Metalsmith and educator, Melissa Muir explains how to change the collet in a Foredom® K.1060 Micromotor https://www.foredom.net/product/k-1060-high-speed-brushless-micromotor-kit-with-2-35mm-3-32-and-1-8-collet/ Handpiece. The handpiece comes with both a 3/35" (2.35 mm) collet and a 1/8" collet. She also explains mistakes to avoid and the usefulness of a collet adapter. https://www.foredom.net/product/hpl4-3235-collet-adapter-3-0mm-to-3-32/
