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Mod | | | Forums66 Topics128,049 Posts1,055,741 Members48,426 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
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| | | Joined: Mar 2005 Posts: 1,513 'Bolter | | 'Bolter Joined: Mar 2005 Posts: 1,513 | Formula is:
cs x 4 /d = rpm. If cutting speed is 80 sfm (ok for mild steel) then 80 * 4 = 320 divided by drill diameter(.5) = 640rpm
Curt B.
1952 1300 Canadian 1/2 ton restomod You Tube | | |
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