Quote:
Originally Posted by Merlin66
Undersized boss diameter.
Any packing would have to be pretty solid.
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Depending on how undersized the boss is relative to the mating hole then use
brass shim or even a large thin walled brass or copper tube split in half or thirds (and teased in to shape) to suitably make up the gap. It depends if it is several millimeters or under one mm. Something like a very short (maybe 30-40mm) length of diameter 32mm, 40mm or 50mm copper pipe/tube would possibly work. It has a wall thickness of around 1.2mm.
EDIT: having now seen the
underside of the mount extension headpiece, I would now not recommend using tube (perhaps too difficult for piece). Simply fashion a strip of copper of appropriate thickness to take up the gap, possibly even 3 pieces, at the screw boss protrusions on the underside of the mount extension headpiece. You may even want to fix these in place with adhesive like araldite - It would depend on the surface contour and whether one used 3 separate pieces or one ring as a copper packer.
Best
JA