{"product_id":"accupro-775352-end-mill-holder-r8-taper-shank","title":"Accupro 775352 End Mill Holder R8 Taper Shank","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe ACCUPRO 775352 is an R8 taper shank end mill holder designed for use in milling machines equipped with an R8 spindle. It accepts a 3\/4-inch tool shank and provides a 2.37-inch projection from the spindle face, giving clearance for a wide range of milling operations. The holder is precision-ground to a TIR (Total Indicator Runout) of 0.0002 inches, supporting accurate, repeatable cuts. The drawbar thread is 7\/16-20, which matches standard R8 spindle drawbar configurations. Machinists and toolroom technicians install this holder to secure end mills, slot drills, and similar shank tooling in manual and CNC knee mills.\u003c\/p\u003e\n\u003cp\u003eThis end mill holder is suited for manual knee mills, Bridgeport-style machines, and similar equipment that use the R8 taper spindle standard. It is appropriate for general machining environments including job shops, toolrooms, and maintenance facilities. The 3\/4-inch bore accommodates common end mill shank sizes used in ferrous and non-ferrous material removal operations. Through-coolant is not supported on this holder, making it best suited for air blast or flood coolant applied externally at the cutting zone.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eR8 taper shank for direct mounting in R8-spindle milling machines\u003c\/li\u003e\n  \u003cli\u003e3\/4-inch bore diameter accepts standard end mill shanks\u003c\/li\u003e\n  \u003cli\u003e2.37-inch projection provides clearance for workpiece and fixture access\u003c\/li\u003e\n  \u003cli\u003eTIR of 0.0002 inches for precise, low-runout tool holding\u003c\/li\u003e\n  \u003cli\u003e7\/16-20 drawbar thread matches standard R8 spindle drawbar\u003c\/li\u003e\n  \u003cli\u003eNo through-coolant — compatible with external flood or air blast cooling\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement and standard tooling option for milling machines with an R8 taper spindle and a 7\/16-20 drawbar thread.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by machinists or toolroom technicians. Power down and lock out the machine spindle before inserting or removing the holder. Insert the R8 taper into the spindle bore, align the keyway, and tighten the drawbar to secure the holder — do not over-torque the drawbar as this can damage the taper or drawbar thread. Confirm TIR with a test indicator after installation before beginning any cutting operation.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\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: R8\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHole Diameter\u003c\/strong\u003e: 3\/4 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProjection\u003c\/strong\u003e: 2.37 inches (60.19 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTIR\u003c\/strong\u003e: 0.0002 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrawbar Thread Size\u003c\/strong\u003e: 7\/16-20\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThrough Coolant\u003c\/strong\u003e: No\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: 775352\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ACCUPRO","offers":[{"title":"Default Title","offer_id":51729145102642,"sku":"775352","price":96.17,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/0cbed48d02e47dc02c9cc8fa448bf245.jpg?v=1788700813","url":"https:\/\/voomisupply.com\/products\/accupro-775352-end-mill-holder-r8-taper-shank","provider":"Voomi Supply","version":"1.0","type":"link"}