{"product_id":"accupro-771202-cat40-shell-mill-holder-1-25-in-pilot","title":"Accupro 771202 CAT40 Shell Mill Holder 1.25 in Pilot","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe ACCUPRO 771202 is a CAT40 shell mill holder with a dual contact taper shank, designed for milling operations on CNC machining centers. It features a 1.25 inch pilot diameter, a 4 inch projection from flange to nose end, and an overall length of 6.6870 inches. Through-coolant capability is supported via both through-spindle and DIN flange delivery, keeping the cutting zone clear during heavy material removal. The holder is balanced to 10,000 RPM and achieves a TIR of 0.0002 inches, making it suitable for precision face milling and shell mill applications. A licensed machinist or CNC setup technician is the primary installer for this tooling component.\u003c\/p\u003e\u003cp\u003eThis holder is intended for use on CNC vertical and horizontal machining centers equipped with a CAT40 spindle interface. It accommodates shell mill cutting diameters ranging from 3 inches to 3.5 inches. The dual contact taper shank engages both the taper and the spindle face simultaneously, improving rigidity and reducing runout compared to standard single-contact CAT40 holders. The through-coolant design with DIN flange support makes it well suited for applications where directed coolant flow to the cutter is required.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eCAT40 dual contact taper shank for improved spindle rigidity and reduced runout\u003c\/li\u003e\n\u003cli\u003e1.25 inch pilot diameter with 4 inch flange-to-nose projection\u003c\/li\u003e\n\u003cli\u003eThrough-coolant compatible via through-spindle and DIN flange coolant delivery\u003c\/li\u003e\n\u003cli\u003eBalanced to 10,000 RPM for stable high-speed milling\u003c\/li\u003e\n\u003cli\u003eTIR of 0.0002 inches for precision tool positioning\u003c\/li\u003e\n\u003cli\u003eLock screw thread size 5\/8-18 for secure shell mill retention\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use with shell mills in the 3 inch to 3.5 inch cutting diameter range on CAT40 dual contact spindle machines. No additional specific model compatibility data was provided in the product input.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThis toolholder is installed by a qualified CNC machinist or toolroom technician. Always power down and lock out the machining center spindle before seating or removing the holder. Verify the spindle taper and holder taper are clean and free of chips or coolant deposits before installation. Confirm lock screw engagement torque meets the machine tool builder's specifications prior to operation.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\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: Dual Contact Taper\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePilot Diameter\u003c\/strong\u003e: 1.25 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 6.6870 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProjection Flange to Nose End\u003c\/strong\u003e: 4 inches (101.60 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNose Diameter\u003c\/strong\u003e: 2.8800 inches (73.15 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShell Mill Cutting Diameter Range\u003c\/strong\u003e: 3 inches to 3.5 inches\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 RPM\u003c\/strong\u003e: 10,000 RPM\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\u003eLock Screw Thread Size\u003c\/strong\u003e: 5\/8-18\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 7.6 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 27112800\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: 771202\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ACCUPRO","offers":[{"title":"Default Title","offer_id":51958172549426,"sku":"771202","price":309.62,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/443677282df6eaf15531d341bb10633b.jpg?v=1789944921","url":"https:\/\/voomisupply.com\/products\/accupro-771202-cat40-shell-mill-holder-1-25-in-pilot","provider":"Voomi Supply","version":"1.0","type":"link"}