{"product_id":"irwin-marathon-7-1-4-in-d-x-5-8-in-steel-circular-saw-blade-4-teeth","title":"Irwin Marathon 7-1\/4 in. D X 5\/8 in. Steel Circular Saw Blade 4 teeth","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Irwin Marathon 7-1\/4 in. Steel Circular Saw Blade, a purpose-built tool for fiber cement projects where speed and dependability matter. With a compact 4-tooth design, this blade slices through hard boards fast, delivering clean starts and steady progress for finish-ready cuts.\u003c\/p\u003e \u003cp\u003eDesigned to fit standard 5\/8\" arbors, this blade is compatible with most full-size circular saws. Its 7-1\/4\" diameter provides a broad cutting surface for longer runs, while the flat grind and 10° hook angle optimize bite and control, reducing wander on tough fiber cement material. The kerf of.071\" strikes a balance between aggressive removal and smooth feed, helping you maintain line accuracy even when you're cutting thicker boards.\u003c\/p\u003e \u003ch3\u003eSpecifications at a glance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiameter:\u003c\/strong\u003e 7-1\/4\" (184 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eArbor size:\u003c\/strong\u003e 5\/8\" (16 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of teeth:\u003c\/strong\u003e 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKerf:\u003c\/strong\u003e.071\" (1.8 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrind:\u003c\/strong\u003e Flat\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHook angle:\u003c\/strong\u003e 10°\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum speed:\u003c\/strong\u003e 7300 RPM\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUsage:\u003c\/strong\u003e Fiber cement\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackaging:\u003c\/strong\u003e Carded, 1 blade per package\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Irwin Marathon\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhat makes this blade stand out\u003c\/h3\u003e\n\u003cp\u003eWhy choose a steel, 4-tooth blade for fiber cement? The focused tooth count paired with a flat grind delivers rapid material removal for rough-cut tasks, making it ideal for dimensioning fiber cement boards and trimming long runs where speed is essential. The 5\/8\" arbor keeps it compatible with a wide range of saws, so you can rely on a straightforward swap without changing your setup. With Irwin Marathon’s legacy of durability, this blade is built to stand up to repeated cuts in demanding workshop conditions.\u003c\/p\u003e \u003ch3\u003eIdeal uses and practical tips\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eRough-cutting fiber cement boards where you want fast throughput without sacrificing safe material handling.\u003c\/li\u003e\n\u003cli\u003eCutting siding or backing boards in renovation projects where precision is less critical on the initial pass.\u003c\/li\u003e\n\u003cli\u003eAlways verify your saw’s RPM rating supports up to 7300 RPM before use.\u003c\/li\u003e\n\u003cli\u003eKeep the blade cool and clear of dust to extend life; a steady feed rate reduces chatter and keeps edges square.\u003c\/li\u003e\n\u003cli\u003eExplore using a straightedge or guide for long cuts to maintain a clean line on fiber cement.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eFor professional results on fiber cement installations, the Irwin Marathon 7-1\/4\" steel blade delivers speed, reliability, and straightforward service. Packaged in a carded format and ready to install, it’s a practical choice for tradespeople and serious DIYers tackling heavy-duty cutting tasks.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Irwin","offers":[{"title":"Default Title","offer_id":52181677015314,"sku":"2635860","price":79.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0928\/1024\/8466\/files\/2635860_A.eps_High.jpg?v=1775679212","url":"https:\/\/nationalhardwaregroup.com\/products\/irwin-marathon-7-1-4-in-d-x-5-8-in-steel-circular-saw-blade-4-teeth","provider":"National Hardware Group","version":"1.0","type":"link"}