{"product_id":"collis-tool-68207-end-mill-holder-cat40-3-4-inch-bore","title":"Collis Tool 68207 End Mill Holder CAT40 3\/4 Inch Bore","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe COLLIS TOOL 68207 is a CAT40 taper shank end mill holder designed for secure tool retention on vertical and horizontal machining centers. It accepts a 3\/4 inch bore and delivers a 1.375 inch projection from the gauge line to the nose, keeping the cutting tool close to the spindle for improved rigidity. The 1-3\/4 inch nose diameter provides a solid clamping surface. With a TIR of 0.0002 inch and a balance rating of 20,000 RPM, this holder suits high-speed finishing and general milling operations where runout control matters. Machinists and CNC setup technicians are the primary users.\u003c\/p\u003e\n\u003cp\u003eThis end mill holder is suited for CNC machining centers running CAT40 tooling systems. The short 1.375 inch projection makes it well matched for rigid roughing cuts or precision finishing passes where tool overhang must be minimized. The 5\/8-11 drawbar thread engages standard CAT40 spindle retention knobs. It is a common choice on vertical machining centers in job shops, tool rooms, and production environments requiring reliable, repeatable tool holding.\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\u003e3\/4 inch bore diameter for standard end mill shanks\u003c\/li\u003e\n  \u003cli\u003e1.375 inch projection for reduced overhang and improved rigidity\u003c\/li\u003e\n  \u003cli\u003eTIR of 0.0002 inch for consistent runout control at high speeds\u003c\/li\u003e\n  \u003cli\u003eBalanced to 20,000 RPM supporting high-speed machining applications\u003c\/li\u003e\n  \u003cli\u003e5\/8-11 drawbar thread compatible with standard CAT40 retention hardware\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use with CAT40 spindle tooling systems. Compatible with 3\/4 inch shank end mills. Requires a 5\/8-11 retention knob for spindle clamping. Through-coolant is not supported by this holder.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a qualified machinist or CNC technician with the spindle fully powered down and locked out. Use a torque wrench on the drawbar only to the machine manufacturer's specified value  -  do not over-torque. Inspect the taper bore and spindle taper for chips or contamination before seating the holder. Verify runout 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: CAT40 Taper\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBore Diameter\u003c\/strong\u003e: 3\/4 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNose Diameter\u003c\/strong\u003e: 1-3\/4 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProjection\u003c\/strong\u003e: 1.375 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTIR\u003c\/strong\u003e: 0.0002 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBalanced To\u003c\/strong\u003e: 20,000 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\u003eThrough Coolant\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 2.34 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: COLLIS TOOL\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 68207\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"COLLIS TOOL","offers":[{"title":"Default Title","offer_id":67912555725106,"sku":"68207","price":214.36,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/ce4adbd489edaf6c4bc26998eb4ec77f.jpg?v=1791235935","url":"https:\/\/voomisupply.com\/products\/collis-tool-68207-end-mill-holder-cat40-3-4-inch-bore","provider":"Voomi Supply","version":"1.0","type":"link"}