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Reverse Barrel Wide Series Drag Chains

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The standard wide series welded steel drag chain is designed to travel narrow end forward. In considering the offset sidebar style this direction of travel will create additional friction between the gearing face of the barrel and the tooth flank of the driving sprocket (fig.1). This condition is accentuated on short centred conveyors where the frequency of barrel and sprocket interaction is increased.

A simple solution was seen in the introduction of the RB series where the barrel is reversed to allow the chain to run open end forward. In this event instead of the articulation occurring between barrel and tooth flank it occurs inside the internal area where the pin will rotate within the barrel (fig. 2). This is preferable since the components are specifically suited to contact between two hardened bearing surfaces along the full width of the chain.

We therefore recommend RB series when centres are short and loads heavy where the typical failure mode is breaking chain barrels or welds.

Reverse Barrel Wide Series Drag Chains
Articulation is Between Pin and Barrel
Reverse Barrel Wide Series Drag Chains - drawing

JK Welded Steel Drag Chains

Chain
Number

P

Breaking
Load

Average
Weight

Over-All
Width

Between
Sidebars

Sidebars

Rivet.
Diameter

Length of Bearing

Thickness

Height

F1

L

S

H

D6

B

inches

lbs

lbs/ft

inches

WDH110

6.13

55,000

12.00

11.75

9.00

0.38

1.50

0.75

10.25

WDH116

8.12

59,000

18.50

15.50

13.00

0.38

1.75

0.75

14.13

WDH480

8.16

79,000

18.00

14.50

11.20

0.50

2.00

0.88

12.75

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