Hex Drive precision screwdriver bits

MrAl

Joined Jun 17, 2014
11,389
Hello again,

I forgot to mention that grinding the old driver tip takes a little practice because the old ridges are worn so they have to be ground down first, and that means the angle has to be made right. Once the angle of all four ridges is right, then the grooves between ridges can be reqround and it forms an entirely new driver tip. It's almost like taking a steel rod and grinding one end to a point like a pencil point and then grinding the grooves that form the ridges into the tip. It's a bit easier than that though because the old grooves are still visible before grinding the new ones.
Another advantage to this is you can make the angle as you like, and the ridges a little wider and flatter than a normal bit. You end up with a really strong tip that does not try to push its' way out of the screw head recess.
The best tool seems to be a Dremel or similar and one of those thin grinding disks that mount on the end of a mandrel that mounts in the drill chuck. The disks are thin enough to grind narrow grooves. Also the diamond disk type would work even better as they are even thinner.
 
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