Dremel repair: The motor spins

I use heat shrink and found one that was larger and cut it down to less than an inch. I heated it with a lighter enough to fit the same size over it. and then heated that one enough to slip inside. I did one more so I ended up with 3 of the same heat shrink tubing (pink) and covered over both of the shafts and heated the whole thing so they all sealed and made a connecting shaft. In a pinch it worked well and never had a problem. there is a picture attached.

I had the same problem. It looked like the original part was surgical tubing. I used a 1 inch long piece of 1/4 inch ID TYGON tube 1/16 wall. Works great so far..

My Dremel is about twenty years old (model 285-3) and the plastic connecting piece crumbled with age. I called the Dremel company and gave them the part number from my parts list. The part is called a flex chuck, however I do not have the new part number. The person answering the phone knew what I needed and for about a dollar plus $2.00 shipping, I should be able to repair the Dremel like new.

Dremel 1-800-437-3635