General > General Technical Chat
How much time to file down bolts ?
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Ian.M:
Yes, a crappy file will lead to nothing but pain and misery.  If you aren't certain your file is sharp, free cutting and large enough, go out and buy a good one.

I'd drill a hole in a small block of wood, a bit undersize for the thread, split the block of wood across the hole then put the block in the vice clamping the bolt firmly between the two halves.  It gives a lot better lateral rigidity than simply clamping between plain aluminum or plastic soft-jaws, so lets you vary the direction of filing with less chance of rocking the work.   V-grooved soft-jaws are a different mater, as they will clamp a thread (or other round object) securely, provided the V width & depth is appropriate for the thread diameter.
coppercone2:
well this shortens bolts pretty good



24 seconds / inch or so.
Gyro:

--- Quote from: MathWizard on May 21, 2022, 10:09:18 am ---So just off the top of someones head, how long would it take by hand file, to file down 0.7mm off a 1cm dia. bolt, an hour, many hours  ? And there's 4 of them. Wish I  knew someone with a lathe. And I'm not paying $80/hour tho.

--- End quote ---

Just curious as 24 hours have elapsed. Have you managed to file away the total of 2.8mm yet?  :D
Ian.M:
By now, he's probably worn a 1mm deep groove in a crappy Chinesium file while removing a small fraction of a mm from each screw!
BrokenYugo:
Chuck in a drill press or hand drill in a vise, running at a fairly low speed, then go at it with a file or grinder or whatever. Work slowly and measure often.
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