A & K Attachments
This is the most common type of attachment, generally used for fixing apron slats, rubber belts and buckets on elevators. The attachment offers a platform parallel to the chain axis, usually containing one or two holes for attaching additional components. A1 and K1 attachments offer one hole, while A2 and K2 attachments offer 2 holes in the platform. ‘A’ generally designates an attachment on only one side of the chain, while ‘K’ designates that the attachment is on both sides of the chain. The spacing of the attachment is usually designated after the attachment type and number of holes. For example, a platform attachment on both sides of the chain with two holes, every fourth pitch, would be designated K2-04.
For large batches of chains where investment in special tooling is cost effective, the attachments form an integral part of the link plate, being bent over at 90 degrees. For higher strength conveyor chains, small quantities or non standard attachment heights, separate attachments are fitted to the chain by either welding, riveting or bolting. In order to bolt an attachment to solid pin conveyor chain, a special extended bolted bearing pin is used.