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Old 07-02-2011, 09:15 AM   #1
Sokoloff
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Question How do I sharpen this (Greenlee Nail Eater drill bit)?

Have a couple of these and they're pretty dull now after a couple of big jobs in old houses retrofitting low-voltage cabling.

I've seen indications that they can sharpened a couple times, but I'm clueless about how to go about doing it.

They look like this:

But mine look more like this at the moment:


The drive screw threads are fine; it's the leading cutting edge on the bit that I need to sharpen.
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Old 07-02-2011, 10:06 AM   #2
reptilezs
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Default Re: How do I sharpen this (Greenlee Nail Eater drill bit)?

sharpen it like anything else. match the factory angle and knock off the bur. what sharpening tools do you have? i would use a fine file or small diamond stick.
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Old 07-02-2011, 10:28 AM   #3
Sokoloff
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Default Re: How do I sharpen this (Greenlee Nail Eater drill bit)?

I haven't done much sharpening of anything beyond my lawnmower blade and kitchen knives. I've got a bench grinder, dremel with assorted carbide and diamond bits, and hand files, and I'm basically a total newb at sharpening.

I'll give the hand files a shot, as I've got nothing to lose. Thanks!
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Old 07-02-2011, 10:54 AM   #4
Yojinbo
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Default Re: How do I sharpen this (Greenlee Nail Eater drill bit)?

I would treat it like its' auger bit ancestors: http://www.fine-tools.com/G-augerbitfile.html
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Old 07-02-2011, 11:01 AM   #5
reptilezs
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Default Re: How do I sharpen this (Greenlee Nail Eater drill bit)?

Quote:
Originally Posted by Yojinbo View Post
I would treat it like its' auger bit ancestors: http://www.fine-tools.com/G-augerbitfile.html
good link and that augur bit file is cool
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Old 07-02-2011, 01:48 PM   #6
scott37300
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Default Re: How do I sharpen this (Greenlee Nail Eater drill bit)?

I did electrical for two years and we went through a lot of those bits. I had the boss buy a small triangular file(not sure the correct name here) and I just gave the leading edge a quick sharpen every couple days as needed. Worked great and lasted for a while. A sharp bit really makes the day go by faster so I didn't mind taking a few minutes every so often to touch it up. But like anything else eventually they will need more and more shaprening and get to be garbage, but that would take a while for the average homeowner.
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Old 07-02-2011, 05:38 PM   #7
Sokoloff
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Default Re: How do I sharpen this (Greenlee Nail Eater drill bit)?

Thanks for all the help, especially the links to the pictures Yojinbo!

It was much, much easier than I'd made it out to be, and now I feel dumb for waiting so long and suffering with a dull bit on the last couple small jobs. I'm sure the special files are fine and all, but a regular half-round file made short work of it. I will probably try to pickup a small triangle file, as that would work slightly better, but a half round has enough clearance on the two bits I tried.
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