Rego-Fix is the Swiss precision-toolholding company that invented the ER collet system, and its holders have a reputation for tight runout, balance and rigidity that has made them a trusted choice in high-precision milling and machining-center environments. These holders use the HSK-A63 interface, a hollow-taper connection that seats on both the taper and the spindle face at the same time for high accuracy, repeatability and rigidity at elevated spindle speeds. Manufactured in Switzerland, Rego-Fix HSK-A63 holders are engineered for total system runout as tight as 0.0003 inch TIR, balanced for high-speed operation, and built with vibration-damping construction that helps extend tool life and improve surface finish. Across its HSK-A63 offering, Rego-Fix spans its core clamping systems - the industry-standard ER collet chuck (DIN 6499), the high-accuracy powRgrip (PG) press-fit system, and the micRun (MR) micro-tool system - in a range of collet capacities and projection lengths, many coolant-through capable for demanding cutting conditions. The result is a repeatable, high-integrity connection between spindle and cutting tool that supports precise, productive machining across a wide variety of materials and operations. The clearest upgrade these holders represent is the HSK-A63 interface itself, a modern replacement for the older CAT40 and BT40 steep-taper (V-flange) holders that came before it. Where a steep-taper holder contacts the spindle on the taper alone and can pull axially out of position at high RPM, the HSK-A63 hollow shank contacts the spindle on both the taper and the face at once, and the shank expands under drawbar force to lock in place - delivering better rigidity, tighter axial (Z) repeatability and far more stability at high spindle speeds. That dual-contact design means more consistent tool lengths from change to change, less runout, reduced chatter and better surface finishes, especially in high-speed and high-precision work. Paired with Rego-Fix's Swiss-made build quality, choosing these HSK-A63 holders over legacy steep-taper tooling is a straightforward upgrade in accuracy and repeatability - and buying them used puts that premium performance on your spindle at a fraction of new-tooling cost. MakeRego-Fix ModelHSKA-63 Year2010 or older Product #17486 Price Please login to see price. Make an Offer Get a Quote Share Ask a Question About This Machine Cheap tool holders quietly cost you every day - in chatter, blown tolerances, and end mills that die too soon - so grabbing genuine Swiss-made Rego-Fix HSK-A63 holders at a used price is margin you can feel on the first cut. Rego-Fix has set the world standard in precision tool clamping since inventing the ER collet, and these HSK-A63 holders give your spindle the tight runout, balance and rigidity it takes to hold finishes and protect your tooling job after job. **All descriptions and specifications are preliminary and must be confirmed by buyer prior to purchase.** Live Tooling / Milling Specifications Spindle Second Spindle Tool Changer Turret Control Tailstock / Steadyrest Options Product Description: Rego-Fix HSKA63 Toolholders with Misc. Tooling