lathe tool post repair

12bolts

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A couple of the tool holder screw holes had been stripped out, so I figured I would do a neat repair.
The existing holes are 5/16 BSW, and I was replacing all the bolts anyway so I chased them all out to 5/16 UNC.
Then I drilled and tapped the 2 damaged holes out to 7/16, (that was as big as I could go and still have some side to the hole.
IMG_9812.jpg IMG_9813.jpg

I inserted a couple of grade 5 bolts, used loctite, and nipped them in tight to the end of the thread.
Cut the heads and the protruding thread beneath off and used the linisher to bring them flush.
IMG_9824.jpg IMG_5173.jpg

I drilled a small hole down the side of the 7/16 thread and pressed in a small pin to prevent any rotation of the insert. Then I simply drilled and tapped new holes to 5/16 UNC.

Cheers Phil

IMG_5173.jpg IMG_9812.jpg IMG_9813.jpg IMG_9824.jpg
 
Well, you've gotta like that, Phil. Nice repair.
 
Repair

That's a nice job and as good as new ! Just one question. How did you do it with that great big helmut on ?
 
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