{"product_id":"kennametal-1026380-end-mill-holder-cat40-1-2-inch","title":"Kennametal 1026380 End Mill Holder CAT40 1\/2 Inch","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe KENNAMETAL 1026380 is a CAT40 taper shank end mill holder designed for use in CNC machining centers. It accepts a 1\/2 inch bore and delivers a 1.75 inch projection from the spindle face, making it well suited for standard-reach milling operations. The holder features through-coolant capability, routing cutting fluid directly to the tool tip for improved chip evacuation and extended tool life. A 5\/8-11 drawbar thread secures the holder in the spindle, and the unit is balanced to 12,000 RPM for stable high-speed operation. Machinists and tool crib technicians working in production or job shop environments install this holder as part of a modular CAT40 tooling system.\u003c\/p\u003e\u003cp\u003eThis end mill holder is intended for use on CNC vertical and horizontal machining centers equipped with a CAT40 spindle taper. The through-coolant design is particularly valuable in deep-pocket milling, slotting, and operations where flood coolant does not reach the cutting zone effectively. The 1-3\/4 inch nose diameter and 3.26 inch clamping depth provide solid tool engagement for end mills with 1\/2 inch shanks. This holder suits both roughing and finishing applications where concentricity and rigidity are required.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eCAT40 taper shank for compatibility with standard CAT40 spindle interfaces\u003c\/li\u003e\n\u003cli\u003e1\/2 inch bore accepts standard 1\/2 inch shank end mills\u003c\/li\u003e\n\u003cli\u003eThrough-coolant design routes fluid directly to the cutting edge\u003c\/li\u003e\n\u003cli\u003eBalanced to 12,000 RPM for stable high-speed machining\u003c\/li\u003e\n\u003cli\u003e5\/8-11 drawbar thread for secure spindle retention\u003c\/li\u003e\n\u003cli\u003e1.75 inch projection suitable for standard-reach milling setups\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style toolholder for CNC machining centers equipped with a CAT40 taper spindle interface accepting 1\/2 inch shank cutting tools.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by a machinist or tooling technician with the spindle in the tool-change position and the machine powered down or placed in a safe state per facility lockout\/tagout procedures. Clean the taper bore and spindle taper contact surfaces before seating the holder to ensure proper seating and runout performance. Torque the drawbar according to the machining center manufacturer specifications. Verify through-coolant passages are clear before use to prevent blockage at the tool tip.\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: Taper\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHole Diameter\u003c\/strong\u003e: 0.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNose Diameter\u003c\/strong\u003e: 1.75 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProjection\u003c\/strong\u003e: 1.75 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 4.437 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClamping Depth\u003c\/strong\u003e: 3.26 inches\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\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\u003eBalanced To RPM\u003c\/strong\u003e: 12,000 RPM\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: KENNAMETAL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 1026380\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KENNAMETAL","offers":[{"title":"Default Title","offer_id":51753541697842,"sku":"1026380","price":222.32,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/dfb4aa87aebc4f12ef27a705752aaaf5_d0e07088-854f-4080-b386-ed76d62bc6a5.jpg?v=1788937990","url":"https:\/\/voomisupply.com\/products\/kennametal-1026380-end-mill-holder-cat40-1-2-inch","provider":"Voomi Supply","version":"1.0","type":"link"}