UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

Goldie99 · 9th Dec 2019, 7:03 pm

A long bolt straight through the centre of the insulator, with appropriate oversized washers (at the bottom), and something like a very large 'socket', big enough to clear the diameter of the metal collar at the top, could be used as a 'puller' - that's how we used to 'pull' new small-end bearings, or some gearbox bearings, into / out of place on older motorcycles.

Nuts at each end can be just tightened to provide a controlled 'pull', possibly with the aid of oven heat, and penetrating oil. If the insulator is phenolic, then 100°C shouldn't damage it, but may be enough to expand the metal sufficiently to free it off...

9th Dec 2019, 7:03 pm	#53
Goldie99 Heptode Join Date: Jul 2014 Location: Boston, Lincolnshire, UK. Posts: 995	Re: Damaged vintage variac A long bolt straight through the centre of the insulator, with appropriate oversized washers (at the bottom), and something like a very large 'socket', big enough to clear the diameter of the metal collar at the top, could be used as a 'puller' - that's how we used to 'pull' new small-end bearings, or some gearbox bearings, into / out of place on older motorcycles. Nuts at each end can be just tightened to provide a controlled 'pull', possibly with the aid of oven heat, and penetrating oil. If the insulator is phenolic, then 100°C shouldn't damage it, but may be enough to expand the metal sufficiently to free it off...