{"product_id":"accupro-775684-er20-collet-chuck-cat50-taper-shank","title":"Accupro 775684 ER20 Collet Chuck CAT50 Taper Shank","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe ACCUPRO 775684 is an ER20 collet chuck with a CAT50 taper shank, designed for use in CNC machining centers where tool-holding precision and rigidity are critical. It accepts ER20 collets with a capacity range of 0.039 to 0.511 inches, making it compatible with a wide range of cutting tool shank diameters. The chuck features a 4-inch projection from gauge line, a total indicator runout (TIR) of 0.0002 inches, and is balanced to 25,000 RPM. Through-coolant capability allows coolant delivery directly through the spindle or via DIN flange, supporting high-speed and high-precision machining operations. Installation is performed by qualified machinists and CNC setup technicians.\u003c\/p\u003e\u003cp\u003eThis collet chuck is suited for CNC vertical and horizontal machining centers equipped with CAT50 spindle interfaces. The ER20 collet system accommodates a broad range of end mills, drills, reamers, and taps within its capacity range. The 4-inch projection makes it appropriate for applications requiring clearance from the spindle face, such as deep-pocket milling or tall workpiece fixturing. The through-coolant design supports chip evacuation and thermal control in demanding cutting conditions.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eER20 collet system with 0.039 to 0.511 inch capacity range\u003c\/li\u003e\n\u003cli\u003eCAT50 taper shank for compatibility with standard CAT50 spindle interfaces\u003c\/li\u003e\n\u003cli\u003e0.0002 inch TIR for high-precision tool holding\u003c\/li\u003e\n\u003cli\u003e4-inch projection from gauge line for extended reach applications\u003c\/li\u003e\n\u003cli\u003eThrough-coolant compatible via through-spindle and DIN flange coolant delivery\u003c\/li\u003e\n\u003cli\u003eBalanced to 25,000 RPM for high-speed machining\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use with CNC machining centers equipped with a CAT50 spindle taper. Accepts standard ER20 collets. Collet nut diameter is 1.38 inches.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and tool changes should be performed by a qualified machinist or CNC setup technician with the machine powered down and the spindle fully stopped. Use the appropriate ER20 collet nut wrench and spanner to achieve proper clamping torque per the collet manufacturer guidelines. Verify through-coolant connections and sealing before operation at elevated RPM. Inspect TIR at initial setup and after any tool change to confirm runout is within tolerance for the application.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCollet System\u003c\/strong\u003e: ER\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCollet Series\u003c\/strong\u003e: ER20\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Taper\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTaper Size\u003c\/strong\u003e: CAT50\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimum Collet Capacity\u003c\/strong\u003e: 0.039 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Collet Capacity\u003c\/strong\u003e: 0.511 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProjection\u003c\/strong\u003e: 4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTIR\u003c\/strong\u003e: 0.0002 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCollet Nut Diameter\u003c\/strong\u003e: 1.38 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThrough Coolant\u003c\/strong\u003e: Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoolant Type\u003c\/strong\u003e: Through-Spindle and DIN Flange\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBalanced To RPM\u003c\/strong\u003e: 25,000 RPM\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 1 pound\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: ACCUPRO\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 775684\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ACCUPRO","offers":[{"title":"Default Title","offer_id":51748941332786,"sku":"775684","price":185.04,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/855e81b3327484e338df4fc350d65f9c.jpg?v=1788900256","url":"https:\/\/voomisupply.com\/products\/accupro-775684-er20-collet-chuck-cat50-taper-shank","provider":"Voomi Supply","version":"1.0","type":"link"}