{"product_id":"accupro-775010-end-mill-holder-cat40-5-16-inch-through-coolant","title":"Accupro 775010 End Mill Holder CAT40 5\/16 Inch Through Coolant","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe ACCUPRO 775010 is a CAT40 taper shank end mill holder designed for secure tool retention in vertical and horizontal machining centers. It accepts a 5\/16 inch bore and features a 2.5 inch projection with a 1 inch nose diameter. Through-coolant capability routes cutting fluid directly to the tool tip, supporting high-speed and high-precision milling operations. The holder is balanced to 30,000 RPM and carries a total indicator runout (TIR) of 0.0002 inch, making it suitable for tight-tolerance work in production environments. A 5\/8-11 drawbar thread provides standard spindle engagement.\u003c\/p\u003e\n\u003cp\u003eThis end mill holder is used in CNC machining centers running CAT40 spindles, common in both job-shop and production-floor settings. The 2.5 inch projection suits applications where clearance is needed for deep-pocket milling or where the tool must extend past a workholding fixture. Through-spindle and DIN flange coolant compatibility gives the user flexibility across different machine configurations. Machinists and toolroom technicians are the primary users for installation and setup.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eCAT40 taper shank for standard machining center spindle compatibility\u003c\/li\u003e\n  \u003cli\u003e5\/16 inch bore accepts standard end mill shanks\u003c\/li\u003e\n  \u003cli\u003e2.5 inch projection for reach in deep-pocket or fixure-clearance applications\u003c\/li\u003e\n  \u003cli\u003eThrough-coolant capable via through-spindle and DIN flange coolant types\u003c\/li\u003e\n  \u003cli\u003eBalanced to 30,000 RPM for high-speed machining\u003c\/li\u003e\n  \u003cli\u003eTIR of 0.0002 inch for precise tool runout control\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement and standard tooling solution for CNC machining centers equipped with CAT40 spindles and using 5\/8-11 drawbar thread engagement.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation and tool changes should be performed by a qualified machinist or toolroom technician with the machine fully powered down and the spindle at rest. Use a torque wrench and the machine manufacturer's drawbar tightening procedure — do not rely on hand-tightening alone. Verify TIR with a dial indicator after seating the holder before beginning any cutting operation. Ensure the coolant supply line is compatible with through-spindle delivery before enabling through-coolant flow.\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: CAT40\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHole Diameter\u003c\/strong\u003e: 5\/16 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNose Diameter\u003c\/strong\u003e: 1 inch\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\u003eDrawbar Thread Size\u003c\/strong\u003e: 5\/8-11\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBalanced To RPM\u003c\/strong\u003e: 30,000 RPM\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTIR\u003c\/strong\u003e: 0.0002 inch\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: 775010\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ACCUPRO","offers":[{"title":"Default Title","offer_id":51731039224114,"sku":"775010","price":100.45,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/91be7d23ae7756b40bb54139d9bba34e.jpg?v=1788726149","url":"https:\/\/voomisupply.com\/products\/accupro-775010-end-mill-holder-cat40-5-16-inch-through-coolant","provider":"Voomi Supply","version":"1.0","type":"link"}