{"product_id":"norton-66252838835-knotted-cup-brush-3-in-carbon-steel","title":"Norton 66252838835 Knotted Cup Brush 3 in Carbon Steel","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe NORTON 66252838835 is a knotted carbon steel cup brush designed for aggressive surface preparation on metal and fabricated components. The 3-inch diameter brush uses 0.02-inch diameter knotted wire strands that concentrate force at contact points, making it well suited for weld cleanup, rust removal, scale removal, and paint stripping. Rated to 14,000 RPM maximum, this brush is intended for use with angle grinders and compatible threaded-arbor tools. It features a single-row wire configuration and a 7\/8-inch trim length. Licensed tradespeople and metal fabricators rely on this type of cup brush for heavy-duty surface conditioning ahead of coating or inspection.\u003c\/p\u003e\n\u003cp\u003eThis knotted cup brush is used in metal fabrication shops, structural steel erection, pipefitting, and maintenance welding environments. It is appropriate for residential and commercial applications where aggressive mechanical surface preparation is required before welding, painting, or coating. The threaded 5\/8-11 arbor makes it compatible with standard angle grinder spindles commonly found on job sites. It is not intended for use on aluminum, soft metals, or coated surfaces where wire contamination is a concern.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eKnotted wire construction delivers concentrated cutting action for heavy scale, rust, and weld spatter removal\u003c\/li\u003e\n  \u003cli\u003e3-inch brush diameter for efficient coverage in cup brush grinder applications\u003c\/li\u003e\n  \u003cli\u003e0.02-inch wire diameter carbon steel fill provides durability under sustained load\u003c\/li\u003e\n  \u003cli\u003e14,000 RPM maximum speed rating for use with standard angle grinders\u003c\/li\u003e\n  \u003cli\u003e5\/8-11 threaded arbor hole fits most common angle grinder spindles\u003c\/li\u003e\n  \u003cli\u003eSingle-row configuration with 7\/8-inch trim length for controlled wire deflection\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use with angle grinders equipped with a standard 5\/8-11 threaded spindle arbor. Verify tool RPM rating meets or exceeds 14,000 RPM before mounting.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a qualified tradesperson following grinder and accessory manufacturer guidelines. Always power down and disconnect the grinder from its power source before mounting or removing the brush. Confirm the grinder spindle speed does not exceed the 14,000 RPM maximum rating marked on this brush before operation. Wear appropriate personal protective equipment including face shield and gloves when operating wire cup brushes, in accordance with applicable ANSI and OSHA standards.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrush Diameter\u003c\/strong\u003e: 3 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWire Diameter\u003c\/strong\u003e: 0.02 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFill Material\u003c\/strong\u003e: Carbon Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrush Type\u003c\/strong\u003e: Knotted\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRow Count\u003c\/strong\u003e: Single Row\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eArbor Type\u003c\/strong\u003e: Threaded Arbor\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eArbor Hole Thread Size\u003c\/strong\u003e: 5\/8-11\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTrim Length\u003c\/strong\u003e: 7\/8 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum RPM\u003c\/strong\u003e: 14,000 RPM\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Dimensions\u003c\/strong\u003e: 4.25 inches L x 2 inches W x 6 inches H\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.65 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\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: 66252838835\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"NORTON","offers":[{"title":"Default Title","offer_id":51538744803634,"sku":"66252838835","price":69.25,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/790abe6e7cbdcd9726c126a938bc4c0f.jpg?v=1785826022","url":"https:\/\/voomisupply.com\/products\/norton-66252838835-knotted-cup-brush-3-in-carbon-steel","provider":"Voomi Supply","version":"1.0","type":"link"}