XHT 3 USA Heavy Duty MARBAIN Blades for Gravely 03253900 038605000 ZTHD 60"

What It Is

This is a set of three heavy-duty MARBAIN mulching blades designed specifically for Gravely ZTHD 60" zero-turn mowers. They replace OEM part numbers 03253900 and 038605000 and are built for high-use commercial or tough residential mowing conditions.

Fitment & Compatibility

Before buying, verify these three things:

1. Deck size: Must be exactly 60 inches. This set includes three blades (each roughly 20.5 inches long) for a three-blade spindle configuration.
2. Model match: Fits Gravely ZTHD 60" models. Also compatible with some Pro-Turn and other Gravely zero-turn mowers using the same OEM blade numbers. Check your owner’s manual or current blade part number.
3. Measurements: Confirm blade length, width (approx. 2.5–3 inches), center hole diameter (usually 7/16" or 5/8"), and thickness (0.25" or 6mm). MARBAIN blades are aftermarket, so dimensions may vary slightly from OEM—measure your old blade or deck clearance to avoid contact issues.

Key Things to Know

• Quality: MARBAIN is a heavy-duty aftermarket brand known for thicker steel and longer edge life than standard OEM blades, but they may require more engine power to spin.
• Installation: Moderate difficulty. You’ll need a wrench and a blade removal tool (or a block of wood to hold the blade). Torque to manufacturer specs (usually 70–90 ft-lbs). Re-sharpen or replace every 25–50 hours of mowing.
• Common gotchas: These blades are mulching-style, not lift or bagging blades—they’ll leave clippings on the lawn if you don’t mow frequently. Also, check that the blade bolt pattern matches your spindle (some Gravely spindles use a different offset).
• Balance: Always balance new blades before installing. Unbalanced blades cause vibration, bearing wear, and poor cut quality.

Should You Buy It

If you own a Gravely ZTHD 60" and want a durable, cost-effective alternative to OEM blades for heavy mulching or tough grass conditions, this set is a solid choice. It’s not ideal for bagging or if you need a high-lift blade for wet grass. Verify fitment with your specific deck model before purchase.