Craftsman rotary tool doesn't lock down on the bits.

Lock the spindle (small chrome button near the tool's nose or lever at the power switch). You'll probably need to rotate the spindle by hand as much as one full turn as you do this, to get the lock to drop into place.

With the spindle locked, use your supplied wrench to turn the collet nut counter-clockwise (as seen from the cutter end) about one full turn. The collet should now be plenty loose enough to release the cutter / wheel / drill.

My motor was turning but the flex shaft wouldn't. I took the flex shaft loose and spun it inside. Works fine now.

It doesn't attach anywhere, that's why it popped out. It should just fit in a recess, pushing the lock button outward.

Is it possible to grip each part with a pliers and twist and pull at the same time to release the bit? Let some oil run into the collet before you do this.

Contact Sear customer service.

You have a wrench that fits the chuck and a stop button that locks the shaft, loosen that chuck up and pull out the old bit, if it is frozen or rusted, try poking it against something solid, make it go in to break it loose, then pull out the bit. If that doesn't work, soak it in blaster or some other penetrating oil, then try the same again. Hope this helps.

DW660 is suppose to be a tool free bit insertion and removal. However a wrench may be necessary. If you have loosened the the collet nut either with the collet grip or a wrench and the bit does not come out. Remove the collet nut completely from the tool. Remove the the collet with the bit in it. With a couple of plyers, one use to hold the broken bit the other to twist the collet. Sometimes when the bit is overtighten the collet locks on to the bit so to speak and the collet wont expand back out thus releasing the bit by doing the above it will expand back out and release the bit. Reinstall the collet and collet nut.

I hope this helps, thanks for using FIXYA. Good luck and have a great weekend. Jeff

There should be a spindle lock near the collet end of the tool. Engage it and then put the wrench on the collet nut and loosen the nut. If the bit is stuck just tap the end of it slightly to loosen it and it should come out. Reverse this process to install a new bit...hope this helps you...Jeepfxr

If you are asking how much to tighten it then it should be a little more than snug, if you want to know how to lock it to tighten I would need the model number to find out what they use. Please let me know and I will try and help

User Error! There are different diameter collets. I bet you are using a larger diameter bore collet than the bit outside diameter. Collet can be purchased at any hardware store. To remove unscrew nut, remove collet and replace with proper diameter.