Question about Makita 3612C Router

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How do you fit 6mm collet cone on new produce

Brand bew 3620x4/2 router with P-24876 bit set. Bits will not fit how do I put in 6mm collet cone - does it need brute force?

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  • David Ford
    David Ford May 11, 2010

    I am not exactly sure what you are trying to do. The 3620 is a 1/4 capacity router. The bit set that you mention is not showing up on the Makita database. As far as I can remember some of the collets for the Makita routers snapped into the collet nut. If this is the case with yours all you have to is hold the nut and push the collet sideways. But again I don't know about this 6mm cone or the bit set. If you can provide more info I will try and help more.

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  • 1,996 Answers

You have, I presume, already locked the spindle and loosened the collet nut with the wrench, have you not?
Once the nut is loose, you should be able to remove it by spinning it off the threads by hand. Then insert the 6 mm collet cone into the collet,
carefully thread the collet nut back onto the collet, and tighten it with the bit in place.
Sometimes bits are a snug fit, especially into a new collet. If you have some fin sandpaper you can gently chamfer the very end of the bit where you first insert it into the collet, and this may help to insert it. If you have to, push a bit.
I have noticed that some companies tend to mill the shafts of their bits a little too close to the exact tolerance, or even oversize them slightly, and this can cause frustration when inserting their bits. In exceptional circumstances, I have resorted to polishing a couple of small bit shafts with very fine (600 grit or so) emory cloth, just to allow the bit to enter the collet. I would not recommend this with a new router collet, unless you have checked the bit with a micrometer and it is oversize. Odds are you just need to break things in a little.
The force need not be brutish, but you may need to use some force, yes.

If I've managed to answer your question or solve a problem, please take a moment to kindly rate this post....thanks!

Posted on Mar 29, 2009

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I have a brand new Ryobi router model ERT241200. Am I supposed to insert the 1/4'' collet into the cavity where the collet nut is, then insert the bit into the collet and tighten the collet nut? I thought...


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Mike, The fit is just a little more snug than you expect. The collet is springy, and will expand to fit your bits, even if they were oversize (which is very unlikely). Put on a leather glove and just push the shank of the bit into the collet. Do not try to file down the shank of your router bits, you will only make them run eccentric. You don't need to remove the collet. Just loosen the locking nut about a half turn after it is easy to turn. Good luck. Thanks for using FixYa. Al Kupchella

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a new collet won't hurt, but you may try sanding down the inside of your existing collet with 120 - 180 grit sandpaper. also, buff down the router bits

any condensation or moisture that may have gotten on these items can cause almost invisible oxidation that you can remove easily by sanding. DO NOT USE WD40!!!


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The router bits will not fit in the collet. When the collet snaps into the collet nut the bit does not fit.


The collet is loosely screwed on, correct?
Is it close, or 1/4" off. You may need an adapter for different sized bits.
I have noticed, particularly with Freud bits, that they seem a bit oversized. Try putting the bit in the collet before you insert the collet into the router.
If you're very careful, you can use fine emory cloth (like 400 grit or higher) to polish the bit by cutting a long strip and clamping the bit in a vice, then gently polish the shank a little to allow it to fit into the collet. Pull back and forth on the ends of the sandpaper like you were buffing shoes, but I would only recommend this if you can use a micrometer to check the shank and it is in fact oversize.
You could create a dangerous situation if you polish too much and the bit is not held securely in the collet and flies out when the router is under load.
Another technique is to sand a slight chamfer on the end of the bit to help it slide into the collet.
Or return it and try another brand.

I hope this information allows you to resolve this issue. If you need further assistance, please post back with a comment to this thread.
If I've managed to answer your question or solve a problem, please take just a moment to rate this post....thanks!

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good luck

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