Quote Originally Posted by Jeff_Birt View Post
I think you have an excellent idea, but I think it will be easier for most folks to replicate by starting with a 1/2" shank collet chuck.
I see two problems with starting with a 1/2 inch shank. First is that you would have to buy an expensive holder because you need would need the accuracy. Second, the holder would be way too long. If you want to make an adapter which fits in like the CT press on adapter, you really have to turn a holder down. I even turned off some of the extra threads which the nut did not reach. The thing has to be compact.

I will see how much Maritool would charge to make these things. Maritool would make high quality, hardened works of art. He quoted me at $138 each for ER16 spindles back in the day. These adapters are much simpler. If they came in under $50, I think they would be worth it.