{"product_id":"accupro-775007-cat40-end-mill-holder-1-4-in-bore","title":"Accupro 775007 CAT40 End Mill Holder 1\/4 in Bore","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe ACCUPRO 775007 is a CAT40 taper shank end mill holder designed for precision CNC milling applications. It accepts a 1\/4 inch bore and provides a 2.5 inch projection from the spindle face, giving operators clearance for a wide range of end mill lengths. The holder features through-coolant capability, supporting both through-spindle and DIN flange coolant delivery. It is balanced to 30,000 RPM and holds a TIR of 0.0002 inches, making it suitable for high-speed finishing and tight-tolerance work. Machinists and CNC setup technicians are the primary users of this toolholder.\u003c\/p\u003e\u003cp\u003eThis end mill holder is used in CAT40-spindle machining centers for milling, profiling, slotting, and contouring operations. The through-coolant design directs cutting fluid directly to the tool tip, extending tool life and improving chip evacuation in ferrous and non-ferrous materials. It is a practical choice for production shops running high-RPM spindles where runout control and coolant delivery are critical to part quality.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eCAT40 taper shank for direct spindle mounting on CAT40 machining centers\u003c\/li\u003e\n\u003cli\u003e1\/4 inch bore diameter for standard end mill shanks\u003c\/li\u003e\n\u003cli\u003e2.5 inch projection for clearance in deep-reach applications\u003c\/li\u003e\n\u003cli\u003eThrough-coolant compatible via through-spindle and DIN flange delivery\u003c\/li\u003e\n\u003cli\u003eTIR of 0.0002 inches for high-precision runout control\u003c\/li\u003e\n\u003cli\u003eBalanced to 30,000 RPM for high-speed machining operations\u003c\/li\u003e\n\u003cli\u003e5\/8-11 drawbar thread for secure spindle retention\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style end mill holder for CAT40-spindle CNC machining centers equipped with through-spindle or DIN flange coolant systems.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by qualified CNC machinists or toolroom technicians. Power down and lock out the spindle drive before inserting or removing the toolholder. Use the appropriate torque wrench and collet nut spanner to secure the end mill to manufacturer-specified clamping torque — do not overtighten by hand or use impact tools. Verify runout at the tool tip with a dial test indicator after installation before initiating any cutting cycle.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: CAT40 Taper\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBore Diameter\u003c\/strong\u003e: 1\/4 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNose Diameter\u003c\/strong\u003e: 20.00 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProjection\u003c\/strong\u003e: 2.5 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\u003eTIR\u003c\/strong\u003e: 0.0002 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBalanced To\u003c\/strong\u003e: 30,000 RPM\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrawbar Thread Size\u003c\/strong\u003e: 5\/8-11\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: 775007\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ACCUPRO","offers":[{"title":"Default Title","offer_id":51727423897906,"sku":"775007","price":99.29,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/bdea869d69f24f37a9e8b5ac4376550e.jpg?v=1788677747","url":"https:\/\/voomisupply.com\/products\/accupro-775007-cat40-end-mill-holder-1-4-in-bore","provider":"Voomi Supply","version":"1.0","type":"link"}