Scraper Bar Attachments_Chainconveyor

8/17/2019 Scraper Bar Attachments_Chainconveyor

1/7

Figure 8:

Hardness curves for attachments

HEKO offers a wide spectrum of

cost effective and safe scraper bar

attachments. HEKO's attachments

are suitable for single or multi-strand

conveyors.

Heat treatment of the attachments

is tailored to suit individual require-

ments. We recommend the use of

tempered HEKO qualities for high

strength requirements, and case

hardened HEKO qualities for wear

resistant requirements. The conveyor

chains can be supplied as individual

components are pre-assembled to

form an endless chain.

Generally there are two categories of

attachments, those which connect

the chain links and those which are

inserted into the chain strands.

We will be pleased to assist you in

selecting the optimum attachment

for your application.

HEKO scraper bar attachments

■ The right solution for every

application

■ Several options to suit indivi-dual requirements

■ Tempered and case hardened

■ Finish self-colour, galvanised

or other surface finishes

3.0 Scraper bar attachments

Figure 9:

Automatic hardness tester (Protocolling

of hardness values and hardness curve)

tempered qualities hardened contact area qualities case hardened qualities

heat-treatable steel CrNi-/CrMo-steel heat-treatable steel CrMo-steel CrNi-steel CrMo-steel

HEKO 31 HEKO 32 HEKO 4/1 HEKO 4/2 HEKO 5 HEKO 6

proof stress 250 300 125 240 150 240

N/mm2

breaking stress 500 600 280 400 3704) 450

N/mm2

contact surface hardness 300 330 600 600 750 600

min. joint HV 1

hardening depth d- min. - - 0,11) 0,11) 0,11) 0,141)after etching

hardening depth d min. - - 0,06 0,06 0,06 0,09

Eht2) Rht3) 550 HV 1

1) tolerance …d 0,01d 2) Eht = case hardening depth

3) Rht = effective hardening depth 4) tolerance - 10% ≥ t =105 = -20%

7 H E KO

3.1 Technical data for attachments

Table 3: Technical data for HEKO qualities


2/7

8,5

12,5

13

17

13

17

17

17

17

17

18

18

21

18

21

10 x 35

13 x 45

14 x 50

16 x 56

16 x 64

18 x 63

18 x 64

19 x 75

20 x 56

20 x 70

20 x 80

22 x 86

23 x 80

23 x 100

26 x 91

764

764

WN

764

WN

764

WN

WN

766

764

WN

WN

764

WN

764

1765

1765

21641

1765

4282

1765

1081 B

3169 A

1765

1765

3167 A

3983

1765

2151

1765

0,25

0,50

0,60

0,90

1,00

1,15

1,15

1,20

1,25

1,30

1,50

1,90

2,00

2,15

2,90

M 8 x 45

M 12 x 55

M 12 x 60

M 16 x 75

M 12 x 70

M 16 x 80

M 16 x 80

M 16 x 80

M 16 x 90

M 16 x 90

M 16 x 90

M 16 x 90

M 20 x 90

M 16 x 90

M 20 x 100

82

100

104

130

130

125

125

125

145

145

124

140

164

137

170

55

71

78

88

96

99

100

113

96

110

120

132

126

146

143

14

18

17

18

20

24

24

23

25

27

23

26

31

30

35

12

15

16

20

20

19

19

20

22

22

22

25

24

24

31

10

12

13

16

16

20

20

20

20

20

20

20

20

20

22

22

28

33

32

32

35

35

35

30

35

40

50

42

48

45

40

50

58

70

70

65

65

65

85

85

68

80

89

78

95

30

35

30

40

40

40

40

40

40

40

35

40

50

40

50

12

15

16

20

20

20

20

20

20

20

21

20

25

19

25

30

34

36

50

50

45

45

45

65

65

54

62

63

60

65

63

106

123

160

160

203

203

227

251

251

251

304

332

332

424

58

98

114

148

148

188

188

210

232

232

232

281

307

307

392

44

74

77

112

100

127

127

141

157

157

157

190

232

207

297

94

159

185

241

241

305

305

340

376

376

376

456

498

498

637

78

132

154

201

201

254

254

283

314

314

314

380

415

415

530

3.2 Special scraper attachment type SP

Figure 10: HEKO Special scraper

attachment type SP

HEKO special scraper attachmentsare suitable for use with single- and

twin-strand conveyors. They can be

fitted to conveyors with wheels

having projecting teeth, pocket

teeth or toothless wheels.

Scraper centres can be varied by

means of the number of chain links

fitted. Supply can be either loose or

pre-assembled with the attachments

and scraper bars.

We recommend the use of high

tensile bolts for attaching the scraper,

grade 8.8 minimum. Chains which

have lengthened as a result of wear

can be shortened by unbolting onescraper and removal of one (set)

chain length and attachment.

Individual chain links can be removed

by cold cutting of the link. Both

tempered and case hardened attach-

ments are part of HEKO's standard

manufacturing programme.

The quality of the attachments is

matched with the chain quality. All

necessary fittings as well as suitable

scraper bars, standard or bespoke,

can be furnished by HEKO.

HEKO special scraperattachments type SP are

supplied to suit chain to

DIN or other standards.

■ suitable for horizontal and

inclined conveyors

■ conveying in upper or lower

trough

■ simple and economic scraper

attachment

e

a

c

t

d

k

h i

g

f

b

l

j

H E KO 8

HEKO qualities *), MBK (kN)tempered hardened

contact areas

HEKO HEKO HEKO HEKO HEKO

31 32 41 5 42

*) stated values refer to use of bolts and nuts grade 8.8, WN = works standard, MBK = min. breaking load, tolerance: table 1

to suit chain, chain HEKO dimensions/mm bolts/nuts weightnominal DIN drawing kg/each

diameter number

x pitch,

d x t/mm a b c e f g h i j k l

Table 4: HEKO special scraper bar attachments for chains to DIN or works standard


3/7

3.3 Chain shackle type TS and DIN 5699

HEKO shackles are fastened to the

scraper bar by two nuts and a

securing element. Shackle and

scraper bar form a stable, simple

form of connection. A wide range of

sizes and qualities is available to suit

most applications.

We recommend our shackle type TS

for higher demands as the lip on the

distance plate provides support on

the wheel rim.

In addition the TS-shackle permits

a much higher breaking load

compared to the DIN-shackle.

TS-shackles can be used with wheels

having projecting teeth and pocket

teeth. Plain wheels can be used as

return idlers.

Figure 11: HEKO shackle type TS

Figure 12: Scraper connected by shackleto DIN 5699

HEKO shackle type TS

■ Supplied also pre-assembled

with the chain to endless

chain strands

■ Highest services achieved

through the reliability of the

secured TS-distance plate

HEKO

h1

h

d1

d3

b2

t D

L

d2

l

HEKO

d1

h

a

d2

b2

S

B

D

L

t

l

9 H E KO

HEKO shackle to DIN 5699

■ Simple to fit

■ Dimensions to suit chain to

DIN 764

Table 5: Dimensions and qualities of HEKO shackle type TS

tolerance: table 1, MBK = min. breaking load

pitch to suit chain, weight dimensions/mm HEKO qualities

t/mm nominal kg/each tempered hardened

diameter x complete contact areas

pitch/DIN HEKO 32 HEKO 6

b2 d2 d3 d1 h h1 D L l MBK (kN) MBK (kN)

45 13 x 45 / 764 0,53 14 14 5 M 12 64,5 40,5 37 75 26 159 119

56 16 x 56 / 764 0,70 16 16 5 M 14 68 40 45 95 28 241 180

63 18 x 63 / 764 1,00 18 18 5 M 16 74 43 50 110 34 305 228

70 20 x 70 / 764 1,45 20 20 5 M 20 83 48 55 120 37 376 280

80 23 x 80 / 764 1,85 23 23 5 M 20 92 53 60 130 37 498 360

91 26 x 91 / 764 2,70 26 26 6 M 24 104 60 70 155 42 636 477

105 30 x 105 / 764 3,90 30 30 6 M 24 118 68 80 165 42 847 635

126 36 x 126 / 764 6,10 35 35 8 M 30 139 81 85 200 66 1220 915

136 39 x 136 / 764 7,60 39 38 8 M 36 152 88 90 220 79 1432 1074

147 42 x 147 / 764 9,00 40 40 8 M 36 162 93 95 230 79 1661 1188

Table 6: Dimensions and qualities of HEKO shackles to DIN 5699

pitch to suit chain, weight chain shackle distance plate HEKO-qualities hardened

t/mm nominal kg/each dimensions/mm dimensions in mm tempered contact areas

diameter x complete b2 d2 d1 h a l L D S B HEKO31 HEKO32 HEKO41 HEKO5

pitch/DIN MBK (kN) MBK (kN)

35 10 x 35 / 764 0,21 10 12 M 10 43 23 13 65 30 12 10 ,5 78 94 54 68

45 13 x 45 / 764 0,34 13 15 M 12 53 28 18 75 30 12 13 132 159 88 110

56 16 x 56 / 764 0,59 16 18 M 14 64 34 23 95 40 12 15 201 241 129 162

63 18 x 63 / 764 0,85 18 21 M 16 71 37 25 110 40 15 17 254 305 170 213

70 20 x 70 / 764 1,25 20 23 M 20 80 42 30 120 50 15 21 314 376 207 259

80 23 x 80 / 764 1,50 23 26 M 20 89 47 30 130 50 15 21 415 498 269 337

91 26 x 91 / 764 2,36 26 29 M 24 99 52 35 150 60 20 25 530 637 339 424

105 30 x 105 / 764 3,06 30 34 M 24 114 60 35 165 60 20 25 706 848 458 574

126 36 x 126 / 764 5,40 36 40 M 30 134 71 45 200 70 20 31 1017 1221 646 810

136 39 x 136 / 764 7,81 39 44 M 36 146 76 50 220 80 25 37 1194 1433 771 950

147 42 x 147 / 764 8,83 42 47 M 36 157 81 50 230 80 25 37 1385 1662 887 1110

Other shackles to DIN 745 or out of DIN available, tolerance: table 1, MBK = min. breaking load


4/7

3.4 Split scraper attachment type BG 22

Figure 15: Split scraper bar attachments Figure 16: Split scraper bar attachment

for triple strand chain

HEKO attachments are drop forged,

tempered and chain contact surfaces

are case hardened to minimise wear.

They are employed for single and

multi-strand applications for securing

the scraper bar in the middle und

thus provide additional strength and

security. These attachments can run

over pocket toothed wheels with

single or twin strand conveyors and

with special scraper bar designs also

over wheels with projecting teeth.

The two attachment halves each

have two holes and a pair will be

connected with the scraper bar by

two bolts and nuts grade 8.8. or

12.9.

Figure 13: Arrangement for pocket

toothed chain wheels

Figure 14: Arrangement for wheels with

projecting teeth or toothless wheels

e

a

g

t

d

f

i

k

c

bmin

e

f d

a

3.5 Lift-in scraper bars type EFS

■ Their use is limited to wheels

with pocket teeth

■

Suitable scraper bars can besupplied

■ Single piece or for bolted

attachment

H E KO 10

Figure 17:

Lift-in scraper bars type EFSTable 8: Lift-in HEKO scraper bars type EFS

to suit chain, DIN dimensions/mm

nominal diameter chain

x pitch, d x t/mm a bmin c e f d

14 x 50 WN 20 50 25 13 50 70

16 x 64 WN 30 55 28 17 70 90

19 x 75 WN 35 65 32 17 75 95

22 x 86 WN 40 75 37 21 85 105

26 x 91 764 35 95 47 21 90 110

30 x 105 764 40 110 55 21 95 120

to suit chain, DIN weight bolts/nuts dimensions/mm case hardened HEKO qualities

nominal diameter chain kg/each HEKO 41 HEKO 42

x pitch, d x t/mm a e f g i k MBK kN MBK kN

10 x 35 764 0,30 M 10 x 45 95 12 10 22 70 45 29 47

10 x 50 762 0,35 M 10 x 60 95 27 10 22 70 45 29 4713 x 45 764 0,40 M 12 x 55 120 12 13 28 85 60 50 80

13 x 65 762 0,45 M 12 x 75 120 32 13 28 85 60 50 80

16 x 56 764 0,70 M 16 x 65 140 12 16 32 100 70 75 120

16 x 64 WN 0,80 M 16 x 75 140 20 16 32 100 70 75 120

18 x 63 764 0,80 M 16 x 70 145 15 18 35 105 75 95 153

18 x 64 764 0,90 M 16 x 75 145 16 18 35 105 75 95 153

20 x 70 764 1,00 M 16 x 75 150 15 20 35 110 80 118 188

20 x100 762 1,10 M 16 x 110 150 45 20 35 110 80 118 188

23 x 80 764 1,60 M 20 x 90 175 20 23 40 130 85 155 249

Table 7: HEKO split scraper attachments type BG 22

Other dimensions and qualities on request, WN = works standard, tolerance: table 1, MBK = min. breaking load

Other dimensions and qualities on request, WN = works standard


5/7

3.6 Plug-in scraper bar attachmentstype SMG and SMO

HEKO plug-in attachment

■ Fast connection to endless chain strands

■ Different scraper bar centres possible

■ Reversible conveying possible

■ High service life even under extreme conditions

■ Fitted to loose chain

Figure 18:

HEKO plug-in attachment SMG

HEKO plug-in attachments SMG are

drop forged in one-piece with the

base plate.

The attachments are manufactured

from manganese-chrome-alloy steeland are completely case hardened.

Connection of the attachment with

the scraper is by use of bolts grade

8.8.

Figure 19:

Plug-in attachment SMO

HEKO plug-in attachments SMO are

drop forged and are used without

base plate. They are suitable for

welding directly to the scraper bar.


from manganese-chrome-alloy steel

and are completely case hardened.

f m

a

b

e

c

h


from manganese-chrome-alloy steel

and are case hardened.

The connectors can easily be welded

to mild steel and low alloy steel. The

following are suitable welding alloys:

MAG: DIN 8559/SG3, E: DIN 1913 E

5154 B10 or equal.

11 H E KO

b

c

h

a

e

welding area

14 x 50

16 x 64

19 x 75

22 x 86

26 x100

30 x120

34 x136

SMG

SMO

SMG

SMO

SMG

SMO

SMG

SMO

SMG

SMO

SMG

SMO

SMG

SMO

112

110

145

135

170

156

195

182

230

214

270

252

310

282

0,7

0,5

1,2

0,8

2,0

1,2

3,0

2,0

4,5

3,3

6,7

5,3

10,0

7,2

40

16

50

19

60

21

70

25

80

30

90

35

100

38

12

25

15

30

20

36

20

40

20

45

25

55

30

60

38

50

48

59

58

69

68

80

72

92

85

110

98

122

45

52

65

71

85

98

110

(M 12)

(M 16)

(M 20)

(M 20)

(M 20)

(M 24)

(M 27)

57

73

76

83

85

100

100

115

110

135

130

160

150

177

Table 9:

HEKO Plug-in attachment type SMG, forged with base plate

HEKO Plug-in attachment type SMO, forged without base plate

Plug-in to suit chain, nominal weight dimensions/mm

attachment type Diameter x Pitch, d x t/mm kg/each a b c e f m h

Other dimensions and qualities on request. Dimensions ( ) apply only for attachments with threads


6/7

3.7 Sliding block type GL

■ Suitable for horizontal and

inclined conveyors

■ Provide support for the

scraper bar

■ Guide for chain and scraper

bar

HEKO slide blocks prevent the chain

wearing in unwanted areas, resulting

in increased service for the chain.

The sliding blocks are available in

different material qualities such as

chrome molybdenum steel or cast

iron.

3.8 Attachment type BGQ

HEKO attachments BGQ are fitted to

single and multi-strand conveyors.They are suitable for pocket toothed

and projected teeth wheels.

Attachments type BGQ are available

as fabricated as well as drop forged

units. The chain contact surfaces are

case hardened. The angled flanges

include two holes each for fitting to

the scraper bar. The attachmentsBGQ are available in different

material qualities and are also

available to different dimensions.

Figure 20:

HEKO sliding block type GL

Figure 21:

HEKO attachment type BGQ

t ea c

d

b f

e f

td

g a

i

l

H E KO 12

to suit chain shackle, sliding block dimensions/mm weight

pitch t/mm Pitch t/mm a b c d e f kg/each

70 70 130 85 20 21 14 55 1,5

80 80 140 95 25 21 19 55 2,1

91 91 160 100 25 25 17 65 2,3

105 105 180 110 40 25 17 73 3,2

126 126 210 120 45 32 20 83 4,9

Table 10: HEKO Sliding Blocks

Other dimensions and qualities on request

Table 11: HEKO attachment BGQ

Other dimensions and qualities on request, WN = works standard, MBK = min. breaking load, tolerance: table 1

to suit chain, DIN weight bolts/nuts dimensions/mm hardened contact area qualities

nominal diameter chain kg/each HEKO 21 HEKO 42

x pitch, d x t/mm a e f g i l MBK (kN) (MBK kN)

13 x 65 762 0,3 M 12 x 60 26 25 10 18 30 12 ,5 66 77

16 x 80 762 0,5 M 16 x 70 31 30 10 20 40 14 ,5 100 120

20 x100 762 0,85 M 16 x 80 30 ,5 40 14 25 50 14 ,5 157 142

23 x120 WN 1,3 M 20 x 90 34 ,5 50 15 30 54 17 207 240


7/7

3.9 Scraper attachments for endless chain

Arrangements of replaceable,

bolted and welded attachments

for endless chain.

In addition to using chain ends and

special attachments for conveyors,

endless chain can also be used. Such

an arrangement has the advantage of

allowing different scraper bar centres

to be used. In addition the transport

unit can be tailored to individual

applications.

Below are some examples of

attachments for use with endless

chain strands. Other, bespoke

attachments can be provided to

suit the users’ application.

Figure 22: Individually welded

attachments for use with wheels with

projecting teeth, forged and case

hardened.

Figure 23: Lift-in scraper bars for use

with pocket toothed wheels

Figure 24: Plug-in attachments type EFL

with security pin

Figure 25: Welded attachments typeAFS

for pocket and projected toothed

wheels for bolting scraper and use in

single and twin strand conveyors

Figure 26: Welded attachment for use

in abattoir

Figure 28: Transport unit for loose

products, i.e. household waste.

Figure 29: Transport unit for forestry

products

Figure 30: Lower trough transport

medium for wagons

Figure 27: Welded attachment for

different transport units

Figure 31: Plate conveyor used as open

assembly conveyor for tools, etc.

Figure 32: Plate belt conveyor Figure 33: Reversible transport catch.

13 H E KO

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Scraper Bar Attachments_Chainconveyor