This happened to me the first time I used and for less than an hour. I went to change the bit and the lock button seems to pop while trying to loosen the collar. I WD40 it and tried using a vice grip and still no luck. So I registered it as I just got it and now I guess I am sending it in to be repaired and or replaced. Was disappointed I couldn't continue to use it, but liked the 2050 stylo and what it achieved regardless. Hope they help me.
This can happen if you accidentally depress the spindle locking button while the tool is running -- a common problem since Dremel did not include any type of interlock to prevent it, and the button is right where you'd hold the tool for best control. If that happens, you probably will need to replace the tool or send it to Dremel for repair.
SOURCE: Craftsman rotary tool doesn't lock down on the bits.
the collet is either the wrong size for the shaft on the attachment or is missing alltogether
SOURCE: My Dremel lock nut won't budge. My collet is
You'll need to use either the built in shaft lock to hold the collet in a fixed position, or use a pair of slip joint pliers to hold the shaft of the bit, while you use the wrench to loosen the collet. Slow and steady should get it loose. Another option is use some penetrating oil sprayed lightly onto the back of the collet to help loosen it from the shaft etc.
SOURCE: 400 XPR - I am trying to remove a saw attachment.
The attachment is 'keyed to the motor assembly so it will only go on in one direction. If it was mistakingly forced on in a different manner it can get jammed. Try twisting it from left to right while pulling straight out.
SOURCE: I have a collet nut that will not loosen. at one
Sorry, but I seem to have ( essentially ) the same problem... no positive lock. holding the button down while rotating the shaft to find the "best hold" then applying extra pressure sometimes helps. I had no problem with an older model. 400 XPR also seems to overhheat badly.
My ultimate solution: purchasing the model 4000.
SOURCE: can't unscrew collet
it is possible that you stripped lock mechanism on the collet, for the beginning, never, ever, use wrench to tighten the collet! just hand tied, if it slips, tight it bit more, but with hands only.
i never used wrench on the collet and never have any trouble with any of my dremels.
to close, just hold firmly in one hand pressing locket button, tighten up with other hand, to undo, reverse procedure.
if you find bit is too lose, then you have collet inserts, find that one which hold bit firmly and use it on this particular bit. standard collet is 1/8" (3.175mm), but in the set there are collets from 0.0394'' (1mm) to 0.177" (4.5mm). do not use wrench...
just inspect now if thread is not stripped, on spindle and on collar, if locket still hold, if these are damaged, you need to change damaged part. and follow the advice :-)
if you find this advice useful, pleasae do not hesitate leave your remark and vote4 for me, thanx!
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