{"product_id":"norton-66623341107-flap-disc-4-1-2-in-36-grit-type-29","title":"Norton 66623341107 Flap Disc 4-1\/2 in 36 Grit Type 29","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe NORTON 66623341107 is a Type 29 zirconia alumina flap disc built for aggressive material removal on steel and similar metals. It measures 4-1\/2 inches in diameter with a 7\/8-inch arbor hole and runs at a maximum of 13,300 RPM. The disc carries a 36-grit coarse abrasive, making it well-suited for heavy stock removal, weld blending, and surface conditioning where fast cut rate matters. A fiberglass backing plate supports the flap arrangement and helps maintain disc shape under lateral grinding pressure. Part of the NORTON R860 series, this disc is intended for use with standard angle grinders in fabrication and maintenance applications.\u003c\/p\u003e\u003cp\u003eThis flap disc is used in metalworking environments where rapid removal of weld spatter, mill scale, or surface rust is required. The Type 29 conical design positions the abrasive flaps at an angle, which increases surface contact and improves cut rate compared to a flat Type 27 profile. Typical applications include structural steel fabrication, pipe weld prep, and general metal finishing in both shop and field settings. The blue zirconia alumina grain is self-sharpening, which helps maintain a consistent cut rate over the disc life.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eType 29 conical profile increases contact area for faster stock removal\u003c\/li\u003e\n\u003cli\u003e36-grit zirconia alumina grain — self-sharpening, suited for coarse metal work\u003c\/li\u003e\n\u003cli\u003eFiberglass backing plate provides structural support under side-load grinding\u003c\/li\u003e\n\u003cli\u003eRated to 13,300 RPM for use with standard 4-1\/2-inch angle grinders\u003c\/li\u003e\n\u003cli\u003e7\/8-inch arbor hole fits most common angle grinder spindles\u003c\/li\u003e\n\u003cli\u003ePart of the R860 series, designed for steel and ferrous metal applications\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use with 4-1\/2-inch angle grinders equipped with a 7\/8-inch arbor. Intended for use on steels and ferrous metals per manufacturer specification.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and disc changes should be performed by a qualified operator following the grinder manufacturer's instructions and ANSI B7.1 safety standards. Always confirm the grinder's free-speed RPM does not exceed the disc's 13,300 RPM rating before mounting. Inspect the disc for cracks or damage before each use and discard any disc that shows signs of delamination or flap separation. Wear appropriate PPE including face shield and gloves when operating angle grinders.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDisc Diameter\u003c\/strong\u003e: 4-1\/2 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCenter Hole Size\u003c\/strong\u003e: 7\/8 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlap Disc Type\u003c\/strong\u003e: Type 29\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrit\u003c\/strong\u003e: 36\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade\u003c\/strong\u003e: Very Coarse\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAbrasive Material\u003c\/strong\u003e: Zirconia Alumina\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAbrasive Type\u003c\/strong\u003e: Coated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBacking Material\u003c\/strong\u003e: Fiberglass\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum RPM\u003c\/strong\u003e: 13,300\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Application\u003c\/strong\u003e: Steels\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: R860\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDisc Color\u003c\/strong\u003e: Blue\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAttachment Type\u003c\/strong\u003e: Arbor Hole\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Dimensions\u003c\/strong\u003e: 4.75 x 4.75 x 7.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.085 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: 66623341107\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"NORTON","offers":[{"title":"Default Title","offer_id":51538343887154,"sku":"66623341107","price":157.08,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/0f14590c235857af6871479b56ef1789.jpg?v=1785823423","url":"https:\/\/voomisupply.com\/products\/norton-66623341107-flap-disc-4-1-2-in-36-grit-type-29","provider":"Voomi Supply","version":"1.0","type":"link"}