{"product_id":"parlec-c50-25sm4-shell-mill-holder-cat50-2-5-in-pilot","title":"Parlec C50-25SM4 Shell Mill Holder CAT50 2.5 in Pilot","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe PARLEC C50-25SM4 is a CAT50 taper shank shell mill holder designed for use on CNC machining centers requiring secure, high-precision face milling setups. It accepts shell mills with a 2.5-inch pilot diameter and accommodates cutting diameters ranging from 6 to 8 inches. With a total indicated runout (TIR) of 0.0002 inches and a balance rating of 30,000 RPM, this holder delivers the rigidity and accuracy that production machinists and toolroom technicians expect from a premium-grade toolholder. The 4-inch projection from flange to nose end provides adequate clearance for most horizontal and vertical machining applications.\u003c\/p\u003e\n\u003cp\u003eThis holder is suited for heavy face milling operations on vertical and horizontal machining centers equipped with CAT50 spindle tapers. It is commonly used in production shops running large-diameter shell mills on steel, cast iron, aluminum, and other structural materials. The included lock screw thread size of 1-14 accepts the corresponding PARLEC 25LS lock screw. No through-coolant feature is present, so coolant delivery must be handled externally or through the machine spindle face if applicable.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eCAT50 taper shank for secure fit in standard CAT50 spindle interfaces\u003c\/li\u003e\n  \u003cli\u003e2.5-inch pilot diameter supports shell mills in the 6 to 8-inch cutting diameter range\u003c\/li\u003e\n  \u003cli\u003eTIR of 0.0002 inches for high-precision face milling applications\u003c\/li\u003e\n  \u003cli\u003eBalanced to 30,000 RPM for compatibility with high-speed spindle operations\u003c\/li\u003e\n  \u003cli\u003e4-inch projection from flange to nose end provides workpiece clearance in most setups\u003c\/li\u003e\n  \u003cli\u003eLock screw thread size 1-14 compatible with 25LS lock screw\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style toolholder for CNC machining centers with CAT50 spindle tapers, compatible with shell mills having a 2.5-inch pilot bore and cutting diameters from 6 to 8 inches.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a qualified machinist or tooling technician. Ensure the machine spindle is fully stopped and locked out before mounting or removing this holder. Clean both the CAT50 taper and spindle bore thoroughly before seating to prevent runout from contamination. Verify lock screw engagement and holder draw bar torque according to the machine tool manufacturer's specifications before initiating 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: CAT50 Taper\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePilot Diameter\u003c\/strong\u003e: 2.5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNose Diameter\u003c\/strong\u003e: 4.88 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProjection Flange to Nose End\u003c\/strong\u003e: 4 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShell Mill Cutting Diameter Range\u003c\/strong\u003e: 6 to 8 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: 30,000 RPM\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLock Screw Thread Size\u003c\/strong\u003e: 1-14\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLock Screw\u003c\/strong\u003e: 25LS\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: 23 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: PARLEC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: C50-25SM4\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PARLEC","offers":[{"title":"Default Title","offer_id":51971193471282,"sku":"C50-25SM4","price":526.43,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/f6744d9eaed6960ddc2169bdfae4fa52.jpg?v=1789954456","url":"https:\/\/voomisupply.com\/products\/parlec-c50-25sm4-shell-mill-holder-cat50-2-5-in-pilot","provider":"Voomi Supply","version":"1.0","type":"link"}