{"product_id":"norton-66252849381-type-27-grinding-wheel-4-5in-20-grit","title":"Norton 66252849381 Type 27 Grinding Wheel 4.5in 20 Grit","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe NORTON 66252849381 is a Type 27 depressed-center grinding wheel designed for aggressive material removal on angle grinders and right-angle grinders. Built with aluminum oxide abrasive at a coarse 20 grit, it is bonded with a resinoid bond and reinforced for structural integrity under high-speed operation. The wheel measures 4.5 inches in diameter and 0.125 inches thick, with a 0.625-inch arbor hole. It carries a medium hardness rating (hardness code P) and is rated to a maximum of 13,580 RPM. The semi-friable grain structure allows the wheel to fracture and self-sharpen during use, maintaining cut rate on ferrous metals, welds, and castings.\u003c\/p\u003e\u003cp\u003eThis wheel is suited for fabrication shops, ironworkers, pipefitters, and maintenance trades that require a compact grinding wheel for weld grinding, surface preparation, and deburring. The 4.5-inch diameter fits standard 4.5-inch angle grinders commonly used in the field. The Type 27 depressed-center profile keeps the wheel hub clear of the workpiece, allowing flat or flush grinding at low angles. The coarse 20-grit designation makes this wheel appropriate for rapid stock removal rather than fine finishing work.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eType 27 depressed-center profile for flush and flat grinding applications\u003c\/li\u003e\n\u003cli\u003eAluminum oxide abrasive, semi-friable, self-sharpening during use\u003c\/li\u003e\n\u003cli\u003e20 grit coarse grade for aggressive stock removal\u003c\/li\u003e\n\u003cli\u003eResinoid bond with reinforced construction for high-speed durability\u003c\/li\u003e\n\u003cli\u003eMedium hardness (code P) for consistent performance on ferrous metals\u003c\/li\u003e\n\u003cli\u003eMaximum operating speed of 13,580 RPM\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a replacement-style Type 27 depressed-center wheel for 4.5-inch angle grinders with a 0.625-inch arbor. Confirm your grinder guard and spindle are rated for Type 27 wheels before installation.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and wheel changes must be performed by a qualified operator following ANSI B7.1 and grinder manufacturer guidelines. Disconnect and de-energize the grinder before mounting or removing a wheel. Inspect the wheel for cracks or chips before each use and perform a ring test; never use a damaged wheel. Do not exceed the maximum rated RPM of 13,580, and always use the appropriate guard for Type 27 wheels.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWheel Diameter\u003c\/strong\u003e: 4.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWheel Thickness\u003c\/strong\u003e: 0.125 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHole Size\u003c\/strong\u003e: 0.625 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWheel Type\u003c\/strong\u003e: Type 27\u003c\/li\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: 20\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade\u003c\/strong\u003e: Coarse\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHardness Rating\u003c\/strong\u003e: Medium\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHardness Code\u003c\/strong\u003e: P\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum RPM\u003c\/strong\u003e: 13,580\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBond Type\u003c\/strong\u003e: Resinoid\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReinforced\u003c\/strong\u003e: Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFriable\u003c\/strong\u003e: Semi-Friable\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnector Type\u003c\/strong\u003e: Arbor\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWheel Color\u003c\/strong\u003e: Black\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.34 pounds\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: 66252849381\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"NORTON","offers":[{"title":"Default Title","offer_id":51541932441906,"sku":"66252849381","price":24.18,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/2122193444132454c60538b92e137ec3.jpg?v=1785887937","url":"https:\/\/voomisupply.com\/products\/norton-66252849381-type-27-grinding-wheel-4-5in-20-grit","provider":"Voomi Supply","version":"1.0","type":"link"}