Novice makes elementary blunder and jams collet - Router Forums
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post #1 of 15 (permalink) Old 02-25-2016, 10:31 AM Thread Starter
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Default Novice makes elementary blunder and jams collet

Hi all

(my first post, following pronged lurking)
This is an embarrassing start: a promising career as a router-user cruelly nipped in the bud

I inserted a ¼-in. centering-pin in my Bosch POF 1300 router's chuck, failing to notice that the chuck in place was an 8 mm one (doh!). The result is that the collet is now jammed in the spindle (if that's the right term) and so far I haven't been able to extract it.

I've unscrewed the chuck itself and have tried loosening the collet by knocking it upwards (since I've no way to pull it out) using a bit of scrap wood and hitting it with a mallet. That didn't work and for fear of damaging the spindle I desisted after a few sharp taps.

Has anyone any tips as to what I might try next, please? ("Buy a new router" would not be a welcome such...)
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post #2 of 15 (permalink) Old 02-25-2016, 10:59 AM
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Take the nut off and lay the router on its side and using a hammer and pin punch, or something similar, tap all around the collet. Be careful not to hit the threads on the shaft. It will eventually loosen up. You should probably replace the collet after. The slits in the collet will be squeezed together and you probably won't be able to get a bit in it now unless you spread the slits apart again and I don't know how reliable that will be.

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 #3 of 15 (permalink) Old 02-25-2016, 11:22 AM
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Tyro, welcome to the Forum and good luck. Keep us posted on the results.

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post #4 of 15 (permalink) Old 02-25-2016, 07:06 PM
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Tyro,
You might consider buying/borrowing a mini gear/bearing puller. I'd bet dimes to dollars one of your local mechanics or tool repair shops would have one handy.
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post #5 of 15 (permalink) Old 02-25-2016, 09:46 PM
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Welcome to the forum.

Ross,
Rockhampton, Queensland, Australia


Enjoy the knowledge of others that can be found within.

‘Members are requested to add a first name in their profile as we are a very friendly bunch here'.
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post #6 of 15 (permalink) Old 02-26-2016, 12:44 AM
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take a couple of pics so we can see exactly what youve done.
You cant post pics here till you have a few posts logged, but upload them to any web browser and give us the link so we can see.

I dont quite get why its jammed. if you put a bit too small in the collect, then it should squeeze the collet smaller, not larger. If the bit is still in the collet then clamp the bit in a vice and pull the router upwards and away.
Pictures are really helpful in trouble shooting.
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post #7 of 15 (permalink) Old 02-26-2016, 03:10 AM
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Quote:
Originally Posted by sunnybob View Post
take a couple of pics so we can see exactly what youve done.
You cant post pics here till you have a few posts logged, but upload them to any web browser and give us the link so we can see.

I dont quite get why its jammed. if you put a bit too small in the collect, then it should squeeze the collet smaller, not larger. If the bit is still in the collet then clamp the bit in a vice and pull the router upwards and away.
Pictures are really helpful in trouble shooting.
pictures stored on the computer's HD that's being used to post from can be posted...
it's links that won't post till after the member has 10 posts...

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post #8 of 15 (permalink) Old 02-26-2016, 03:24 AM Thread Starter
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Thanks for the friendly welcome, and the tips.

I will report-back in due course.

(Btw for "pronged" read "prolonged" - altho' I'm not sure that "pronged" isn't better)
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post #9 of 15 (permalink) Old 02-26-2016, 07:56 AM
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That's okay Tyro, we can read most forms of typonese.
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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 #10 of 15 (permalink) Old 02-26-2016, 11:29 AM Thread Starter
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OK, reporting back (I bet you could hardly wait...).

I got the seized collet out, by using a punch and a (light) hammer, so that's the main thing. Trying to pull it out with pliers failed; I think I read somewhere here (?) that the inner bore is tapered, if so pliers are a bad idea anyway I suppose.

I think the chuck is a write-off but that's hardly the end of the world. I'm attaching pics showing
  • the 8 mm nut and collet disassembled
  • pristine ¼ in. chuck on left
  • ditto on left for comparison with damaged 8 mm, which can't be properly re-assembled
The 8 mm collet no longer seats in the nut; in the pristine chuck the collet is retained in place (I imagine by the spring-steel ring near the base of the collet visible (just about) in the first pic). In my damaged 8 mm chuck the collet won't go all the way in, as can be seen in pic 3. I tried hitting it (bit of waste interposed) but to no avail. (I think I had it the right way up - hard to tell really).
Attached Thumbnails
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