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Bowling ball drill bit

C

Crem

Member
My brother-in-law works at a bowling alley and they do some hole drilling in bowling balls. The drill looks like a masonry bit with a carbide or diamond tip. Anyway they have some drills that are getting dull and he is wondering where he could get something like that sharpened. He has tried it a little by hand but would like a more precise job. The new drills are around $40 to $50 each.
 
Don`t think a drill doctor would work on a masonry type bit.Around here in Appleton,WI ,there are a couple sharpening companies that sharpen drill bits,mill cutters.
 
Yes the drill doctor does work for masonry bits but it only works for drill bits up to 3/4", and I suspect the bowling ball bits would be larger than that. I got a drill doctor for christmas and used it to do a bunch of old bits today, several masonry bits.
 
If its a masonry bit made from carbide, you need a special stone to sharpen it. At work we had one that went on a standard 6" grinder. It was a light blue or green and I think they called it aluninum oxide. Im sure if you go to a place like Fastenal they can get you what you need. One of those bit holders that mount to the side of a 6" grinder should work well although we just did ours by hand. We did sharpen alot though so we did get good at it but if you dont do it much a rest would be nice.

Our biggest problem we had was when other trades used them for grinding regular metal... really messed the disk up so dont use it for anything but carbide. I think it was just idiots trying to grind too fast but thats what the boss said, "dont grind anything but carbide or it messes up the stone".
 
I'e got some diamond drills for lapadary work,
drilling agates, and the have industrial
diamond coating the tips. Sharping them would
grind the diamond off.
 
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