Max RPM for high speed steel drills

Helpful for race car, hot rod, and custom car builders

More tech info

drill sizestainless steelhigh carbon steellow carbon steelaluminum
1/16"244530566112---
1/8"1222152830567639
3/16"815101920375093
1/4"61176415283820
5/16"48961112223056
3/8"40750910192546
7/16"3494378732183
1/2"3063827641910
5/8"2443066111528
3/4"2042555091273
7/8"1752184371091
1"153191382955
Note: for carbon steel drills use 1/2 speed shown on chart

More tech info

Auto-ware main page

Copyright AutoWare 1997,98