Wondering if I damaged my collet? - Router Forums
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post #1 of 7 (permalink) Old 07-31-2020, 04:24 PM Thread Starter
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Default Wondering if I damaged my collet?

Rookie mistake

I am in the process of building a garden door and I am about 98% done. The top has a large 40" oval and I needed to route a couple WRC 2 X 2's to fit in the center as a criss-cross pattern. Since I still had the jig mounted to the router I just put the 2 x 2 under the 3/4 plywood circle. clamped it down and started cutting so as to cut a perfect fit with a rounded matching edge.

Everything was going fine but the 3/4 ply + the 1.5" 2 x 2 was too much length for the whiteside bit I was using. After smelling the burnt wood I investigated and found the problem. The collet rubbed on and burnt the plywood during the plunge.

Do I need to be concerned I damaged my collet?

I have not pulled the bit and inspected the collet but assuming it looks OK, and tightens down, is there any thing I need to further inspect?

Thanks for any thoughts.
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post #2 of 7 (permalink) Old 07-31-2020, 04:59 PM
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the heat may have changed the temper or case harden it......

loss of temper - it won't hold well or deform..
case harden - it will break/crack...

then again you just may have got lucky...
I'd keep a spare on hand...
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This would have been the week that I'd have finished chewing thru the restraints...
If only new layers hadn't been added....

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Forget the primal scream, just ROAR!!!
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post #3 of 7 (permalink) Old 07-31-2020, 06:11 PM
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Hard to believe you'd get high enough temperatures with a bit of friction for a few seconds???
https://www.hudsontoolsteel.com/technical-data/steelO1
Wood ignites at...
https://www.fireengineering.com/1949...ature-of-wood/
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post #4 of 7 (permalink) Old 07-31-2020, 06:16 PM
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The collet nut and armature act as a heat sink to draw away some of the heat from the collet so it is probably ok.

Someone I consider a master woodworker once told me that a master woodworker is not someone who never makes mistakes. He is someone who is able to cover them up so that no one can tell.
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post #5 of 7 (permalink) Old 07-31-2020, 07:10 PM Thread Starter
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Thanks to all for the comments.

It was more than a few seconds, but not a lot more, I think I made a couple passes before I realized I had hit the depth limit and was rubbing on the plywood. I started smelling the wood and should have stopped right away, as the burnt wood smell became more intense I took a close look and saw my mistake.

I also had some concern of the collet rubbing on the work surface at the high speed and some possible bend or deforming that could have caused damage.

I assumed all was OK but thought I would ask those who know.
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Last edited by ABear; 07-31-2020 at 07:16 PM.
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post #6 of 7 (permalink) Old 07-31-2020, 09:50 PM
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Unless you see physical damage or a discoloration of the collet metal, it seems the plywood got the worst end of the deal....

Common Man Woodworking
Powell, TN
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post #7 of 7 (permalink) Old 08-01-2020, 12:27 AM
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People pay good money for that, you know...
https://www.rockler.com/hand-tools/w...-burning-tools
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