Finding the right collet

Since we have been working on our new CNC machine we have run into a slight problem with our new Rotozip spindle system. It seems that the smallest collet that you can get for a Rotozip is 1/8th of an inch, so we have a problem. the Dremel bits we use for cutting PCB’S ( printed circuit boards ) has a shaft diameter of 3/32. We tried to adjust a Dremel collet and we tried to chuck a modified 3/32 replaceable countersink bit, both of which produced an unacceptable wobble in our bit. Wobbling is not good when you are cutting traces that are less than 3/4mm wide.

Well we searched the web and contacted the people from ProCustom Hobbies, once I told them what I was doing they were very helpful in helping me find what I needed even though they did not stock the item. They even told me where I could get it, you just don’t get that kind of service often these days. My hat is off to these gentlemen and I encourage anyone needing hobby supplies to check out their site or give them a call.

Back to the solution, there are two Dremel chucks (made by Gyros Precision Tools, Inc.) designed to chuck smaller than 1/8th of an inch. Finally something that we can use to cut tiny paths.