81X Chains ‘The Grain Chain’

Worldwide the most common running gear encountered is the American roller chain series 81X. This we therefore describe as the GRAIN CHAIN. It is always 2,609” pitch (66,27 mm). As duties have increased a demand for a heavy duty version and extra heavy duty version has developed. This has been achieved by increasing the height and thickness of the side plates, although maintaining the same gearing details. Where necessary therefore the heavier versions can be used to upgrade existing equipment. Flights are normally WT the welded version but John King uniquely offer BT style being bent integral produced to customer standards.


81X Chains ‘The Grain Chain’

81X Chains ‘The Grain Chain’

Chain
Number

P

Tensile Strength

Rollers

Plate

Pin

Overall Width

Diameter

Width

Thickness

Height

Diameter

Length

D2

L

S1

S2

H

D6

F1

IX

mm

kN

mm

JKR 81X

66.27

111

23

27

4

4

28.58

11.11

47.2

TBA*

JKR 81XH

66.27

176

23

27

7.94

5.56

31.75

11.11

58.2

TBA*

JKR 81XHH

66.27

186

23

27

7.94

7.94

31.75

11.11

63.5

TBA*

* Flight width IX to suit customer requirements.
Flight Options:
- WT denoted flight welded to side plate mid pitch,
- BT denotes flight bent integral with linkplate.