Irwin Marathon 10 in. Circular Saw Blade with 5/8 in. Arbor — 6 Teeth is crafted for precise, efficient cuts in fiber cement materials. The 10" blade combines a compact 6-tooth design with a sturdy steel construction to deliver fast, straight cuts while keeping tear-out to a minimum on fiber cement panels, siding, and backer boards.
Built for high-speed saws, this blade is rated up to 6700 RPM and fits a 5/8" arbor, a common configuration on many circular saws. The.079" kerf minimizes material waste without sacrificing rigidity, and the 10° hook angle strikes a balance between aggressive cutting and smooth finishes. Whether you’re installing fiber cement siding or trimming cement board, this blade helps you finish the job cleanly and efficiently.
Key advantages
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Fiber cement optimization: specifically designed to handle fiber cement materials for clean, straight cuts.
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Efficient kerf:.079" kerf reduces waste while preserving blade stability for long cuts.
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Durable steel construction: robust build to withstand the demands of jobsite use.
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Arizona-friendly arbor: fits 5/8" arbors common on many circular saws for broad compatibility.
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Low-profile teeth: 6 teeth engineered to deliver quick progression on straight cuts in fiber cement applications.
Technical specifications at a glance
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Diameter: 10 inches
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Arbor size: 5/8 inch
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Teeth: 6
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Kerf:.079 inch
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Hook angle: 10 degrees
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Maximum speed: 6700 RPM
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Material: Steel
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Usage: Fiber cement
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Packaging: Carded
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Brand: Irwin Marathon
Ideal use scenarios
- Fiber cement siding installation and trim where clean, straight cuts are essential
- Cutting cement board and related backer materials for precise fit and finish
- Projects requiring a durable blade with reliable performance in high-speed circular saws
Practical tips for best results
- Clamp work securely and support long cuts to prevent binding or binding chatter.
- Use a dust extraction system or vacuum to manage silica dust generated when cutting fiber cement.
- Keep the blade cool during extended cuts; pause to prevent overheating and prolong blade life.
- Match the saw's RPM to the blade's maximum rating (up to 6700 RPM) for optimal performance.
- Always wear eye and respiratory protection when cutting fiber cement materials.
