00450300 High Lift Fit for Gra vely 52 Inch Mower Blades Z Pro-Turn 152 Pro-Master 152i Pro-Master 152 52 Deck Zero Turn Mowers

What It Is

This is a set of three high-lift blades designed for 52-inch cutting decks on Gravely zero-turn mowers, specifically the Z Pro-Turn 152, Pro-Master 152, and Pro-Master 152i. The aggressive lift profile increases airflow under the deck for superior grass discharge and bagging performance, especially in thick or damp grass.

Fitment & Compatibility

Before buying, verify these three things:

• Deck size: Must be exactly 52 inches. These blades come as a set of three (each ~18 inches long).
• Model match: Fits Gravely Z Pro-Turn 152 (model 915152), Pro-Master 152 (model 915152), and Pro-Master 152i. Not for other Gravely models unless they share the same 52-inch deck.
• OEM cross-reference: Replaces Gravely OEM part numbers 00450300. Check your current blade’s part number or center hole pattern (likely a 5-point star or 5/8" round center hole with offset mounting holes).
• Measurement check: Measure your existing blade length (end to end) and center hole diameter. These blades have a 5/8" center hole and 0.203" thickness. If your spindle uses a different center hole or thickness, they won’t fit.

Key Things to Know

• Lift vs. standard blades: High-lift blades create more suction, which improves bagging and side discharge but increases engine load and fuel consumption slightly. Not ideal for mulching unless you swap to a dedicated mulching blade.
• Installation tip: Use a blade removal tool or block of wood to lock the blade when loosening the bolt. Torque to 70-90 ft-lbs. Recheck after first mowing.
• Balance check: Aftermarket blades sometimes need balancing. Use a blade balancer before installing to avoid vibration that can damage spindles.
• Wear indicator: Replace when blade edge is dull or if the blade is bent. Cutting grass with dull blades tears the grass, leading to brown tips.

Should You Buy It

If you own a Gravely 52-inch Z Pro-Turn or Pro-Master and primarily bag or side-discharge grass, this is a solid, well-rated aftermarket option that saves you about 30% vs. OEM. For mulching, look for a dedicated mulching blade. Check your deck’s center hole pattern and blade length before ordering—if it matches, you’re good to go.