{"product_id":"value-collection-204-4056-er40-collet-7-8-inch","title":"Value Collection 204-4056 ER40 Collet 7\/8 Inch","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VALUE COLLECTION 204-4056 is an ER40 series collet machined to a 0.8748 inch (7\/8 inch) bore size with a total indicator runout (TIR) of 0.0005 inches. ER collets are precision workholding components used in CNC machining centers, manual mills, and lathes to grip cutting tools or round stock concentrically within a collet chuck. The tight TIR rating on this collet supports accurate material removal and consistent tool positioning during cutting operations. Machinists and tool-room technicians select ER40 collets when the application requires a mid-to-large bore capacity within the widely standardized ER collet system. The part weighs 0.44 pounds.\u003c\/p\u003e\n\u003cp\u003eThis collet is suited for use in ER40-compatible collet chucks mounted on vertical machining centers, horizontal mills, CNC lathes, and similar machine tool spindles. The 7\/8 inch bore accommodates standard shank tooling and round stock at that diameter. It is used in job shops, production facilities, and tool rooms wherever repeatable tool holding is required at the ER40 bore size. Installation and removal follow standard ER collet procedures using a torque wrench and the appropriate ER40 collet nut and chuck body.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eER40 collet series — fits any ER40-compatible chuck body\u003c\/li\u003e\n  \u003cli\u003e0.8748 inch (7\/8 inch) bore for standard shank tooling and round stock\u003c\/li\u003e\n  \u003cli\u003e0.0005 inch TIR for precise, concentric tool holding\u003c\/li\u003e\n  \u003cli\u003eLightweight at 0.44 pounds for easy handling and quick changeover\u003c\/li\u003e\n  \u003cli\u003eSingle-piece collet construction standard to the ER system\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use in ER40-compatible collet chucks across standard CNC and manual machine tool platforms that accept the ER40 collet series.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eER collets are installed and removed by qualified machinists or tool-room technicians. Before changing collets, power down the machine spindle and confirm the spindle has come to a full stop. Seat the collet fully into the collet nut before threading the nut onto the chuck body, and use a calibrated torque wrench with the correct ER40 collet nut spanner to achieve proper clamping force. Do not use an undersized or oversized collet to grip a tool shank — always match the collet bore to the actual tool shank diameter.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCollet Series\u003c\/strong\u003e: ER40\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCollet Bore Size (Decimal Inch)\u003c\/strong\u003e: 0.8748 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCollet Bore Size (Fractional Inch)\u003c\/strong\u003e: 7\/8 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: 0.44 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: 204-4056\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51698887852338,"sku":"204-4056","price":27.38,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/67e2000cc621b96892472df64793010f.jpg?v=1788369422","url":"https:\/\/voomisupply.com\/products\/value-collection-204-4056-er40-collet-7-8-inch","provider":"Voomi Supply","version":"1.0","type":"link"}