OzFab
New member
Pat (machinist@large) & I discussed this subject some time ago &, yesterday, I had reason to sharpen a drill bit so, I decided to shoot a vid of the process...
https://www.youtube.com/watch?v=chpk8h7OJJY&feature=youtu.be
As I mentioned in the vid, this is NOT how to precision sharpen drills, it's for DIY purposes only...
One or two points I forgot to mention in the vid:
- the overall angle of the tip cutting edges is ~60°
- to make life easier, scribe a line on the bench grinder tool rest as a reference or even make a gauge from a piece of 3mm (1/8") scrap; upon request I can provide a cutting template for said guide...
In the description on YT, I also added
https://www.youtube.com/watch?v=chpk8h7OJJY&feature=youtu.be
As I mentioned in the vid, this is NOT how to precision sharpen drills, it's for DIY purposes only...
One or two points I forgot to mention in the vid:
- the overall angle of the tip cutting edges is ~60°
- to make life easier, scribe a line on the bench grinder tool rest as a reference or even make a gauge from a piece of 3mm (1/8") scrap; upon request I can provide a cutting template for said guide...
In the description on YT, I also added
I keep referring to "the flute". This is incorrect as the flutes are the hollow channels of the drill bit. The term I should have used is the relief area behind the cutting edge...