- Joined
- Mar 26, 2018
- Messages
- 2,724
I've been doing electrical panels for years and have tried all kinds of different tools (hole saws, step drill sets, greenlee punches, trepanning cutters, jig saw, etc.) to make cutouts for electrical connectors and trade size fittings. I've found them all to suck other than step drills, but I found them to be very expensive and limited in range.
I just picked up a new step drill from AutomationDirect for $55. Pricy, but it drills its own pilot hole and goes up to 1.375" (1" trade size) with major steps at 7/8" (1/2" trade size), 1.125 (3/4" trade size), 1.218, and 1.25. It also has minor steps at 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", and 11/16". Split point, HSS, and helical ground flutes. I think this will be the last knockout tool I buy for a long time.
I just picked up a new step drill from AutomationDirect for $55. Pricy, but it drills its own pilot hole and goes up to 1.375" (1" trade size) with major steps at 7/8" (1/2" trade size), 1.125 (3/4" trade size), 1.218, and 1.25. It also has minor steps at 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", and 11/16". Split point, HSS, and helical ground flutes. I think this will be the last knockout tool I buy for a long time.