{"product_id":"value-collection-231-4807-r8-collet-7mm-steel","title":"Value Collection 231-4807 R8 Collet 7mm Steel","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe VALUE COLLECTION 231-4807 is a 7mm R8 collet machined from steel for use in milling machines equipped with an R8 spindle taper. It accepts tooling with a 7mm shank diameter and uses a 7\/16-20 drawbar thread to secure the collet in the spindle. The collet holds a Total Indicator Runout (TIR) of 0.0007 inches, providing the concentricity needed for precise milling operations. This collet is installed and serviced by machinists and tool room technicians working with Bridgeport-style and compatible vertical knee mills.\u003c\/p\u003e\u003cp\u003eThis collet is suited for manual vertical milling machines with R8 spindle tapers in job shop, maintenance, and light production environments. It is used to hold end mills, drill bits, and other 7mm shank tooling directly in the spindle without an adapter. The 7\/16-20 drawbar thread is the standard for R8 tooling and mates with the drawbar supplied on most R8-spindle machines.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e7mm bore diameter accepts standard 7mm shank tooling\u003c\/li\u003e\n\u003cli\u003eR8 taper profile fits standard R8 spindle machines\u003c\/li\u003e\n\u003cli\u003e0.0007 inch TIR for consistent concentricity during cutting operations\u003c\/li\u003e\n\u003cli\u003e7\/16-20 drawbar thread matches standard R8 machine drawbars\u003c\/li\u003e\n\u003cli\u003eSteel construction for durability under repeated clamping cycles\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or supplemental collet for vertical milling machines with an R8 spindle taper and a 7\/16-20 drawbar thread.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by a machinist or qualified tool room technician. Before installing or removing the collet, power down the machine and bring the spindle to a full stop. Insert the collet into the spindle taper and thread the drawbar by hand before tightening to secure the collet. Never use a collet that shows visible damage, out-of-round wear, or corrosion on the taper surface, as this will increase runout and compromise cut quality.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCollet Type\u003c\/strong\u003e: R8\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBore Diameter\u003c\/strong\u003e: 7mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrawbar Thread\u003c\/strong\u003e: 7\/16-20\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTotal Indicator Runout (TIR)\u003c\/strong\u003e: 0.0007 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\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: 231-4807\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51700797047090,"sku":"231-4807","price":26.74,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/418254dc38f7946c15521fdd9e294713.jpg?v=1788395239","url":"https:\/\/voomisupply.com\/products\/value-collection-231-4807-r8-collet-7mm-steel","provider":"Voomi Supply","version":"1.0","type":"link"}