Rotary 11231 Pack of 3 Notched High Lift Lawnmower Blade Set

What It Is

The Rotary 11231 is a pack of three notched, high-lift lawn mower blades designed for bagging and side-discharge mowing. The high-lift profile creates stronger airflow to lift grass clippings into the bag or out the chute, making it ideal for thick, tall, or damp grass.

Fitment & Compatibility

Before buying, measure your existing blade’s center hole diameter (must be 1” or 25.4mm), overall length (the Rotary 11231 is 21-1/8” long), and drive type (this is a 5-point star/universal pattern). These blades fit most residential walk-behind mowers with a 21” or 22” cutting deck, including many Craftsman, Husqvarna, Poulan, Murray, and MTD models. Check your mower’s OEM part number—this set replaces common numbers like 11231, 942-0430, 742P, and 532-11231. If your mower uses a single-bolt center (no star pattern), these will not fit. Always confirm deck size and blade mounting system before ordering.

Key Things to Know

• High-lift blades create more drag on the engine, so they may slightly reduce run time on battery mowers or bog down small engines in heavy grass.
• Notched edge design helps reduce clumping and improves mulching performance, but these are primarily for bagging—not true mulching blades.
• Installation is straightforward with a socket wrench and blade removal tool, but always disconnect the spark plug first. Torque the center bolt to 30-40 ft-lbs.
• Quality note: These are aftermarket blades, not OEM. They’re heat-treated and coated for rust resistance, but some users report they wear faster than factory blades in sandy or rocky conditions.

Should You Buy It

If you need a reliable, budget-friendly set of high-lift blades for bagging or side-discharge on a standard walk-behind mower, the Rotary 11231 pack is a solid choice. It’s best for homeowners with medium to large lawns who mow regularly and want better clipping collection without spending OEM prices. Avoid if your mower uses a single-bolt center or if you primarily mulch—look for a dedicated mulching blade instead.