Troy-Bilt Original Equipment High-Lift Blade Set for 46 in. Lawn Tractors and Zero-Turns with S-Shaped Center, OE# 742P05510

What It Is

This is a set of three OEM high-lift blades designed for Troy-Bilt 46-inch lawn tractors and zero-turn mowers. The S-shaped center and high-lift profile increase airflow under the deck for superior vacuum and bagging performance, making them ideal for mulching or collecting leaves and grass clippings.

Fitment & Compatibility

Before buying, confirm your mower has a 46-inch cutting deck (not 42 or 50 inches). These are genuine Troy-Bilt parts (OE# 742P05510) and fit most Troy-Bilt tractors and zero-turns with that deck size, including select models from Cub Cadet, MTD, and Yard Machines. Measure your existing blade length — it should be approximately 20.5 inches from tip to tip, with a 1-inch center hole and an S-shaped cutting edge. Check your owner’s manual or existing blade part number; if it ends in 742P05510 or a cross-reference number, you’re good. Do not use on non-Troy-Bilt decks without verifying the center hole shape and spindle pattern.

Key Things to Know

• High-lift vs. standard: These blades create more suction than low-lift blades, but they require more engine power and can cause increased wear on the deck and spindles in wet or heavy grass.
• Installation: Straightforward — remove the old blade, clean the spindle, and torque the bolt to 70–90 ft-lbs. Use a blade removal tool (not a wrench alone) to avoid stripping the bolt.
• Balance: Each blade is pre-balanced from the factory, but always check with a blade balancer after sharpening. An unbalanced blade will vibrate and damage spindles.
• Sharpening: These are heat-treated steel; sharpen with a file or grinder at a 30-degree angle, but avoid removing too much metal — replace when worn past the cutting edge.

Should You Buy It

If you own a Troy-Bilt 46-inch tractor or zero-turn and demand OEM quality for bagging or heavy mulching, this set is a no-brainer — it’s durable, perfectly matched to your deck, and backed by strong reviews. For occasional use or non-Troy-Bilt decks, a cheaper aftermarket blade may work, but you risk fitment issues and reduced lift performance.