Medicool turbo II chuck will not loosen

You screw off the collar on the tool, remove the chuck and inner part. The chuck is replaced with a special chuck (no inner piece). The special chuck has a square opening in it's nose that accepts the square end of the flex shaft inner cable. Is is actually a speedometer drive cable, from yesteryear.
Then you pull the inner cable out slightly, if it will, and put the inner cable into the square opening of the special chuck on your dremel motor. once engauged, you carefully screw the outer shaft housing on to the end of your dremel motor.
What you want to avoid is damaging this area during flex shaft assembly. I have had success with turning the output side of the flex shaft, while tightening the outer flex shaft onto the dremel motor. Stop tightening if it starts binding...
Rotation seems to help with alignment of all parts.

Cheers,

Doc

Hi there, if you go to YouTube, and type in your enquiry, you will be able to access a tutorial video showing you what you need to do,
Good luck

take it to a service agent and get a new one

Open the case, locate the two AC wires and detach. Get new cord and replace as per the previous wire attachments.

Turn the dial to left to unlock the Chuck point it downward then tab on the side of Chuck lightly with a small wooden blocks( do not use metal), eventually that broken end piece of carbide bit come out long enough to pull out with a pair of needle nose pliers, if it not successful doing this way it can be done by taking it apart, just have to be more carefully with small parts. Hope this would help, good luck!

I had a similar problem with a router, the best way to do it is to get a clamp, a strong metal c clamp, not too big but big enough to fit chuck into, line one side of clamp up with button and the other on the chuck. tighten the clamp as tight as you possibly can so it presses and holds the button in, and does not slip. Then use a wrench or whatever tool you use to undo the chuck. if this does not work, try spraying some WD40 on and leave to work for a few minutes.

Try some W-D40 and gentle hits on the coupling to liberate the chuck 3 pin holders.If you got this type of chuck:

> Enlarge Image

4486 Dremel Chuck

The Dremel Chuck holds Dremel accessories without using a collet eliminating having to use the wrench and creating quick and e

When the drill bit on a hammer drill keeps loosening up one of two things is happening. 1. The chuck is worn out and needs to be replaced. 2. The chuck is not tight enough before you start drilling. If you have the style of chuck that requires a key do not be bashful about using maximum force to tighten the chuck and move the chuck key from hole to hole and tighten it in each position. Joe

Your chuck is held onto the motor shaft by a screw located inside the chuck. This screw has loosened and requires tightening. This screw has reverse threads and in order to tighten it, you need to turn the screw in the opposite direction or in oither words, in the reverse direction.