Front View	Side View

Technical Details

I acquired this spool from J. W. Jackson in 2011.

This spool is 177 mm. tall, 113 mm. wide, 82 mm. thick, and weighs 803 g. It consists of an aluminum drum with two aluminum arms bolted to it, each with two steel cold shuts for attachment. The drum is 188 mm. long with a 73.2 mm. working length, and 79.5 mm. diameter with a 50 mm. working diameter. Two 10.5 mm. tall, 1.35 mm. pins on the top of the drum act as rope guides. One is 18 mm. from the inner side of the flanged end of the spool, the other 36 mm. The axis of the spool is bored to 41.8 mm, and there are slots milled at each end to keep the arms from rotating.

The arms are made from 25.4 x 6.4 mm. (1 x 1/4 inch) aluminum bar stock. They are bolted to the spool with a 5/16 inch (8.3 mm) bolt. I cannot see the internal details without disassembling the spool, but the bolt passes through two steel guide discs, one just inside each arm. These might be separated by a tubular spacer, but I suspect that they rest on an internal lip in the drum itself. There are two washers at each end of the bolt, outside the arms. The lower portion of each arm is bent inward until the two arms are separated by 36.5 mm. A 10 mm. hole in each arm allows attaching two 1/4 inch (6.4 mm) cold shuts to each side.

There are no identifying markings on this spool.

Comments

I have no history on this spool, but it is obviously noncommercial. The workmanship is good. The bored drum axis makes the spool much lighter than it otherwise would have been. The guide pins help keep the rope from "running over itself," a common problem with spools.