2.3.4 SK Attachment
SK attachments are made by installing SA attachments on both sides of the chain. They are called SK-1 or SK-2, depending on the number of bolt holes on one side. The attachment interval can vary the same as the A attachment (Figure 2.24).
Usually SK attachments are used with dogs or jigs (Figure 2.25). SK attachments are strong enough to stand up to bending or twisting forces.
The return side of SK attachment chains cannot be supported by guide rails on the rollers like A or SA attachment chains. The return must be slack or supported in some other manner.
Figure 2.24 SK-1 Attachments
Figure 2.25 SK Attachments May Be Used with Dogs or Jigs