{"product_id":"value-collection-204-2020-er20-er-collet-5-16-inch","title":"Value Collection 204-2020 ER20 Er Collet 5\/16 Inch","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VALUE COLLECTION 204-2020 is an ER20 series ER collet designed for use in CNC machining centers, milling machines, and compatible toolholding systems. This collet accepts a 0.3122 inch (5\/16 inch) shank diameter and holds a total indicator runout (TIR) of 0.0005 inches, making it suitable for applications that require consistent tool concentricity. ER collets are the industry standard for spring collet clamping systems, providing secure tool retention across a wide range of cutting tools including end mills, drills, and reamers. Machinists and toolroom technicians rely on this collet for repeatable, accurate tool setup.\u003c\/p\u003e\n\u003cp\u003eThis collet is appropriate for use in machine shop environments running ER20-compatible toolholding chucks on vertical or horizontal machining centers, lathes with live tooling, and manual milling machines. The ER20 series is a common collet standard found across a broad range of spindle applications in both production and job shop settings. It is well suited for light to medium duty cutting operations where tool runout control is a priority.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eER20 collet series for use with ER20-standard chucks and toolholders\u003c\/li\u003e\n  \u003cli\u003e0.3122 inch (5\/16 inch) collet bore diameter for direct shank tool clamping\u003c\/li\u003e\n  \u003cli\u003e0.0005 inch TIR for consistent tool concentricity\u003c\/li\u003e\n  \u003cli\u003eSpring collet design allows for quick tool changes and secure clamping\u003c\/li\u003e\n  \u003cli\u003eLightweight at 0.08 pounds for easy handling during setup\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or direct-fit collet for ER20-standard collet chucks and toolholding systems.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eER collets are installed and removed by qualified machinists or toolroom technicians using the appropriate ER20 collet chuck and nut wrench. Before changing collets, the machine spindle must be fully stopped and all power to the machine must be isolated per shop lockout\/tagout procedures. Inspect the collet bore and chuck taper for debris or damage before seating the collet. Do not exceed the collet's rated clamping range to avoid damage to the collet or inconsistent tool retention.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCollet Series\u003c\/strong\u003e: ER20\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCollet Size (Decimal Inch)\u003c\/strong\u003e: 0.3122 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCollet Size (Fractional Inch)\u003c\/strong\u003e: 5\/16 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTIR\u003c\/strong\u003e: 0.0005 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.08 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 27112800\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: VALUE COLLECTION\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 204-2020\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51692325372210,"sku":"204-2020","price":24.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/0d443504e3726dc8e235b8f0a77f23d5.jpg?v=1788296342","url":"https:\/\/voomisupply.com\/products\/value-collection-204-2020-er20-er-collet-5-16-inch","provider":"Voomi Supply","version":"1.0","type":"link"}