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Overbore, salvage or scrap?

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MikeK08/01/2022 22:58:21
226 forum posts
17 photos

I was recently making some toolholders for my QCTP. It's a Norman patent style, with one side slit for a clamping screw. I got one bored and another halfway trepanned before I realized they were oversize about 60 thou (1.5mm). Actually, they're about 30 thou over, but they would be 60 thou if I finished the bores.

Because of the clamping scheme I assumed putting a sleeve in the bore wouldn't hold up. Would you salvage these, and how? A completed (but not prettied up) holder is on the right.


Emgee08/01/2022 23:54:02
2406 forum posts
285 photos

I would bore out a bit more oversize to the current depth and loctite a sleeve in place, clamping action shouldn't cause a problem.


bernard towers09/01/2022 00:13:48
574 forum posts
109 photos

I’m with you emcee.

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