{"product_id":"kennametal-1021496-er20-collet-chuck-straight-shank","title":"Kennametal 1021496 ER20 Collet Chuck Straight Shank","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe KENNAMETAL 1021496 is an ER20 collet chuck with a straight shank, designed for precision workholding in CNC machining centers and milling applications. It accepts ER20 collets with a capacity range of 0.51 mm to 12.70 mm (0.020 to 0.500 inches), making it suitable for a wide range of cutting tool shank diameters. The chuck features through-coolant delivery via a through-spindle coolant path and holds a total indicator runout (TIR) of 0.0025 mm (0.0001 inches), supporting tight-tolerance machining operations. A 1-inch straight shank provides straightforward spindle mounting. Licensed machinists and CNC setup technicians are the primary installers of this toolholder.\u003c\/p\u003e\u003cp\u003eThis ER20 collet chuck is suited for use in production and job-shop environments running CNC mills, machining centers, or drill-tap machines equipped with compatible straight-shank spindle interfaces. The 1.75-inch projection and 7-inch overall length position the cutting tool at a predictable gage length for programming and setup. The wrench-actuated collet nut allows secure tool clamping with standard ER collet wrenches. Through-spindle coolant capability supports flood or high-pressure coolant delivery directly to the cutting zone, extending tool life in ferrous and non-ferrous machining.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eER20 collet system accepts tool shanks from 0.51 mm to 12.70 mm\u003c\/li\u003e\n\u003cli\u003eTIR of 0.0025 mm (0.0001 inches) for precision runout performance\u003c\/li\u003e\n\u003cli\u003eThrough-spindle coolant path delivers coolant directly to the cutting edge\u003c\/li\u003e\n\u003cli\u003e1-inch straight shank with 5.25-inch shank length for stable spindle engagement\u003c\/li\u003e\n\u003cli\u003eBalanced to 8,000 RPM for use in standard spindle speed ranges\u003c\/li\u003e\n\u003cli\u003eWrench-actuated ER collet nut for positive tool clamping and release\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use with ER20 series collets in CNC machining centers and milling machines equipped with a 1-inch straight-shank spindle interface. Accepts standard ER20 collets within the rated capacity range.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and tool changes should be performed by a qualified machinist or CNC setup technician with the spindle fully stopped and the machine in a locked-out, de-energized state. Use the correct ER20 collet wrench and spanner to tighten the collet nut to the toolholder manufacturer's recommended procedure — do not use impact tools on the collet nut. Verify TIR with a dial indicator after mounting before beginning production cuts. Confirm through-coolant fittings and spindle coolant ports are clear and properly connected before enabling coolant flow.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCollet System\u003c\/strong\u003e: ER\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCollet Series\u003c\/strong\u003e: ER20\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 1.0000 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Length\u003c\/strong\u003e: 5.2500 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimum Collet Capacity\u003c\/strong\u003e: 0.51 mm (0.0200 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Collet Capacity\u003c\/strong\u003e: 12.70 mm (0.5000 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: 7.0 inches (177.8 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTIR\u003c\/strong\u003e: 0.0025 mm (0.0001 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThrough Coolant\u003c\/strong\u003e: Yes, through-spindle\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCollet Nut Diameter\u003c\/strong\u003e: 34.01 mm (1.3390 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHex Diameter\u003c\/strong\u003e: 1.3400 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eActuator Type\u003c\/strong\u003e: Wrench\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBalanced To\u003c\/strong\u003e: 8,000 RPM\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 1.2787 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: 1021496\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KENNAMETAL","offers":[{"title":"Default Title","offer_id":51730204688690,"sku":"1021496","price":295.78,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/1309706eb47a30b4cd7f84da543e13bb.jpg?v=1788713301","url":"https:\/\/voomisupply.com\/products\/kennametal-1021496-er20-collet-chuck-straight-shank","provider":"Voomi Supply","version":"1.0","type":"link"}