Did I ruin my counterbore?

[Varga Knives]

I finally got in a HSS counterbore for the large GTC bearings I want to use on my framelock. Working on the titaniun was no problem and I got some nice curly-q's. When I went to counterbore a little pocket on the hardened blade side nothing happened. I tried for a few seconds and gave up. Okay, too damned hard. I went back to the titanium and now I just get dust, some fine chips and a lot of heat. Can I salvage this counterbore?

Thanks!
Mark

 

[Don Hanson III]

You roached it. Maybe you can sharpen it?

 

[Bob Ohlemann]

You can probably re-sharpen it with a small diamond file.

Bob

 

[Alpha Knife Supply]

Using a counterbore is not the best way to make bearing pockets. Counterbores do not have the accuracy you need for bearings. Use an e-mill with a rotary table.

Chuck

 

[FTO_dude]

When I went to counterbore a little pocket on the hardened blade side nothing happened.

Why did you think that would work?

Try sharpening it, theyre not too difficult

 

[Varga Knives]

Thanks guys. I'll check into sharpening it and see about picking up something in carbide as well. I thought it had an HRC in the mid sixties and would do a little something. Live and learn. BTW, here's what I used: http://www.mutualscrew.com/Straight-Shank-Counterbores/straight-shank-counterbore-hss-83776.html

Just ordered and endmill, too.

 

[Erin Burke]

Using a counterbore is not the best way to make bearing pockets. Counterbores do not have the accuracy you need for bearings. Use an e-mill with a rotary table.

Chuck

This is an interesting piece of advise Chuck... never would have thought of it myself. I'll have to give it a try in the future. :thumbup:

 

[DukeHarley]

Contact your local Tool & Die/Machine Shop supplier they can give you the name of a local cutter grinder or sharpening shop that does rev rind work on cutters.

Jay