The best collets for use in CNC routers and CNC mills are ER collets, the most common standard collet type used in these kinds of machines. They are standardized under ISO 6499 and available in ER-8, ER-11, ER-16, ER-20, ER-25, ER-32, ER-40, and ER-50 standard series. These collets are readily available, easy-to-use, and offer excellent clamping pressure on cylindrical tools.
Learn more about our precision-engineered ER collets.