{"product_id":"r8-shank-arbor-1-1-2-18-tpi-fly-cutter-boring-head","title":"R8 Shank Arbor 1-1\/2\"-18 TPI Threaded · 7\/16\"-20 UNF Drawbar · Fly Cutter \u0026 Boring Head","description":"\u003cp\u003ePrecision R8 shank arbor with a 1-1\/2\"-18 TPI threaded nose and 7\/16\"-20 UNF drawbar, designed to securely mount 100 mm fly cutters and 50 mm boring heads on milling machines with R8 spindles. Engineered for stability, accuracy, and low runout in milling operations.\u003c\/p\u003e\n\u003cp\u003eKey Features\u003c\/p\u003e\n\u003cp\u003eShank type: R8 shank — compatible with standard R8 milling machine spindles\u003c\/p\u003e\n\u003cp\u003eThreaded nose: 1-1\/2\" × 18 TPI male thread\u003c\/p\u003e\n\u003cp\u003eDrawbar thread: 7\/16\"-20 UNF (standard R8 drawbar)\u003c\/p\u003e\n\u003cp\u003eTool compatibility:\u003c\/p\u003e\n\u003cp\u003e100 mm fly cutter with 1-1\/2\"-18 TPI thread\u003c\/p\u003e\n\u003cp\u003e50 mm boring head with 1-1\/2\"-18 TPI internal thread\u003c\/p\u003e\n\u003cp\u003eSecure mounting: Drawbar retention ensures stable, vibration-free operation\u003c\/p\u003e\n\u003cp\u003eHigh accuracy: Precision-ground shank for excellent concentricity and reduced runout\u003c\/p\u003e\n\u003cp\u003eMaterial: Heat-treated alloy steel for strength and durability\u003c\/p\u003e\n\u003cp\u003eSurface finish: Ground and black-oxide\/phosphate coated for corrosion resistance\u003c\/p\u003e\n\u003cp\u003eTechnical Specifications\u003c\/p\u003e\n\u003cp\u003eShank: R8\u003c\/p\u003e\n\u003cp\u003eNose thread: 1-1\/2\" × 18 TPI (male)\u003c\/p\u003e\n\u003cp\u003eDrawbar thread: 7\/16\"-20 UNF\u003c\/p\u003e\n\u003cp\u003eTypical runout: ≤ 0.03 mm\u003c\/p\u003e\n\u003cp\u003eRecommended use: Milling, facing, and boring operations\u003c\/p\u003e\n\u003cp\u003eMachine compatibility: Milling machines with R8 spindle\u003c\/p\u003e\n\u003cp\u003eCompatibility \u0026amp; Application\u003c\/p\u003e\n\u003cp\u003eThis R8 arbor is specifically designed to fit:\u003c\/p\u003e\n\u003cp\u003e100 mm fly cutters with 1-1\/2\"-18 TPI mounting thread\u003c\/p\u003e\n\u003cp\u003e50 mm boring heads using 1-1\/2\"-18 TPI internal thread\u003c\/p\u003e\n\u003cp\u003eThe 7\/16\"-20 UNF drawbar provides positive retention in R8 spindles, ensuring secure tool holding during heavy cutting and finishing operations.\u003c\/p\u003e","brand":"BLUEFOX TOOLS","offers":[{"title":"Default Title","offer_id":62375232143731,"sku":null,"price":49.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0961\/3626\/6099\/files\/WhatsAppImage2025-12-16at13.46.43.jpg?v=1765873068","url":"https:\/\/bluefoxtoolmart.com\/products\/r8-shank-arbor-1-1-2-18-tpi-fly-cutter-boring-head","provider":"bluefoxtools","version":"1.0","type":"link"}