John King Chains

Round Link Steel Chains and accessories

Round link steel chains have become a proven standard in mining and have developed in the coal mining industry along with Long wall mining, a highly effective means of extraction, since the 1960s. Armoured face conveyors require a chain that will run over long distances and offer flexibility in operation. The main standard is covered by DIN 22252.

Round Link Steel Chains

Nominal size

Diameter

Pitch

Width

Gauge Length

d x t

d

Tolerance

t

Tolerance

Inside b1 min

Outside b2 max

5 x t

Tolerance

14 x 50

14

±0.4

50

±0.5

17

48

250

±1.0

18 x 64

18

±0.5

64

±0.6

21

60

320

±1.0

19 x 64.5

19

±0.6

64.5

±0.6

22

63

322.5

±1.0

22 x 86

22

±0.7

86

±0.9

26

73

430

±1.0

26 x 92

26

±0.8

92

±0.9

30

85

460

±1.0

30 x 108

30

±0.9

108

±1.1

34

97

540

±1.2

34 x 126

34

±1.0

126

±1.3

38

109

630

±1.3


Round Link Steel Chains and accessories
Elongation at test force 1.6% max. Total elongation at fracture 14% min. Fatigue test 70,000 cycles min.

Round Link Steel Chains

Nominal size

Reference number

Test force

Breaking force
WF DIN

Operating force
WF DIN

Breaking force
WF DIN+

Operating force
WF DIN+

Bend test deflection

Weight

d x t

TH

Min kN

Min kN

Max kN

Min kN

Max kN

mm

kg/m

14 x 50

1450TH

185

246

154

-

-

14

±1.0

18 x 64

1864TH

305

407

254

460

287

18

±1.0

19 x 64.5

1964TH

340

454

283

510

318

19

±1.0

22 x 86

2286TH

456

608

380

680

425

22

±1.0

26 x 92

2692TH

637

850

531

960

600

26

±1.0

30 x 108

30108TH

848

1130

707

1270

795

30

±1.2

34 x 126

34126TH

1090

1450

907

1640

1026

34

±1.3


Round Link Deep Case Hardened Chains

For use with abrasive material, or where excessive friction occurs case hardened chain may increase operational life considerably over that of standard chains.
Based on DIN 22252:2001 Round link steel chains. Additionally proof loaded and tested.

Round Link Steel Chains

Nominal
size

Ref.
Number

Pitch
nominal

Width

Test
force

Breaking
force

Weight

Inside min.

Outside max.

d x t

mm

min. kN

kg/m

14 x 50 CH

14/50/CH

50

16.5

47

74

128

4.1

16 x 64 CH

18/64/CH

64

20

55

96

160

5.1

19 x 75 CH

19/75/CH

75

22

63

135

225

7.6

22 x 86 CH

22/86/CH

86

26

75

183

304

9.5

26 x 100 CH

26/100/CH

100

31

87

255

425

13.3

30 x 120 CH

30/120/CH

120

36

101

340

566

17.5

34 x 136 CH

34/136/CH

136

39

113

425

710

23.8

Proof Strength 240 N/mm2, Breaking Force 400 N/mm2, Surface Hardness 800HV 40, Carburizing Depth 0.09d, Hardening Depth 0.05d, Material: chrome-Nickel Alloy Steel, All dimensions in mm.