{"product_id":"accupro-775003-end-mill-holder-cat40-3-16-inch-through-coolant","title":"Accupro 775003 End Mill Holder CAT40 3\/16 Inch Through Coolant","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe ACCUPRO 775003 is a CAT40 taper shank end mill holder designed for precision milling operations in CNC machining centers. It accepts a 3\/16 inch bore and delivers a 1.38 inch projection with a 3\/4 inch nose diameter. Through coolant is supported via both through-spindle and DIN flange configurations, making this holder suitable for high-speed and high-precision cutting environments. The holder is balanced to 30,000 RPM and maintains a total indicator runout (TIR) of 0.0002 inch, ensuring tight tolerances during production runs. Machinists and CNC setup technicians are the primary installers of this toolholder.\u003c\/p\u003e\u003cp\u003eThis end mill holder is used in vertical and horizontal CNC machining centers equipped with a CAT40 spindle interface. It is well suited for shops running tight-tolerance work where coolant delivery directly through the tool is required for chip evacuation and heat management. The 30,000 RPM balance rating accommodates high-speed machining applications in both job shop and production environments. The drawbar thread size is 5\/8-11, which is standard for CAT40 tooling systems.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eCAT40 taper shank for compatibility with standard CAT40 CNC spindles\u003c\/li\u003e\n\u003cli\u003e3\/16 inch bore diameter for small-diameter end mill shanks\u003c\/li\u003e\n\u003cli\u003eThrough coolant support via through-spindle and DIN flange coolant delivery\u003c\/li\u003e\n\u003cli\u003eTIR of 0.0002 inch for high-precision runout control\u003c\/li\u003e\n\u003cli\u003eBalanced to 30,000 RPM for high-speed machining suitability\u003c\/li\u003e\n\u003cli\u003eStandard 5\/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 replacement or direct-fit toolholder for CNC machining centers with a CAT40 taper spindle interface and a 5\/8-11 drawbar thread.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a qualified CNC machinist or toolroom technician. Power down and lock out the machining center before changing toolholders. Use a proper torque wrench and CAT40 tool tightening fixture when seating the end mill and securing the set screw. Verify TIR with a dial indicator after installation to confirm runout is within tolerance for the application.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\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: 3\/16 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNose Diameter\u003c\/strong\u003e: 3\/4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProjection\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\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: 775003\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ACCUPRO","offers":[{"title":"Default Title","offer_id":51744836878642,"sku":"775003","price":109.15,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/f2eb92dd0275903c078d933c18d873ca.jpg?v=1788861271","url":"https:\/\/voomisupply.com\/products\/accupro-775003-end-mill-holder-cat40-3-16-inch-through-coolant","provider":"Voomi Supply","version":"1.0","type":"link"}