Kestas
Staff member
What's a good one for the money that'll do a good job?... something that plugs in and has its own motor and grinding wheel. I see them range on eBay from $40 to $120.
Drill Bit Sharpeners
- Thread starter Kestas
- Start date
- Status
buy a drill doctor. they are made by darex which builds real industrial drill sharpeners. they are easy to use and your bits will be sharper than new.
I picked up one from Harbor freight for $20. Seems to be doing a decent job. Only goes up to 3/8''. I can do a fair job by hand on the bigger ones.
Just a question for you guys, wouldn't the drill bit lose some of its geometry and precision (in diameter) after you sharpen it?
only the tip gets sharpened, not the diameter. resharpened bits are often better than the original grind. depending on which model of sharpener you buy you can grind any tip geometry you need, 118*, 135*, split point, thin web, relieved etc.
I assume they can't be used with TiN bits, right?
the coating on the bits make no difference unless you are using them in production. a dull TiN bit still cuts worse then a resharpened TiN bit, and resharpening costs a lot less. for the average guy TiN is just a marketing scheme.
I second the Drill Dr. I have the higher end one and it works great on my cobalt bits. That said, calculating the proper surface speed for the bit diameter/material and using a good cutting oil and drlling technique goes a long way in keeping them sharp in the first place.
- Status
