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drill extension

Countersink Extension

November 2, 2019June 16, 2019 by Nigel
countersinking tool

The poppet valve crankcase has been bugging me and I wanted to fix the brackets from inside the crankcase with countersunk caphead bolts. There just wasn’t room or the right angle to get a bit in to make the countersinks. The bit extension was made in two parts plus a grub screw. The shaft on … Read more

Categories Engines, Homemade Tools Tags countersink, crankcase, drill extension Leave a comment

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