{"product_id":"accupro-772090-end-mill-holder-cat40-1-1-4-in-hole","title":"Accupro 772090 End Mill Holder CAT40 1-1\/4 in Hole","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe ACCUPRO 772090 is a CAT40 taper shank end mill holder designed for CNC machining centers requiring precise tool holding with through-coolant capability. It accepts a 1-1\/4 inch bore and delivers a 4 inch projection from the spindle face, making it suitable for operations where extended reach is needed. The holder features a 2.5 inch nose diameter, a clamping depth of 2.55 inches, and a total indicator runout (TIR) of 0.0002 inch, supporting high-accuracy milling work. Balanced to 30,000 RPM, it is suited for high-speed machining environments. Installation is performed by machinists and CNC setup technicians in production and job shop settings.\u003c\/p\u003e\u003cp\u003eThis end mill holder is used in CNC vertical and horizontal machining centers equipped with CAT40 spindle interfaces. The through-coolant design supports both through-spindle and DIN flange coolant delivery, directing fluid directly to the cutting zone for improved chip evacuation and tool life in demanding milling applications. The 6.75 inch overall length and 4 inch projection make it a practical choice for setups requiring clearance between the spindle nose and workpiece or fixture. It is a standard fitment for production shops running CAT40-tooled machining centers.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eCAT40 taper shank for compatibility with CAT40-spindle CNC machining centers\u003c\/li\u003e\n\u003cli\u003e1-1\/4 inch bore diameter with 2.55 inch clamping depth for secure end mill retention\u003c\/li\u003e\n\u003cli\u003eThrough-coolant design supporting through-spindle and DIN flange coolant delivery\u003c\/li\u003e\n\u003cli\u003eTIR of 0.0002 inch for high-precision tool concentricity\u003c\/li\u003e\n\u003cli\u003eBalanced to 30,000 RPM for high-speed machining applications\u003c\/li\u003e\n\u003cli\u003eDrawbar and retention knob thread size of 5\/8-11 for standard CAT40 tooling compatibility\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard OEM-style replacement or new-installation end mill holder for CNC machining centers with a CAT40 spindle interface and 5\/8-11 drawbar thread specification.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a qualified machinist or CNC tooling technician. Power down and lock out the machining center spindle before installing or removing any tooling. Verify drawbar engagement and retention knob torque per the machine tool manufacturer specifications before operation. Confirm through-coolant fittings and seals are properly seated before resuming coolant flow.\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\u003eHole Diameter\u003c\/strong\u003e: 1-1\/4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNose Diameter\u003c\/strong\u003e: 2-1\/2 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProjection\u003c\/strong\u003e: 4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 6.75 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClamping Depth\u003c\/strong\u003e: 2.55 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTIR\u003c\/strong\u003e: 0.0002 inches (0.005 mm)\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\u003eDrawbar Thread Size\u003c\/strong\u003e: 5\/8-11\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\u003eBalanced To\u003c\/strong\u003e: 30,000 RPM\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Dimensions\u003c\/strong\u003e: 8.5 inches L x 3 inches W x 3 inches H\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 4.2 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: 772090\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ACCUPRO","offers":[{"title":"Default Title","offer_id":51750095847730,"sku":"772090","price":137.78,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/996de0fd9b5bd8b55678feb758b755ae.jpg?v=1788913594","url":"https:\/\/voomisupply.com\/products\/accupro-772090-end-mill-holder-cat40-1-1-4-in-hole","provider":"Voomi Supply","version":"1.0","type":"link"}