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Old 2 Days Ago   #256
dmforcier
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Harbor Freight has a drill bit sharpener that sets and holds the correct angle. Probably pay for itself in short order.
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Old 2 Days Ago   #257
Worth1
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Quote:
Originally Posted by dmforcier View Post
Harbor Freight has a drill bit sharpener that sets and holds the correct angle. Probably pay for itself in short order.
They bought a cheap one and lost the parts or dont know how to use it.

There is no exact correct angle there are many angles for different materials.
Been doing it with an angle gauge by hand for years.
I even hand grind them for flat bottom counter bore holes.
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Old 1 Day Ago   #258
Rajun Gardener
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I used a Youtube hack without having to do anything special to make it work. I had to remove a rusted in CV axle on a Toyota. It's the Vise-Grip hack connected to a slide hammer but this time it's all in a rental kit and I just bought a new set of Vise-Grips to make sure it would grab. This rental kit from Advance has an adapter that fits the Vise-Grip so all you do is remove the tightening screw on the VG and insert the adapter and bang away once you get a good grip. I did have to grind a better groove to grab it but it worked.

It didn't work as easy as it looks but it did finally come out and in my opinion these are the tools to use if you get a rusted CV axle.

Here's pics of the set-up and numbers for the kit from Advance Auto.

Have fun Weekend Rebels, this job builds character.
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Old 23 Hours Ago   #259
Worth1
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Here is the old school way of grinding a drill bit with homemade guage.
One is to get the angle the other ruler is to get the point centered.
It is attached with a small tool makers clamp.
The bit is sharpened at an angle for aluminum but cuts through mild steel like hot butter.
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Old 23 Hours Ago   #260
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Here is a quick reference for the angles for different materials.
dont let all the angles confuse you.


For wood I will take a brand new bit if I have to and put it on a 135 degree point angle.
Most of my bits are at this angle more or less after awhile because it works best for me anyway.
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Old 21 Hours Ago   #261
Rajun Gardener
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I usually just fire up the bench grinder and make it sharp again and it works more times than not. Follow the angle that's there and you really can't mess it up but I've seen people do it so common sense helps.

Here's a quick tutorial for anyone who hasn't seen bit sharpening. https://www.youtube.com/watch?v=mDdJ7CspBM0
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Old 12 Hours Ago   #262
loulac
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Let me add an unusual way of sharpening tungsten carbide drills used for concrete : most metal drills won’t cut very hard steel unless you buy top quality at a high price. Sharpen your concrete drill giving it the right angle for metal, you will drill your hole without spending a lot of money.
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