Seized collet nut - Router Forums
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post #1 of 19 (permalink) Old 04-25-2020, 06:58 PM Thread Starter
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Default Seized collet nut

I have a Triton 3 1/4 hp router with the nut seized up on the collet. I was making cabinet doors today and I went to change router bits and it was really difficult to get the bit loosened up. I put another bit in and tried to tighten it up. It failed to secure in the collet. I tried a few drops of machine oil.
It will not move either way at this point.
I keep a grommet in the bottom to prevent the bit from bottoming out. However it doesn’t appear to be there now. Since the bits are matched sets and I have not had any misalignment with my door pieces I don’t know what happened to the grommet.
Any suggestions on what I should try at this point? Thank you!
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post #2 of 19 (permalink) Old 04-25-2020, 08:21 PM
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Are you able to get the collet nut off the spindle shaft but unable to remove the collet.
The only reason I can see that they collet froze up or seized is from heat which means the bit or collet came loose inside spindle shaft ( probably destroyed the grommet)
If it were mine I get the collet out of shaft once out you could clean shaft pocket and replace collet
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post #3 of 19 (permalink) Old 04-25-2020, 08:31 PM
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Might be time for a Musclechuck...Hope the shaft and threads are OK. I guess you can both undertighten and over tighten a collet nut.

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post #4 of 19 (permalink) Old 04-25-2020, 10:17 PM
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Did you have the collet nut completely unscrewed before it failed to tighten? It sounds like it's possible that the nut got cross threaded.
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post #5 of 19 (permalink) Old 04-26-2020, 07:06 AM
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My Bosch 1617 has a little ‘tight spot’ midway on the shaft threads that I have to ‘get by’ with the wrenches each time I tighten a bit before doing the final snugging. Happens on both collets. Not a problem, not getting worse but not ideal either. If I could afford (and I can) a Musclechuck, it would eliminate the problem, which threading and unthreading anything is bound to create at some point. Eventually, safety drives us to make our tools work correctly before a catastrophe, which a router would be a candidate.

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post #6 of 19 (permalink) Old 04-26-2020, 07:34 AM
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Quote:
My Bosch 1617 has a little ‘tight spot’ midway on the shaft threads that I have to ‘get by’ with the wrenches each time I tighten a bit before doing the final snugging. Happens on both collets. Not a problem, not getting worse but not ideal either.
Could just be a bad collet. Have you tried a new one?

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post #7 of 19 (permalink) Old 04-26-2020, 08:02 AM Thread Starter
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As of yesterday I was unable to get the nut off the collet. It will not move either way. I put a little oil on it and hope it will get down in the threads. I will try again today.
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post #8 of 19 (permalink) Old 04-26-2020, 08:05 AM
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The collet is captured in collet nut. So I am confused, is the bit seized in the collet or is the collet nut seized on the router spindle? There is enough play in the collet assembly to allow debris to cause the collet freeze up. I clean them with brake cleaner every now and then. If the collet nut is frozen on the router spindle I suspect it might be cross threaded. If that is the case, and the treads are damaged on the collet nut or spindle you might have to replace one or both.
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post #9 of 19 (permalink) Old 04-26-2020, 09:44 AM
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Brian; "My Bosch 1617 has a little ‘tight spot’ midway on the shaft threads that I have to ‘get by’ with the wrenches each time I tighten a bit before doing the final snugging..."

Do you mean in addition to the normal point at which you need to use the wrench. That point at which you need to use a wrench is normal. I never paid attention to the number of revolutions but I think it might be an additional 1 1/2 or 2 to get it properly tightened.
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post #10 of 19 (permalink) Old 04-26-2020, 09:51 AM Thread Starter
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Collet nut will not loosen or tighten. There is no router bit in the router. Been using this router regularly for about 3 years, never had an issue. I decided to order a new one as I am making cabinet doors for a customer. I will either fix it or send it in to be repaired and keep it as a back up. Maybe make a new router table. Thanks for the input.
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