Precision drill grinder

[coffmajt]

Just finished this sharpener (thanks Mark Frazier) for small drill bits ground with 4 facets instead of conical. I like the way they center. Jack

 

[Mark_f]

Looks good ...... What grit wheel are you using?

 

[coffmajt]

Looks good ...... What grit wheel are you using?

100 CBN and the finish looks good. Making the arbor and getting the wheel to run as true as I wanted took me more time than I expected. Part of the problem was my grinder thread was about .050 undersized so I had to make a special nut to custom fit the thread, then blue it in for fit. Jack

 

[Cobra]

View attachment 238447 View attachment 238448 Just finished this sharpener (thanks Mark Frazier) for small drill bits ground with 4 facets instead of conical. I like the way they center. Jack

Looks good. Did you build the point splitter to go with it?

 

[coffmajt]

Looks good. Did you build the point splitter to go with it?

No, I only plan to use it for smaller bits and I'm happy with how they perform so far. Jack