{"product_id":"osborn-0003356700-knotted-cup-brush-2-3-4-in-stainless-steel","title":"Osborn 0003356700 Knotted Cup Brush 2-3\/4 in Stainless Steel","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe OSBORN 0003356700 is a knotted cup brush designed for aggressive surface preparation on metal and weld seams. The knotted stainless steel fill provides greater impact force per wire pass compared to crimped fill, making it well suited for removing mill scale, weld spatter, rust, and heavy coatings. The brush measures 2-3\/4 inches in diameter with a 0.014-inch wire diameter and a 7\/8-inch trim length. A threaded 5\/8-11 arbor hole mounts directly to standard angle grinders and die grinders. Maximum rated speed is 14,000 RPM. Weight is 3.75 pounds.\u003c\/p\u003e\n\u003cp\u003eThis cup brush is used in industrial maintenance, fabrication shops, and field welding applications where a consistent, aggressive scratch pattern is required before painting, coating, or inspection. The single-row knotted construction concentrates wire contact at the work surface, improving cut rate on heavy deposits. Stainless steel fill is preferred where carbon contamination of the base material is not acceptable, such as stainless steel or aluminum substrate work. Licensed HVAC, plumbing, and pipefitting tradespeople frequently use brushes of this type when preparing pipe ends, weld joints, or mechanical connections for further treatment.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eKnotted stainless steel wire for aggressive material removal and reduced carbon contamination risk\u003c\/li\u003e\n  \u003cli\u003e2-3\/4-inch brush diameter with single-row construction for concentrated contact pressure\u003c\/li\u003e\n  \u003cli\u003e0.014-inch wire diameter balances cutting aggressiveness with wire durability\u003c\/li\u003e\n  \u003cli\u003e7\/8-inch trim length provides consistent wire reach and flex characteristics\u003c\/li\u003e\n  \u003cli\u003eThreaded 5\/8-11 arbor hole fits standard angle grinder and die grinder spindles\u003c\/li\u003e\n  \u003cli\u003e14,000 RPM maximum rated speed compatible with most 4-inch to 5-inch angle grinders\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned to fit angle grinders and die grinders equipped with a standard 5\/8-11 threaded spindle. Verify the tool RPM rating meets or exceeds the 14,000 RPM maximum before mounting.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eAlways power down and unplug or lockout-tagout the grinder before mounting or removing the brush. Thread the 5\/8-11 arbor securely onto the spindle and confirm the rotation direction matches the arrow marked on the brush before starting. Operators should wear appropriate face shield, gloves, and hearing protection when using knotted wire cup brushes. Do not exceed the 14,000 RPM maximum rated speed under any operating condition.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrush Diameter\u003c\/strong\u003e: 2-3\/4 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWire Diameter\u003c\/strong\u003e: 0.014 inches\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\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFill Material\u003c\/strong\u003e: Stainless 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\u003eWeight\u003c\/strong\u003e: 3.75 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: OSBORN\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 0003356700\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSBORN","offers":[{"title":"Default Title","offer_id":51755832803634,"sku":"0003356700","price":65.35,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/2024064a2da3a6f707b8042938ab6819.jpg?v=1788960237","url":"https:\/\/voomisupply.com\/products\/osborn-0003356700-knotted-cup-brush-2-3-4-in-stainless-steel","provider":"Voomi Supply","version":"1.0","type":"link"}