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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.
I feel your pain! This is not uncommon. If the bit is slipping out of the collet, it is probably due to a dull bit. The 1/4 inch shanks are more prone to this than the 1/2 inch ones, which is why most new routers use 1/2 inch. (Think about the large size as being analogous to a larger wrench being able to exert a greater torque.) However, if the problem is the housing slipping on the base, you can try wedging a little piece of sandpaper under clamp. If the clamp has a thumbscrew, use a wrench on it to tighten it just a bit more than you could possibly do it with strong fingers. It was just this problem that inspired me to ditch my old Craftsman for a Porter Cable. Good luck!
take out 4 screws on top of router. i used a large flat head but they are not flat head (some kind of combo with star type center). remove top could be a little stuck. you will see bearing in center. the magnetic ring sits underneath the bearing. you need a small bearing/gear puller to get bearing out. once out the magnetic ring goes flat side down over center shaft and then the bearing gets replaced over it. i just tapped the bearing down softly with a small hammer being careful not to break new magnetic ring.
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.
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!
I haven't seen a lincoln log in a long time, but I'd say something in the neighborhood of 3/8" round over bit would do it. It's going to depend on the size of stock you round off. Take off 1/2 or a little less than 1/2 the width of your square "blanks", and use that number as the radius of the roundover bit. If you want not a full 1/4 of a circle profile, use a little bit larger bit and don't raise it all the way out of the base to cut.
By the way, I'd recommend you use a router table to run these pieces, or you're not going to have much left to rest on for the final pass. With a router table, you can leave a square bit on each end that you don't route, (and cut off later), that guides the piece against the table and fence.
Much safer IMHO.
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 a moment to kindly rate this post....thanks!
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.