Exchange-A-Blade’s 7-1/4″ x 4T Fiber Cement Blade delivers over 8,000 cuts in fiber cement siding: that’s roughly 75 times longer than standard carbide blades. The secret lies in its Polycrystalline Diamond (PCD) layer on carbide tips, the same technology used in industrial mining equipment. For contractors cutting Hardie Plank daily, this blade transforms a weekly expense into a once-per-season investment.
The 4-tooth FTG (Flat Top Grind) design with a 15-degree hook angle rips through fiber cement fast. Fewer teeth means less resistance, which translates to faster cuts and less strain on your saw motor. The blade generates minimal dust during cutting: a real benefit when you’re working near finished surfaces or occupied homes.
| Specification | Value | Source |
|---|
| Diameter | 7-1/4 inches (184 mm) | Manufacturer |
| Teeth | 4 | Manufacturer |
| Tooth Type | FTG (Flat Top Grind) | Manufacturer |
| Tip Material | Polycrystalline Diamond (PCD) layer on carbide | Manufacturer |
| Arbor Size | 5/8 inch DKO (Double-Keyed) | Manufacturer |
| Hook Angle | 15 degrees | Manufacturer |
| Maximum Speed | 8,000 - 9,000 RPM | Manufacturer |
| Performance | > 8,000 cuts in fiber-cement siding | Manufacturer |
The blade fits any standard 7-1/4 inch circular saw with a 5/8 inch keyed arbor. No special adapters. No proprietary mounting systems. It’ll work with that beat-up Skilsaw you’ve had for years or the latest cordless Milwaukee.
Real-World Application
This blade is specifically engineered for Hardie Plank and Cemplank siding, but it handles any fiber cement substrate. The design covers cutting, trimming, and ripping fiber-cement boards. That versatility matters when you’re switching between lap siding, trim boards, and soffit panels throughout the day.
Montana contractors face unique challenges: long drives between supply houses mean blade failures cost more than just money. When the nearest lumber yard is 66 miles away (like Eureka to Kalispell), a blade that lasts 75 times longer than standard carbide becomes a scheduling advantage.
For a siding contractor cutting 50 boards daily, that’s the difference between buying a new blade every other day versus once every four months.
Installation and Safety
Installation follows standard blade replacement procedure: disconnect power, align the 5/8 in DKO arbor with the blade key slot, tighten arbor bolt to tool manufacturer specifications (typically 5-7 Nm), and perform a low-speed test cut before full use.
The 4-tooth design means more aggressive cutting action than fine-finish blades. Keep firm control of the saw and let the blade do the work: forcing it through material defeats the purpose of those PCD tips.
Frequently Asked Questions
Q: Will this blade work with my cordless saw?
A: Yes, it’s compatible with any standard 7-1/4 inch circular saw (corded or cordless) with a 5/8 inch keyed arbor. Maximum speed rating is 8,000 - 9,000 RPM, which covers all standard circular saws.
Q: What’s the actual warranty coverage?
A: EAB offers an Unconditional Satisfaction Guarantee: if the blade doesn’t meet or exceed original factory specifications, return it to a retail store for a free replacement or full refund.
Q: How does PCD compare to standard carbide for fiber cement?
A: The Polycrystalline Diamond layer delivers over 8,000 cuts in fiber cement, while standard carbide blades typically manage 100-150 cuts before dulling. PCD maintains its cutting edge through abrasive materials that quickly wear down carbide.
Q: What about dust control?
A: The blade design generates minimal dust during cutting. The 4-tooth configuration and sharp PCD tips create cleaner cuts with less material pulverization compared to worn carbide blades.
