{"product_id":"brush-research-mfg-bnh1220-knotted-wire-end-brush","title":"Brush Research Mfg. BNH1220 Knotted Wire End Brush","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe BRUSH RESEARCH MFG. BNH1220 is a knotted wire end brush constructed with carbon steel fill material and a steel shank. It is designed for aggressive surface preparation, deburring, cleaning, and weld-scale removal on metal workpieces. The brush operates at a maximum rated speed of 20,000 RPM, making it suitable for use with high-speed die grinders, rotary tools, and similar power equipment. The knotted wire configuration delivers concentrated, high-impact abrasive action compared to crimped wire alternatives. A 3\/4-inch shank is included and integrated into the brush body for direct chuck mounting. Metalworkers, fabricators, maintenance technicians, and industrial tradespeople are the primary users of this tool.\u003c\/p\u003e\n\u003cp\u003eThis end brush is used in metalworking, fabrication, and industrial maintenance applications where surface conditioning or material removal is required on metal parts, welds, castings, and pipe ends. Its hollow center design concentrates wire contact at the brush perimeter, improving reach into recesses and bore openings. At 1.75 inches in width, it is sized for spot work and detail cleaning rather than broad surface coverage. It is a single-piece, per-unit item suitable for one-off replacement or stocking in tool cribs and field service kits.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eKnotted carbon steel wire fill for aggressive deburring and surface cleaning\u003c\/li\u003e\n  \u003cli\u003eMaximum operating speed of 20,000 RPM for use with high-speed rotary tools\u003c\/li\u003e\n  \u003cli\u003eIntegrated 3\/4-inch steel shank included for direct chuck mounting\u003c\/li\u003e\n  \u003cli\u003eHollow center construction concentrates wire contact at brush perimeter\u003c\/li\u003e\n  \u003cli\u003eNon-piloted, non-bridled, non-encapsulated, and non-flared configuration\u003c\/li\u003e\n  \u003cli\u003eWire diameter in the 0.0101 to 0.0200 inch range for medium-duty wire aggressiveness\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use with die grinders, rotary tools, and power equipment fitted with a chuck or collet accepting a 3\/4-inch shank. Verify that the tool's rated operating speed meets or exceeds the brush's 20,000 RPM maximum before mounting.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a qualified operator familiar with rotary abrasive tool safety. Always verify that the tool's no-load RPM does not exceed the 20,000 RPM maximum rating of the brush before use. Ensure the shank is fully seated and the chuck or collet is properly tightened before operating. Wear appropriate PPE including eye protection and gloves, and keep bystanders clear of the operating plane of the brush.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum RPM\u003c\/strong\u003e: 20,000\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFill Material\u003c\/strong\u003e: Carbon Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWire Type\u003c\/strong\u003e: Knotted\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWire Diameter Range\u003c\/strong\u003e: 0.0101 to 0.0200 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth\u003c\/strong\u003e: 1.75 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength\u003c\/strong\u003e: 3 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeight\u003c\/strong\u003e: 1.5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Length\u003c\/strong\u003e: 3\/4 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Material\u003c\/strong\u003e: Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Included\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHollow Center\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.25 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: BRUSH RESEARCH MFG.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: BNH1220\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"BRUSH RESEARCH MFG","offers":[{"title":"Default Title","offer_id":67906254340402,"sku":"BNH1220","price":44.18,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/2b694d50e467e5f35df63a2d361659ec.jpg?v=1791166593","url":"https:\/\/voomisupply.com\/products\/brush-research-mfg-bnh1220-knotted-wire-end-brush","provider":"Voomi Supply","version":"1.0","type":"link"}