{"product_id":"accupro-775688-er20-collet-chuck-cat50-taper-shank","title":"Accupro 775688 ER20 Collet Chuck CAT50 Taper Shank","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe ACCUPRO 775688 is an ER20 collet chuck designed for precision CNC milling and machining applications. It accepts ER20 collets with a capacity range of 0.039 to 0.511 inches, providing versatility across a wide range of tooling diameters. The chuck mounts via a CAT50 taper shank and features an 8-inch projection from the spindle face, making it suitable for deep-reach machining setups. Total Indicator Runout (TIR) is rated at 0.0002 inches, supporting tight-tolerance work. Through-coolant capability, compatible with through-spindle and DIN flange coolant delivery, keeps cutting tools and workpieces cooled during high-speed operations. The chuck is balanced to 25,000 RPM. Licensed machinists and CNC toolroom technicians are the primary installers.\u003c\/p\u003e\n\u003cp\u003eThis collet chuck is intended for use in CNC machining centers equipped with CAT50 spindle interfaces. The 8-inch projection suits applications where standard-length toolholders cannot reach the cutting zone, such as deep-cavity mold work or tall-fixture setups. The ER20 collet system is a widely used standard in production and job-shop environments, accommodating a broad range of end mills, drills, and reamers within the capacity range. The 1.38-inch collet nut diameter provides adequate clamping engagement with standard ER20 collets.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eER20 collet system with 0.039 to 0.511 inches capacity range\u003c\/li\u003e\n  \u003cli\u003eCAT50 taper shank for compatibility with CAT50 spindle machines\u003c\/li\u003e\n  \u003cli\u003e0.0002 inches TIR for precision, tight-tolerance machining\u003c\/li\u003e\n  \u003cli\u003e8-inch projection for extended-reach tooling setups\u003c\/li\u003e\n  \u003cli\u003eThrough-coolant capable via through-spindle and DIN flange delivery\u003c\/li\u003e\n  \u003cli\u003eBalanced to 25,000 RPM for high-speed machining operations\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use with CAT50 spindle machining centers and standard ER20 collets. Through-coolant function requires through-spindle or DIN flange coolant delivery on the host machine.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation and toolholder changes should be performed by a qualified CNC machinist or toolroom technician with the machine powered down and spindle fully stopped. Use a calibrated torque wrench with the appropriate ER20 collet nut spanner to seat the collet and secure tooling. Verify TIR with a dial indicator after installation before returning the spindle to service. Inspect the CAT50 taper and spindle bore for contamination or damage prior to mounting.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\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: 8 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\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\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\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: 775688\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ACCUPRO","offers":[{"title":"Default Title","offer_id":51734715662642,"sku":"775688","price":302.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/a392f1310118ce4a28365670262c839b.jpg?v=1788765781","url":"https:\/\/voomisupply.com\/products\/accupro-775688-er20-collet-chuck-cat50-taper-shank","provider":"Voomi Supply","version":"1.0","type":"link"}