Little trick with collet. - Router Forums
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post #1 of 21 (permalink) Old 12-05-2016, 06:58 PM Thread Starter
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Default Little trick with collet.

Hi.

I'm about to buy my first router. The problem is, that it has 1/2"(12,7mm) collet while this size is not so popular in my country. And dunno why, new collet by itself costs about 1/4 of the router?! I know it may be really stupid but I'm thinking... How about to make a reduction?
My idea is to make a ring from ~0,35mm thick sheet of metal (brass or copper I think). Cut it in one point (so it can decrease diameter while screwing) Than, fit it on a bit and fit it into the collet? Yeah, I know router has high rpm and blah blah blah but I think, when this "ring" sits tight inside the collet it wont fall off, wont explode or smt Have ananyone tried it before? Or what's your opinion, will it work?

P.S. sorry for my english, I hope you understand what I wrote.
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post #2 of 21 (permalink) Old 12-05-2016, 07:09 PM
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I would call that a shim. Sounds dangerous to me if you're running at 20,000+ RPM. I think you're looking for a 12mm collet for your machine. Contact Bosch for information.

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post #3 of 21 (permalink) Old 12-05-2016, 07:09 PM
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@kojot

Welcome aboard
Your English is just fine and easily understandable.

I can't help you with your question, but if you would fill out your profile with your country (and a first name), the good folks here will be able to offer some direct help.

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post #4 of 21 (permalink) Old 12-05-2016, 09:53 PM
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Great first post, welcome to the forum.
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post #5 of 21 (permalink) Old 12-05-2016, 10:02 PM
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Welcome - hope you post a lot and show us your projects. I would be concerned, as others have said, about an out of balance situation. You don't need something spinning 20,000 rpm and getting a little wobble in the mix. These things are intimidating enough when they're smooth!
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post #6 of 21 (permalink) Old 12-05-2016, 10:19 PM
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Welcome Kojot. My advice is Don't Try It. There is a chance that it won't grip and the bit could come out- at very high speed. There is an even better chance that it will run out of balance. Third is that it will be unlikely to run centered. If it could be done successfully there would be commercial ones available and if there were I would have one because I have some 12mm bits I need a collet for.
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post #7 of 21 (permalink) Old 12-05-2016, 10:24 PM
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I certainly would NOT recommend something like this. There are all kinds of commercially made reducers for just the situation you describe.

And, yes, as Vince suggested, please fill out your profile. We have members from all corners of the world, maybe some right in your area, that have found SAFE solutions to your problem.

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post #8 of 21 (permalink) Old 12-05-2016, 10:26 PM
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Understand what you wrote and have serious doubts about it working. Think you will need a bushing adapter. See below link to Lee Valley. Problem might be currency exchange rates and shipping costs.

Bushing Adapters - Lee Valley Tools
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post #9 of 21 (permalink) Old 12-06-2016, 02:06 AM Thread Starter
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Thank you all for concens and welcome.

Quote:
Originally Posted by Cherryville Chuck View Post
If it could be done successfully there would be commercial ones available .
That's actually not far from truth. My idea is to make same thing as posted by @Ray Newman (big thanks for the link). It would look just like the first one from right. Only difference is in thicknes of adapter. So its not my invention. What makes me mad is, why the hell there's tons of sizes, but not the one that I need? Now I'm wondering why o why?!

@Cherryville Chuck :
It should be centered(or balanced) just like the one commercially availible shown above.

@DesertRatTom : Sorry but your thinking is bad. I'm definetely not looking for new collet. That's just f**** wrong to pay 150PLN(my currency) for collet when I bought the router for just under 500. Now you get where's my idea from?
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post #10 of 21 (permalink) Old 12-06-2016, 08:13 AM
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I would just buy a set of 1/2" bits on line and call it a day. With a complete set you probably won't need anything else for a long time. Trying to shim it won't work.
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