{"product_id":"value-collection-230-4440-5c-expanding-collet","title":"Value Collection 230-4440 5C Expanding Collet","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe VALUE COLLECTION 230-4440 is a 5C expanding collet machined from steel for use in 5C-compatible spindles and collet chucks on lathes and collet fixtures. Expanding collets grip the internal bore of a workpiece rather than clamping an outside diameter, making them the right tool when a part must be held from the inside for turning, grinding, or inspection operations. The collet features a 3-inch head diameter, a 2.5-inch head length, and a concentricity rating of 0.0020 inch TIR, providing consistent, repeatable workholding for precision machining work. Licensed machinists and toolroom technicians are the primary installers and users of this component.\u003c\/p\u003e\u003cp\u003eThis expanding collet is suited for machine shop and toolroom environments where internal gripping of bored or tubular workpieces is required. It accommodates a grip range from 0.75 inch minimum to 2.9375 inches maximum, covering a wide span of bore diameters in a single collet. The internal thread size is 1.041 inch-24 and the external thread size is 1.242 inch-20, allowing it to seat correctly in standard 5C collet closers and fixtures. It is appropriate for production turning, OD grinding setups, and inspection fixturing where a low runout, inside-diameter reference is needed.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eExpanding collet design grips workpiece internal bores rather than outside diameters\u003c\/li\u003e\n\u003cli\u003e0.0020 inch TIR concentricity for repeatable, low-runout workholding\u003c\/li\u003e\n\u003cli\u003eGrip range from 0.75 inch to 2.9375 inches covers a broad range of bore sizes\u003c\/li\u003e\n\u003cli\u003eSteel construction for durability under production machining conditions\u003c\/li\u003e\n\u003cli\u003eInternal thread 1.041 inch-24 and external thread 1.242 inch-20 for standard 5C system fit\u003c\/li\u003e\n\u003cli\u003e3-inch head diameter with 2.5-inch head length\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use in standard 5C collet spindles, collet chucks, and collet fixtures that accept expanding-style 5C collets with 1.242 inch-20 external thread engagement.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and adjustment of 5C expanding collets should be performed by a qualified machinist familiar with collet closer operation and workholding setup. Ensure the spindle or collet fixture is fully stopped and locked out before seating or removing the collet. Inspect collet threads and the mating closer threads for damage or contamination before installation, and clean mating surfaces. Do not exceed the stated maximum grip diameter, as overloading an expanding collet can cause it to crack or deform and can damage the workpiece or spindle.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCollet Type\u003c\/strong\u003e: Expanding\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHead Diameter\u003c\/strong\u003e: 3 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHead Length\u003c\/strong\u003e: 2.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConcentricity (TIR)\u003c\/strong\u003e: 0.0020 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimum Grip\u003c\/strong\u003e: 0.75 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Grip\u003c\/strong\u003e: 2.9375 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInternal Thread Size\u003c\/strong\u003e: 1.041 inch-24\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExternal Thread Size\u003c\/strong\u003e: 1.242 inch-20\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.05 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 27112800\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\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: 230-4440\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51691835523378,"sku":"230-4440","price":244.14,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/f9655e112e4eaa2a3781c92cbb36dce8.jpg?v=1788290297","url":"https:\/\/voomisupply.com\/products\/value-collection-230-4440-5c-expanding-collet","provider":"Voomi Supply","version":"1.0","type":"link"}