router bit dropping out of collet when working - Router Forums
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post #1 of 11 (permalink) Old 12-19-2012, 01:48 PM Thread Starter
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Default router bit dropping out of collet when working

Hi this is my first attempt at asking a question,so bear with me. I have a makita rp2301 which I bought new in May this year,it worked ok untill last week,when the cutter dropped down the collet and ruined a cabinet top I was making.When fitting the cutter it seemed as the nut was screwing down too far and running out of thread,the machine is still under warranty and I was going to send for a new collet first before I send it back,has anyone else had this problem?
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post #2 of 11 (permalink) Old 12-19-2012, 03:53 PM
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Hi John.

Welcome to the router forum.

Thank you for joining us.

Have you changed cutters, some cutters in Europe are metric sizes? This is the only variable in your scenerio...

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post #3 of 11 (permalink) Old 12-19-2012, 04:54 PM
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Welcome to the forum. Are you using a 1/4" collet adapter. If you are be sure the slots are lined up.
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post #4 of 11 (permalink) Old 12-19-2012, 05:21 PM
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Is it only with certain bits? Are they of a reliable brand? Measure the shaft, if it is undersize the collet may not be able to tighten on it.

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post #5 of 11 (permalink) Old 12-20-2012, 11:44 AM
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i have a Makita which I bought to replace a router with only a 1/4 in collet that had the same problem you describe. In my case it would release cutters while operating. After launching two cutters towards Jupiter I knew it was not that I simply had not tightened the collet sufficiently. It was only a matter of time that one cutter would be launched in my direction.

You have a dangerous situation. Given the worldwide mix of metric (SI) and Imperial measurements it seems to me that, as James, Richard and Roger have said you do need to be certain of the shaft size and collet sizes, then if all is as it should be, send your router to Makita for service. At least in the US they have been very good for me; I just wish the warrenty had been for longer than one year.

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post #6 of 11 (permalink) Old 12-20-2012, 12:07 PM Thread Starter
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thanks for your reply Tom,as well as the new makita rp2301 I also have the older Makita model 3612 which I have had for three years without any problem.I am using the same cutters for the new router,so I don't think its the wrong size cutter,unless Makita have have changed the spec on the new model.I have had both routers together on the bench to see if there is any difference when fitting the cutter,on the new model it does not seem to tighten up on the collet before the nut runs out of thread,it does not feel the same as the old model.I wonder if I may have over tightened the new model and damaged the collet?Any thanks again for your help
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post #7 of 11 (permalink) Old 12-20-2012, 04:40 PM
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[QUOTE=clarion;315274]it worked ok untill last week,when the cutter dropped down the collet and ruined a cabinet top I was making.QUOTE]

OK, you're losing me a bit here. Is the router mounted in a table, and pointed up?
Or, is it free handed, and pointed down?

If you have the router bit bottomed out, then the collet tightened, the router bits seem to have a tendency to 'walk' out a bit. I spoiled several work pieces before I found out that the bits should be about 1/8" from the bottom, then tightened. Never had that particular problem happen again once I learned that trick.

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post #8 of 11 (permalink) Old 12-20-2012, 06:29 PM
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You should not bottom a bit in the collet. If the bit is bottomed, the collet can't tighten.

If the bit is floating in the collet and the collet is cinched up, the rotation of the router tightens the collet automatically. There is no reason to try to tighten the collet like it was a lug nut.


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post #9 of 11 (permalink) Old 12-20-2012, 06:40 PM
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http://www.sommerfeldtools.com/somme...log/page03.pdf

===
[quote=JOAT;315450]
Quote:
Originally Posted by clarion View Post
it worked ok untill last week,when the cutter dropped down the collet and ruined a cabinet top I was making.QUOTE]

OK, you're losing me a bit here. Is the router mounted in a table, and pointed up?
Or, is it free handed, and pointed down?

If you have the router bit bottomed out, then the collet tightened, the router bits seem to have a tendency to 'walk' out a bit. I spoiled several work pieces before I found out that the bits should be about 1/8" from the bottom, then tightened. Never had that particular problem happen again once I learned that trick.



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post #10 of 11 (permalink) Old 12-21-2012, 10:37 AM Thread Starter
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Hello James thanks for your reply,no I have not changed cutters I have the older makita model as well as the new one which I am having problems with ,no problems with the old one using same half inch cutter on both machines old one ok new one cutter dropping down when working hand held,not tried it in router table but I can't see that making any difference, so I will have to wait for the new collet to come,if that does not work I will send it back to Makita.

Thanks again for your help

John
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