Ariens Gravely 00450300 18" Mower Blade 52" Cutting Decks 152 Pro-Turn Lawn Mowers

What It Is

The Ariens Gravely 00450300 is an OEM replacement blade designed for 52-inch cutting decks on Ariens and Gravely Pro-Turn mowers. It’s a medium-lift, 18-inch blade intended for general residential and commercial mowing.

Fitment & Compatibility

Before buying, verify your mower has a 52-inch deck—this blade fits only that size. Compatible models include the Ariens 915152, 915157, 915163, 915168, 915169, and Gravely 915087, 915089, 915091, 915092, 915093, 915094, 915095, 915096, 915097, 915098, 915099, and 915100 Pro-Turn series. The blade’s center hole diameter is 7/8-inch, and it has a 3/8-inch offset. Measure your current blade’s length (18 inches), hole size, and thickness (0.203 inches) to confirm match. Using a non-OEM blade may affect balance or deck clearance.

Key Things to Buy

• Quality: Genuine Ariens/Gravely part, heat-treated steel for durability. Expect 50–100 hours of life depending on debris and mowing frequency.
• Installation: Simple bolt-on job with a socket wrench—no special tools. Torque blade bolts to 70–90 ft-lbs. Always replace in sets of three for even cutting and balance.
• Gotchas: Check blade orientation—sharp edge faces forward, lift wing points up. A common mistake is installing upside down, which ruins cut quality and stresses the spindle. Inspect spindles and belts while you’re under the deck.
• Safety: Disconnect spark plug before working. Use gloves—blades are sharp.

Should You Buy It

If you own an Ariens or Gravely Pro-Turn with a 52-inch deck and want a direct, hassle-free OEM replacement, this is a solid choice. It’s priced competitively with aftermarket options and backed by the brand’s quality. Ideal for homeowners or landscapers who prioritize fitment certainty over saving a few dollars.