{"product_id":"kennametal-1025921-cat40-end-mill-holder-3-16-inch-through-coolant","title":"Kennametal 1025921 CAT40 End Mill Holder 3\/16 Inch Through Coolant","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe KENNAMETAL 1025921 is a CAT40 taper shank end mill holder designed for CNC machining centers requiring precise tool retention and internal coolant delivery. The holder accepts a 3\/16 inch bore and features a through-coolant design with coolant delivered directly through the spindle to the cutting tool. With an overall length of 5.187 inches, a projection of 2.5 inches, and a nose diameter of 11\/16 inches, this holder is built for applications where reach and rigidity both matter. Balanced to 12,000 RPM, it is suited for high-speed machining operations. A licensed machinist or CNC setup technician is the typical installer.\u003c\/p\u003e\u003cp\u003eThis end mill holder is used in CNC vertical and horizontal machining centers equipped with a CAT40 spindle interface. It is well suited for production environments running through-spindle coolant systems where tool life and chip evacuation depend on consistent coolant flow directly at the cut zone. The 2.5 inch projection provides clearance for medium-depth workpiece features without sacrificing rigidity. The 5\/8-11 drawbar thread is standard for CAT40 tooling systems.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eCAT40 taper shank for direct mounting in CAT40-spindle machining centers\u003c\/li\u003e\n\u003cli\u003e3\/16 inch bore diameter for small-diameter end mill retention\u003c\/li\u003e\n\u003cli\u003eThrough-coolant design with through-spindle coolant delivery to the cutting tool\u003c\/li\u003e\n\u003cli\u003eBalanced to 12,000 RPM for high-speed machining applications\u003c\/li\u003e\n\u003cli\u003e2.5 inch projection with 11\/16 inch nose diameter for reach into workpiece features\u003c\/li\u003e\n\u003cli\u003e5\/8-11 drawbar thread, standard for CAT40 tooling\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or production tooling option for CAT40-spindle CNC machining centers equipped with through-spindle coolant and a 5\/8-11 drawbar.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and tool changes must be performed with the machine spindle fully stopped and locked out per facility lockout\/tagout procedures. Use a proper CAT40 tool-tightening fixture and drawbar wrench to achieve secure clamping — never hand-tighten a drawbar. Verify coolant passages are clear before mounting and confirm the end mill shank is seated to the full clamping depth of 4.01 inches for proper retention. A qualified machinist or CNC toolroom technician should handle setup.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: CAT40 Taper\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHole Diameter\u003c\/strong\u003e: 3\/16 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNose Diameter\u003c\/strong\u003e: 11\/16 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProjection\u003c\/strong\u003e: 2.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 5.187 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClamping Depth\u003c\/strong\u003e: 4.01 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\u003c\/strong\u003e: 12,000 RPM\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 2.464 pounds\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: 1025921\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KENNAMETAL","offers":[{"title":"Default Title","offer_id":51738023985458,"sku":"1025921","price":221.12,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/dfb4aa87aebc4f12ef27a705752aaaf5_bc0309cf-68c0-404a-953c-533700f55947.jpg?v=1788795707","url":"https:\/\/voomisupply.com\/products\/kennametal-1025921-cat40-end-mill-holder-3-16-inch-through-coolant","provider":"Voomi Supply","version":"1.0","type":"link"}