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 #17488 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