This 11-piece lot of CAT40 ER collet chuck holders provides a large, single-type inventory of one of the most versatile holders in milling. ER collet chucks accept a wide range of shank diameters within their collet range, allowing a single holder to run multiple tool sizes — which translates directly to fewer holders needed overall and faster changeovers during setup. Compared to end mill holders or side-lock holders, ER collet chucks offer significantly more flexibility across tool diameters and are the preferred choice for shops running high-mix parts where tooling changes are frequent and versatility outweighs the marginal torque advantage of dedicated end mill holders. MakeMixed ModelCAT40 Year2010 or older Product #16384 Price Please login to see price. Make an Offer Get a Quote Share Ask a Question About This Machine Eleven CAT40 ER collet chuck holders — the workhorses of any CAT40 machine tool cabinet. ER collet chucks handle everything from small end mills to large drills with the kind of low runout that keeps part quality consistent all shift long. **All descriptions and specifications are preliminary and must be verified prior to purchase.** Live Tooling / Milling Specifications Spindle Second Spindle Tool Changer Turret Control Tailstock / Steadyrest Options Product Description: Includes ER Collet Chucks CAT40 Taper 11 Pieces