Originally Posted By: snrub
Originally Posted By: esshup
Did you try using a cutting lube for the rubber? WD-40, dish soap, etc? I've learned that when drilling holes, (with any type of drill bit) the holes drill easier, and the bits last longer if lube is used.

FWIW, call around to find a sharpening service. They should be able to sharpen those step drills too, if they can sharpen regular drill bits.


Never even crossed my mind of trying cutting lube on rubber.


Try it, but make sure that you have a good hold on the drill. I've had the bit grab and just corkscrew through material instead of cutting a hole. Not the step drills, but regular drills. It never happens with the small bits, typically around 1/2" and larger. Immediately 2 things go through my mind. 1) I gotta let go of the trigger. 2) If I let go of the trigger, I'll relax my grip on the drill and get hurt. So, what usually happens is I ride it all the way to the chuck, or until it runs out of flutes. grin

www.hoosierpondpros.com

[Linked Image from lh6.ggpht.com]
http://www.pondboss.com/subscribe.asp?c=4
3/4 to 1 1/4 ac pond LMB, SMB, PS, BG, RES, CC, YP, Bardello BG, (RBT & Blue Tilapia - seasonal).