation and grinding speed of the workpiece; the distance between the guide wheel and the grinding wheel is the outer diameter of the processed workpiece. c .The work rest blade can support the workpiece during grinding, which allows the workpiece to rotate on the carbide blade surface while ensuring the horizontal movement of the workpiece.

Workpiece

Work rest bladeExamples of application

Dresser:The dressing device is made of high-grade cast iron (FC300) via precision grinding and scarping. The angle of the dressing device on the regulating wheel can be adjusted (±5º) during grinding according to the nature of the workpiece and actual requirements, so as to ensure a good contact surface between the workpiece and regulating wheel, and to achieve optimal straightness and surface precision.

The spindles of the grinding wheels and regulating wheels are made of high-quality alloy steel (SNCM-439) that has under-gone normalization, tempering, high-frequency and subzero treatments before the precision grinding, in order to improve product stability, prevent deformation and prolong service life.

Gearbox: The gearbox is made of high-grade alloy steel (SCM-415), with the gear surface and inner diameter having undergone precision grinding to help achieve the optimal abrasion resistance during gear operation, as well as to sustain heavy loads.

Product FeaturesSpindle:

Bottom slide:Λ-shaped slide rails and double wedge auxiliary guides are used for the bottom slide. The double Λ-shaped slide rails have undergonehigh-frequency hardening treatment and precision grinding, which can block out mud, while offeringa lightweight and precise structure.

Machine bed:The centerless grinder adopts a high-grade cast iron (FC300) lathe bed. Its internal stress is eliminated through appropriate heat treat-ment to ensure the durability of the machine.

Applicable industries: Automobile parts, damper, steering system, oil pressure valve element, aerospace components, medical application, precision bearing, high-precision machine parts, electronics, cutting tools, oil pressure and pneumatic system.

Applicable products: Starting shaft, transmission shaft, balance shaft, bolt, transmission parts, universal joint, ball screw, bearing component, bearing ring, camshaft, pinion shaft, valve, rolling element, axis parts, etc.

YTC-12Centerless Grinder

A B C D E F940 1350 1550 1650 102545

G H I J K625 490 550 490740 (mm)

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ModelStandard work rest (Dia.)Special work rest (Dia.)Grinding wheel size (Dia. x Width x Hole)

Grinding wheel speedGrinding wheel motorRegulating wheel size (Dia. x Width x Hole)

Regulating wheel speedRegulating wheel motorRegulating wheel tilt angleRegulating wheel swivel angleUpper slide feed graduation Upper slide micro-feed graduationLower slide feed graduationLower slide micro-feed graduation Dressing device graduation Hydraulic pump motor Coolant pump motor Machine dimensionNet weight / Gross weight

YTC-12Ø1 ~ Ø30 mmØ30 ~ Ø60 mmØ305 x 150 x Ø120 mm1950 R.P.M.7.5 HPØ205 x 150 x Ø90 mm20 ~ 337 R.P.M.(10 Steps)1HP +5° ~ -3°±5°3.5mm (Rev.) 0.05mm (Gra.)0.1mm (Rev.) 0.001mm (Gra.)7mm (Rev.) 0.05mm (Gra.)0.2mm (Rev.) 0.001mm (Gra.)1.25mm (Rev.) 0.01mm (Gra.)1HP1/8HP1650 x 1550 x 1350 mm1650 kgs / 1850 kgs

Specification

※We reserve the right to change the design and specifications of our products without further notice.

Unit:

A B C D E F940 1350 1550 1650 102545

G H I J K625 490 550 490740 (mm)

Unit:

www.yungtai.comYTC-12SServo motor type Centerless Grinder

Regulating wheel motor(Servo motor type Centerless Grinder series):Regulating wheel motor with Japanese servo motor.The servo motor provides control of speeds from 10 to 300R.P.M.. So that the worm and worm gear driven by the servo motor, thus reducing the vibration generated when grinding to achieve the best grinding effect.

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SpecificationYTC-12S Ø1~Ø30 mmØ30~Ø60 mmØ305 x 150 x Ø120 mm1950 R.P.M.7.5 HP Ø205 x 150 x Ø90 mm10 ~ 300 R.P.M. (10 Stepless)1.3KW servo motor+5° ~ -3°±5°3.5mm(Rev.) 0.05mm(Gra.)0.1mm(Rev.) 0.001mm(Gra.)7mm(Rev.) 0.05mm(Gra.)0.2mm(Rev.) 0.001mm(Gra.)1.25mm(Rev.) 0.01mm(Gra.)1 HP 1/8 HP1650 x 1550 x 1350 mm1600 kgs / 1800 kgs

ModelStandard work rest (Dia.)Special work rest (Dia.)Grinding wheel size (Dia. x Width x Hole)

Grinding wheel speedGrinding wheel motorRegulating wheel size (Dia. x Width x Hole)

Regulating wheel speedRegulating wheel motorRegulating wheel tilt angleRegulating wheel swivel angleUpper slide feed graduationUpper slide micro-feed graduationLower slide feed graduationLower slide micro-feed graduationDressing device graduationHydraulic pump motorCoolant pump motorMachine sizeNet weight / Gross weight

※We reserve the right to change the design and specifications of our products without further notice.

A B C D E F990 1650 2000 2300 146045

G H I J K920 750 550 7001300

www.yungtai.comYTC-18Centerless Grinder

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※We reserve the right to change the design and specifications of our products without further notice.

(mm)Unit:

13

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Standard Accessories

1 Grinding wheel and flange 2 Regulating wheel and flange 3 Standard thrufeed work rest andcarbide blade

4 5 6Standard infeed work rest andcarbide blade

Diamond dresser x 2 pcs Thrufeed safety pressing device

7 8 9Flange extractor x 1 set Thrufeed tank Cutting fluid tank and pump

10 11 12Front/rear baffle plate Oil tank and pump Work lamp

Leveling screw andleveling plate

14 Toolbox and tools x 1 set

Optional Accessories

1 2 3Magnetic separator Paper filter Vibratory feeder

54 66Hydrocyclone coolantseparator

Automatic loading device forthrufeed grinding

Automatic receiver forthrufeed grinding

7 8 9Profile template Long bar grinding device End face dressing device forgrinding wheel

10 11 12Balancing stand and arbor Automatic infeed devicedriven by hydraulic forinfeed grinding

Manual feeder forinfeed grinding

13 Ejector for infeed grinding