OCPTY Mulching Blades 36/52 inch Deck Mower Blades for Ariens: 00273100, 03399704, 04916400, 04917900, 3399704; for Bad Boy: 038-0003-00; for Bobcat: 2722543-02, 32022A,3 pack

What It Is

This is a set of three mulching blades designed for 36-inch and 52-inch zero-turn mower decks, specifically to replace OEM blades on Ariens, Bad Boy, and Bobcat models. They are intended to cut grass into fine clippings that can be left on the lawn without clumping.

Fitment & Compatibility

Before buying, measure your blade length and center hole. These blades are 18.5 inches long (for 52-inch decks) or 13.5 inches long (for 36-inch decks), with a 1-inch center hole and a 0.5-inch offset. They fit Ariens part numbers 00273100, 03399704, 04916400, 04917900, and 3399704; Bad Boy 038-0003-00; and Bobcat 2722543-02 and 32022A. Verify your deck size (36 or 52 inches) and blade count (three per deck). These are aftermarket, so check that your original blades have the same dimensions—especially the distance from the center hole to the blade tip—to avoid clearance issues. If your deck uses a different hole size or offset, these won’t fit.

Key Things to Know

• Installation: Straightforward—use a 5/8-inch socket and torque to 40-50 ft-lbs. Lift the deck safely and remove the old blade (note orientation). These blades are not reversible; the cutting edge faces forward.
• Quality: At $20.99 for three, these are budget blades. They may not hold an edge as long as OEM or premium aftermarket blades, especially in sandy or rocky soil. Expect to sharpen or replace more frequently.
• Common Gotcha: These are mulching blades, not standard lift blades. They produce finer clippings but may not throw clippings as far into a bagger. If you use a side-discharge chute, check that the blade’s shape doesn’t interfere.
• Compatibility Check: Double-check your deck’s exact model year—some Ariens 52-inch decks (e.g., 2021+) may use a different blade offset. Measure your current blade’s thickness (these are 0.1875 inches) and compare to avoid vibration.

Should You Buy It

If you need a quick, cheap replacement for mulching on a compatible Ariens, Bad Boy, or Bobcat zero-turn, these work fine for light residential use. However, if you mow frequently, have tough grass, or want longer life, consider spending more on OEM or thicker aftermarket blades.