{"product_id":"accupro-772032-cat40-end-mill-holder-3-8-inch-through-coolant","title":"Accupro 772032 CAT40 End Mill Holder 3\/8 Inch Through Coolant","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe ACCUPRO 772032 is a CAT40 taper shank end mill holder designed for CNC machining centers requiring precise tool retention and internal coolant delivery. The holder accepts a 3\/8 inch bore and provides 2.5 inches of projection, making it well suited for applications that demand clearance between the spindle face and the workpiece. With a total indicator runout (TIR) of 0.0002 inches and a balance rating of 30,000 RPM, this holder supports high-speed finishing operations where concentricity directly affects surface finish and tool life. A licensed machinist or CNC setup technician is the typical installer.\u003c\/p\u003e\u003cp\u003eThis end mill holder fits CNC vertical and horizontal machining centers equipped with a CAT40 spindle interface. The 1-17\/64 inch nose diameter and 1.26 inch clamping depth provide secure engagement for standard end mills with a 3\/8 inch shank. The through-spindle and DIN flange coolant compatibility allows directed coolant flow to the cutting edge, reducing heat buildup during extended cutting cycles. It is appropriate for production and job-shop environments running steel, aluminum, and other common workpiece materials at elevated spindle speeds.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eCAT40 taper shank for direct spindle mounting on standard CNC machining centers\u003c\/li\u003e\n\u003cli\u003e3\/8 inch bore with 1.26 inch clamping depth for secure end mill retention\u003c\/li\u003e\n\u003cli\u003e2.5 inch projection for clearance in deep-cavity and shouldered-part applications\u003c\/li\u003e\n\u003cli\u003eTIR of 0.0002 inches supports high-precision finishing and extended tool life\u003c\/li\u003e\n\u003cli\u003eBalanced to 30,000 RPM for compatibility with high-speed spindle applications\u003c\/li\u003e\n\u003cli\u003eThrough-spindle and DIN flange coolant delivery directs flow to the cutting zone\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement and direct-fit tool holder for CNC machining centers with a CAT40 spindle interface accepting a 5\/8-11 retention knob thread.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by a qualified CNC machinist or toolroom technician. Power down and lock out the machining center before inserting or removing the holder from the spindle. Use a torque wrench and the machine manufacturer's recommended procedure when tightening the retention knob to the drawbar. Inspect the taper shank and spindle bore for chips or contamination before seating the holder, as debris will affect runout and balance.\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: 3\/8 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNose Diameter\u003c\/strong\u003e: 1-17\/64 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProjection\u003c\/strong\u003e: 2.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 5.187 inches (131.74 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClamping Depth\u003c\/strong\u003e: 1.26 inches\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\u003eThrough Coolant\u003c\/strong\u003e: Yes, Through-Spindle and DIN Flange\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRetention Knob Thread Size\u003c\/strong\u003e: 5\/8-11\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Dimensions\u003c\/strong\u003e: 7 inches L x 3 inches W x 3 inches H\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 2.4 pounds\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: 772032\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ACCUPRO","offers":[{"title":"Default Title","offer_id":51738652213554,"sku":"772032","price":138.47,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/7a7bcad83f9b4b7bc803181f66a6fc9d.jpg?v=1788802359","url":"https:\/\/voomisupply.com\/products\/accupro-772032-cat40-end-mill-holder-3-8-inch-through-coolant","provider":"Voomi Supply","version":"1.0","type":"link"}