Hello,
Any suggestions for cutting #10 holes in steel?
I've cut 11 other holes using my drill press in what I thought was regular grade steel sprockets (the drills went fairly well). On the
12th I've done nothing but polish a dent. I've tried several other bits of varying sizes with no results.So I tried to cut other holes in some of the other sprockets with the same dissappointing results. I find it strange that the first 11 went so well and then nothing but dents after that. (I'm making holes in bicycle small sprockets.)
All of my bits are metal grade bits (some Bosch Titanium's) and I have
3-in-1 oil.Is the sprocket's metal soft in some areas and hard in others?
Should I try to heat the sprocket, say with a blow torch, before I try to drill the holes?
Any help is appreciated.
Thanks.