by DCASonex » Tue Dec 06, 2022 11:01 am
You can drill all holes with a battery operated drill, but the much higher speeds of a good pneumatic drill will make for rounder holes as well as faster work.
Drill a few 1/4" holes in a piece of scrap at a very low speed and then look at the result with a magnifying glass. Then compare with holes drilled with the same 1/4" bit at say 2,000 - 2,500 RPM . The difference will also exist on a smaller scale with #30 drill where recommended speed is 3,500 - 6,000 RPM.
David A.