This 12-piece CAT40 ER collet chuck lot provides full carousel coverage for most machining centers, allowing operators to pre-set tools across an entire job without reusing holders between operations. ER collet chucks are the most versatile CAT40 holder type available, handling end mills, drills, reamers, and boring bars across the same collet range with consistent low runout. For shops running lights-out or unattended machining, a large ER collet holder inventory like this is essential — pre-loaded tools stay in holders between runs, reducing setup time and the risk of runout variation introduced by re-coleting tools at the machine between shifts. MakeMixed ModelCAT40 Year2010 or older Product #16408 Price Please login to see price. Make an Offer Get a Quote Share Ask a Question About This Machine Twelve CAT40 ER collet chucks — enough to keep a machining center running multiple concurrent tool setups without pulling holders between jobs. An ER collet lot this size is a genuine production asset, not just a toolholder fill. **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 Machine Used On: CAT40 (V-Flange 40-Taper) CNC Vertical & Horizontal Machining Centers Product Description: ER Collet Chucks CAT40 Taper 12 Pieces Mixed Manufacturers 40-Taper V-Flange (ANSI/ASME B5.50) Retention knob thread 5/8-11 (standard CAT40) Buyer to confirm all specifications before purchasing.