{"product_id":"norton-66243529947-internal-grinding-wheel-60-grit","title":"Norton 66243529947 Internal Grinding Wheel 60 Grit","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe NORTON 66243529947 is a Type 1 internal grinding wheel designed for precision bore and internal diameter grinding operations. Built with aluminum oxide abrasive in a medium grade, 60-grit specification, it delivers consistent stock removal and surface finish on ferrous metals and similar materials. The vitrified bond holds abrasive grains firmly during aggressive cuts while still allowing controlled breakdown to expose fresh cutting edges. At 4 inches in diameter, 0.5 inches thick, and with a 0.5-inch hole, this wheel fits a range of internal grinding spindles used in production and tool-room environments. The wheel is rated to a maximum of 8,120 RPM. Installation and operation require an experienced machinist or grinding specialist.\u003c\/p\u003e\u003cp\u003eThis wheel is suited for internal grinding applications in manufacturing, tool-room, and maintenance machining environments. It is used on internal grinding machines to finish bores, bushings, bearing seats, and similar internal features on steel and cast iron workpieces. The medium grade and 60-grit combination make it appropriate for general-purpose stock removal where moderate surface finish is required. The vitrified bond performs well under coolant and at the moderate speeds typical of smaller-diameter internal grinding spindles.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e60-grit aluminum oxide abrasive for medium stock removal on ferrous workpieces\u003c\/li\u003e\n\u003cli\u003eMedium grade, K hardness rating for controlled abrasive breakdown during internal grinding\u003c\/li\u003e\n\u003cli\u003eVitrified bond provides rigidity and compatibility with water-based coolants\u003c\/li\u003e\n\u003cli\u003eSemi-friable abrasive structure supports consistent cutting action and wheel life\u003c\/li\u003e\n\u003cli\u003eType 1 straight wheel profile fits standard internal grinding spindle arbors\u003c\/li\u003e\n\u003cli\u003eMaximum operating speed of 8,120 RPM — do not exceed this rating\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or standard consumable for internal grinding machines that accept Type 1 straight wheels with a 4-inch diameter, 0.5-inch hole, and 0.5-inch face width.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation must be performed by a qualified machinist or grinding specialist following ANSI B7.1 safety standards for the use, care, and protection of abrasive wheels. Always ring-test the wheel before mounting and inspect for cracks or damage — never mount a damaged wheel. Power down and lock out the grinding machine before changing wheels. Verify that the machine spindle speed does not exceed the 8,120 RPM maximum rating marked on the wheel, and use appropriate flanges and blotters as required by the machine manufacturer.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAbrasive Material\u003c\/strong\u003e: Aluminum Oxide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrit\u003c\/strong\u003e: 60\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade\u003c\/strong\u003e: Medium\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHardness Rating\u003c\/strong\u003e: K (Medium)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBond Type\u003c\/strong\u003e: Vitrified\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFriability\u003c\/strong\u003e: Semi-Friable\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWheel Type\u003c\/strong\u003e: Type 1 (Straight)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWheel Color\u003c\/strong\u003e: White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiameter\u003c\/strong\u003e: 4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness\u003c\/strong\u003e: 0.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHole Diameter\u003c\/strong\u003e: 0.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum RPM\u003c\/strong\u003e: 8,120\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.5 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 23131503\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: NORTON\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 66243529947\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"NORTON","offers":[{"title":"Default Title","offer_id":51540124008754,"sku":"66243529947","price":37.56,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/284712488.webp?v=1785846312","url":"https:\/\/voomisupply.com\/products\/norton-66243529947-internal-grinding-wheel-60-grit","provider":"Voomi Supply","version":"1.0","type":"link"}