Much has been said in this Forum about ER11 adaptors. Many seem to have bought them from eBay.

However, I have not seen many (any) comments from people who have bought them and are using them.

I would like to know a few things, so here we go:


  1. How happy are you with the adaptors themselves
  2. Do you notice any quality problems like wobble, runout, noise, quality of cut
  3. Where do you get your bits from. Can you provide part numbers, websites, prices that you have paid
  4. What are the specs for the bits that could be used with the adaptors, I suspect that the overall length is kind of critical
  5. Have you saved any money by using the adaptors and bits when compared to the bits sold expressly for the CT chuck
  6. Any other observations you would like to contribute


My motivation is to be able to continue carving at a more reasonable price, Yesterday I broke two 1/8 cutting bit because of a cut motor failure, so there goes 80 bucks plus shipping, and I am in Canada so the shipping costs is even worse.

Thanks a lot for sharing.

...Peter