Forstner Bits

[chipline]

Do you have your Forstner bits sharpened? DIY? Source?

 

[Mike Davis]

I sharpen all my own tools, also teach sharpening, and sometimes sharpen for others.
Forstner bits are pretty easy with a small diamond file.

 

[PeteM]

 

[bob vaughan]

Sharpening a real Forstner bit isn't something easy to do. The above shown video is clearly good for sharpening what used to be called a multi spur bit. It seems these days the descriptors for consumable wood boring tooling gets a little vague. Below are annotated examples of what I knew as a Forstner style bit. They aren't easy to sharpen at all because the inside of the outer edge has to be ground sharp.

 

[golfdad]

I just buy knew

 

[chipline]

What brand do you buy?

 

[tvrgeek]

Tried to do my cheap "Columbia" HF specials. Took some work as the flat edge is a single bevel. Smaller ones are smooth rim, so quite difficult. Bigger saw-tooth are easy.

I use these for "ugly" work. I bought some good Fisch bits for good work.