{"product_id":"norton-4-1-2-in-d-x-7-8-in-zirconia-aluminum-oxide-flap-disc-40-grit","title":"Norton 4-1\/2 in. D X 7\/8 in. Zirconia Aluminum Oxide Flap Disc 40 Grit","description":"\u003cdiv\u003e\n\u003cp\u003eThe Norton 4-1\/2 in. D x 7\/8 in. Zirconia Aluminum Oxide Flap Disc 40 Grit is built for serious metal work. This single-disc, extra-coarse flap disc combines rugged zirconia aluminum oxide with a coarse 40 grit to deliver fast stock removal, smooth blending, and long-lasting performance on tough metals. With a 4-1\/2\" diameter and a 7\/8\" arbor, it fits standard angle grinders for quick setups in busy shops and garages.\u003c\/p\u003e \u003cp\u003eWhy it stands out:\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eAggressive stock removal\u003c\/strong\u003e thanks to the 40-grit zirconia aluminum oxide blend, designed to eat through welds, rust, and rough surfaces without bogging down.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDurable, self-sharpening action\u003c\/strong\u003e from ceramic-infused abrasive that stays cooler and lasts longer under heavy grinding compared with traditional aluminum oxide discs.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHigh-performance for metal finishing\u003c\/strong\u003e ideal for prep work, deburring, edge blending, and shaping on steel, stainless steel, and other hard metals.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eReliable fit\u003c\/strong\u003e with a standard 7\/8\" arbor on a 4-1\/2\" disc, ensuring compatibility with most common angle grinders and quick changeovers.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMaximum efficiency\u003c\/strong\u003e rated up to 13300 RPM, enabling rapid material removal while maintaining control and reducing heat buildup.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOne-disc practicality\u003c\/strong\u003e sold as a single, dependable disc ready for immediate use in demanding fabrication and repair tasks.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003ePractical use cases\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eHeavy weld grinding and blending on steel frames, exhaust components, and machinery housings.\u003c\/li\u003e \u003cli\u003eRust removal and surface contouring on industrial metal parts prior to coating or welding.\u003c\/li\u003e \u003cli\u003eRim and edge deburring on fabricated metal assemblies where a smoother finish is needed before further processing.\u003c\/li\u003e \u003cli\u003eQuick surface prep for repainting or coating projects where consistent material removal is essential.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWho benefits most\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eProfessional metal fabricators and welding shops needing reliable, aggressive discs for daily stock removal.\u003c\/li\u003e \u003cli\u003eAutomotive repair and maintenance technicians working on chassis, exhaust, or frame components.\u003c\/li\u003e \u003cli\u003eDIY enthusiasts tackling thick metal projects or heavy rust and weld cleanup at home or in a workshop.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eTips for best results\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eUse with a compatible angle grinder and a steady, light-to-moderate pressure to avoid gouging.\u003c\/li\u003e \u003cli\u003eKeep the disc moving in a smooth, overlapping pattern to achieve an even finish and prevent heat buildup.\u003c\/li\u003e \u003cli\u003ePair with an appropriate backing pad if your grinder setup supports it to maximize contact and stabilize cutting action.\u003c\/li\u003e \u003cli\u003eAlways wear eye, face, and hand protection; ensure proper ventilation when grinding metal.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003cbr\u003e\nDiameter: 4-1\/2 in.\u003cbr\u003e\nArbor: 7\/8 in.\u003cbr\u003e\nGrit: 40 (Extra Coarse)\u003cbr\u003e\nMaterial: Zirconia Aluminum Oxide\u003cbr\u003e\nMaximum Speed: 13300 RPM\u003cbr\u003e\nPackage: 1 disc\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Norton","offers":[{"title":"Default Title","offer_id":52197901959442,"sku":"2851111","price":6.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0928\/1024\/8466\/files\/2851111_A.eps_High.jpg?v=1776205184","url":"https:\/\/nationalhardwaregroup.com\/products\/norton-4-1-2-in-d-x-7-8-in-zirconia-aluminum-oxide-flap-disc-40-grit","provider":"National Hardware Group","version":"1.0","type":"link"}