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

probably not as the shanks of the router bits fit in the spindle shaft of the router which is around 1/2" dia
could always talk with manufacturer as to find an adaptor or like bit of equipment

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The two sizes (in the US) for router bit shanks (and collets) are 1/4 inch and 1/2 inch. Some routers use only a 1/4 inch collet. Routers with a 1/2 inch collet also come with a 1/4 inch collet. You need a 1/2 inch collet to hold a 1/2 inch shank. Good luck.

On some models the collet stays put on purpose. You don't have to remove the nut either. But if you really do have to remove the collet and it is the type that is supposed to come out (maybe you need to use the 1/4 inch collet) then just stick a bit into it without the nut and give the bit a sideways whack with a piece of wood. If the collet has been pressed in tight by the nut without a bit in place, then you won't be able to fit a bit into it, and maybe the collet is ruined. Find the largest diameter shaft you can to fit into the hole and pop that sideways. Good luck.

Do you have the collet upside down? It should fit in nicely and the lock nut fit over the top, no problem, If it doesn't, something is wrong. They only make 2 sizes of collets for router bits, 1/4 and 1/2 , if they get their parts from somebody who makes just collets, you could have easily gotten a different size in there. See if a router bit will fit the hole, then go to the store where you bought the router and ask them to try it in your router and see if it fits, they might have collets on the shelf. Check it out.

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

I put in a bit that fitted the existing collet. When I took this out, the collet came with it.

On my older Sears router there is a lever on the base near the collet nut that you slide to engage the motor shaft to lock the motor shaft for bit changes. On newer models you may have a button or different mechanism to lock the shaft. After the shaft is locked you can use a small wrench to loosen the collet nut, usually by turning it counter-clockwise (viewed from the base). Once the nut is loose the bit should slide out (sometimes the bit is stuck in the collet and the nut may need to come all the way off to get them apart). Just replace the bit with a new bit with the same shaft diameter, tighten the nut, and you are set. If the new bit has a different shaft diameter than the old bit you may need to change the collet also (in general, different collets are used with different bit shaft diameters).

could be a couple things. First how is the shank on the bit e.g. is it worn down, second is it the right size for the collet being used (have to ask) and what is the condition of the collet and collet nut. What I would do is make sure there is nothing to prevent from completely tightening the collet nut. Also make sure if the collet locks into the nut that it is properly installed. Lastly make sure that you use the wrenches provided to tighten the assembly. If this doesn't help please provide the model number and brand and I will do some more research.

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.

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