The two piece jig with coach bolts for clamping

The steel section bent into shape by hand and wooden mallet

The final piece prior to painting. This item was made in lead coated steel.

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A Jig for Fabricating Cable Trays

 

Almost every job involving a new component needs some kind of jig for successful production. This one of many jigs I have made (or obtained) for various jobs on rebuilding work.

The '34 Riley 9's have small sections of sheet steel cable trays, bolted to the right hand side of the chassis, to carry the petrol pipe, Hobson airline and electric cables. The trays vary in number and length but the J' section is standard. The original 18 gauge steel is usually corroded beyond reuse, so during a rebuild it is well worth replacing them. The photos show a simple two part jig made from ply and hardwood which allows consistent dimensions of the section to be maintained. The steel strip, after cutting to size, first has the narrow flange formed along its length. This flange provides correct location in the jig. The two halves of the jig are bolted together with the steel located in place and the shape is easily bent over to become the final section. After removal from the jig the section can be cut to final length and the cut-outs and slotted holes formed.