{"product_id":"accupro-777658-cat40-milling-chuck-1-1-4-in-through-coolant","title":"Accupro 777658 CAT40 Milling Chuck 1-1\/4 in Through Coolant","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe ACCUPRO 777658 is a CAT40 milling chuck designed for secure tool holding in CNC machining centers. It features a 1.25-inch hole diameter and a CAT40 taper shank for positive engagement with the spindle. The nose diameter measures 2.88 inches, and the projection is 3.54 inches, making it suitable for a range of milling operations where tool reach and rigidity are critical. Through-spindle coolant capability directs cutting fluid directly to the tool tip, improving chip evacuation and extending tool life. The chuck is balanced to 10,000 RPM, supporting high-speed milling applications. Installation is performed by qualified CNC machinists or toolroom personnel.\u003c\/p\u003e\n\u003cp\u003eThis CAT40 milling chuck fits vertical and horizontal machining centers equipped with a CAT40 spindle interface. The 1.25-inch bore accommodates standard milling shanks of that diameter. With a clamping depth of 3.34 inches and a TIR of 0.0002 inches, this chuck delivers the concentricity required for finish milling, contouring, and general-purpose cutting operations in production or job-shop environments. The through-coolant feature makes it particularly well suited to deep-pocket milling and hard-material applications where heat management is a priority.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eCAT40 taper shank for direct spindle mounting on compatible machining centers\u003c\/li\u003e\n  \u003cli\u003e1.25-inch hole diameter with 3.34-inch clamping depth for secure tool engagement\u003c\/li\u003e\n  \u003cli\u003eThrough-spindle coolant support directs fluid to the cutting zone\u003c\/li\u003e\n  \u003cli\u003eTIR of 0.0002 inches ensures high concentricity for precision milling\u003c\/li\u003e\n  \u003cli\u003eBalanced to 10,000 RPM for stable high-speed operation\u003c\/li\u003e\n  \u003cli\u003eNose diameter of 2.88 inches and projection of 3.54 inches suit a wide range of milling setups\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use in CNC machining centers with a CAT40 spindle taper interface and through-spindle coolant capability.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a qualified CNC machinist or toolroom technician. Ensure the spindle and chuck taper are clean and free of chips or oil film before seating the holder. Use a properly calibrated pull-stud torque procedure per the machine tool manufacturer's specifications. Verify tool runout with a dial indicator after clamping before initiating any cutting cycle.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTaper Size\u003c\/strong\u003e: CAT40\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Taper\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHole Diameter\u003c\/strong\u003e: 1.25 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNose Diameter\u003c\/strong\u003e: 2.88 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProjection\u003c\/strong\u003e: 3.54 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eClamping Depth\u003c\/strong\u003e: 3.34 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTIR\u003c\/strong\u003e: 0.0002 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoolant Type\u003c\/strong\u003e: Through-Spindle\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBalanced To RPM\u003c\/strong\u003e: 10,000 RPM\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 5.2 pounds\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: 777658\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ACCUPRO","offers":[{"title":"Default Title","offer_id":51740674556210,"sku":"777658","price":325.17,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/d6abcd06d96c20b43b65111129287fa1.jpg?v=1788826642","url":"https:\/\/voomisupply.com\/products\/accupro-777658-cat40-milling-chuck-1-1-4-in-through-coolant","provider":"Voomi Supply","version":"1.0","type":"link"}