Heavy Duty AR400 Steel Replacement Bush Hog Rotary Cutter Blades, for Mower King Skidsteer Brush Hog Cutter Replacement Blades Rotary Grass Cutter (4 Blade Set) Review

Overview

The Heavy Duty AR400 Steel Replacement Bush Hog Rotary Cutter Blades are a specialized, heavy-duty blade set designed for skid steer-mounted brush hog attachments, specifically the Mower King brand. These are not for standard riding or push mowers—they are built for extreme vegetation management, targeting dense brush, saplings, and thick grass on properties requiring industrial-grade clearing. At $118.50 for a 4-blade set, they cater to landowners, contractors, and farmers who need reliable replacement blades for demanding cutting tasks.

Who Should Buy This

• Landowners with heavy brush and small trees: If you regularly clear overgrown fields, blackberry thickets, or saplings up to 1-2 inches in diameter, these AR400 steel blades are built to withstand repeated impacts without chipping or bending.
• Skid steer operators with Mower King attachments: This set is specifically designed to fit Mower King brush hog cutters. If you own or rent a skid steer with this brand, these blades are a direct replacement that saves you the hassle of modifying generic blades.
• Contractors maintaining rural properties: For professionals who clear fence lines, ditch banks, or abandoned lots, the AR400 steel offers superior wear resistance compared to standard AR200 or AR300 blades, meaning less downtime for sharpening or replacement.
• DIY farmers and homesteaders: If you maintain pastures, trails, or food plots and already invest in heavy equipment, this 4-blade set provides the durability needed for frequent, rough cutting without breaking the bank compared to OEM parts.

Key Features Breakdown

• AR400 Steel Construction: AR400 stands for Abrasion Resistant steel with a hardness of 400 Brinell. This is a major upgrade from standard AR200 (200 Brinell) found on many budget blades. It means the edge stays sharper longer when cutting through gritty, sandy soil or abrasive dry grass, and it resists deformation when hitting rocks or hidden stumps. For heavy brush work, this matters because softer blades dull quickly and require constant sharpening.
• Compatibility with Mower King Skidsteer Brush Hog: This set is engineered to bolt directly onto Mower King rotary cutter attachments. This eliminates the need for drilling new holes or grinding down bolt slots—a common headache with universal blades. If you own a Mower King, these are a drop-in replacement.
• 4-Blade Set: Most skid steer brush hogs use two or four blades. This set includes four blades, making it a full replacement for a single deck. This is ideal if you want to replace all blades at once for even cutting performance, rather than mixing old and new.
• Heavy-Duty Thickness: While exact thickness isn’t listed, AR400 blades in this class are typically 0.5 to 0.625 inches thick. This thickness provides the mass needed to swing through dense vegetation without flexing, which reduces vibration and stress on the gearbox.
• Price Point at $118.50: For a 4-blade set of AR400 steel, this is competitive with OEM replacements that often cost $40–$50 per blade. It offers a cost-effective way to maintain heavy-use equipment without sacrificing material quality.

Pros

• Exceptional durability: AR400 steel handles rocks, roots, and saplings far better than standard blades, making it ideal for rough terrain.
• Direct fit for Mower King: No modifications needed—bolts align perfectly with existing mounting points, saving time during installation.
• Cost-effective per blade: At about $29.63 per blade, this set undercuts many brand-name alternatives while offering comparable material specs.
• Reduces downtime: The wear resistance means fewer sharpenings per season, which is critical when you have acres to clear.
• Balanced cut: A full 4-blade set ensures even wear and consistent cutting height across the deck, preventing scalping on uneven ground.
• Good for extreme conditions: If you’re cutting in rocky, dusty, or overgrown areas where lighter blades would fail, these hold up.

Cons

• Limited compatibility: These are specifically for Mower King skid steer brush hogs. They won’t fit popular brands like Land Pride, Bush Hog, or Woods without modification—and modifying AR400 steel is difficult (requires carbide drills and grinders).
• Heavy weight: AR400 blades are heavier than standard ones, which can put additional stress on the skid steer’s gearbox and hydraulic system, especially on older or lower-horsepower machines.
• Price may be high for occasional users: If you only clear light brush once a year, these blades are overkill. Standard AR200 blades would suffice at half the cost.
• Only 2 reviews: With only 2 ratings, long-term performance data is thin. Early adopters should be prepared for potential fitment or quality variance.

Bottom Line

If you own a Mower King skid steer brush hog and regularly tackle heavy brush, saplings, or rocky terrain, the Heavy Duty AR400 Steel Replacement Bush Hog Rotary Cutter Blades are a smart investment. The AR400 steel offers real durability advantages over generic blades, and the direct-fit design simplifies installation. They’re not for light-duty mowing or for other brands, and the weight may challenge smaller machines. But for the price—about $30 per blade—you’re getting industrial-grade performance that should outlast cheaper alternatives. I recommend this set for serious land clearing where reliability matters more than upfront savings.

Frequently Asked Questions

Q: Will these blades fit my Land Pride or Bush Hog skid steer cutter? A: No, these are designed specifically for Mower King attachments. The bolt pattern, center hole diameter, and blade length are unique to that brand. Attempting to retrofit them to other brands would require drilling or grinding AR400 steel, which is extremely difficult without specialized tools. Always measure your existing blades or consult the Mower King model number before purchasing.

Q: Do these blades come with bolts or hardware? A: Based on the product listing, this is a 4-blade set only—no hardware included. You’ll need to reuse your existing bolts, washers, and lock nuts. If your hardware is worn or rusted, order a replacement bolt kit separately. Never reuse damaged bolts on heavy brush hogs, as failure can cause blade detachment.

Q: How often should I sharpen these AR400 blades? A: That depends on what you’re cutting. In thick brush with minimal soil contact, you might get 20–30 hours of use before dulling. In sandy or rocky conditions, expect 10–15 hours. The good news is AR400 holds an edge longer than AR200, but when it does dull, sharpening requires a high-grit angle grinder or bench grinder—avoid overheating the edge, as it can soften the steel. Some users choose to replace rather than sharpen AR400 blades when the cost per hour is low.