How do you sharpen push drill bits?

[Michael Ray Smith]

The title says it all.

[george wilson]

Look carefully at the tip and duplicate it. They are just like spiral drills on the tip,but not spiral.

[Michael Ray Smith]

Thanks, George. I haven't sharpened spiral bits before, but the simple advice to look at it carefully and duplicate it worked for me. To be able to see what I was doing, I used the slotted disk on my Worksharp 3000 (with the bit mounted in the drill so I didn't have to try to hold the bit in my fingers, which could be a bit hazardous if the bit were to grab the edge of a slot) -- piece of cake! One question -- I know that you don't want to touch the flutes, but my intuition tells me to dress the "inside" of the cutting edge with a file or small diamond stone after I sharpen the tip. Good idea or bad idea?

[george wilson]

Just to remove any burrs you can dress the inside flutes. Don't get them too thinned or you may find the drills crack up the middle.