Stens 330-150 Blade, Pack of 3

What It Is

The Stens 330-150 is a set of three 20.5-inch universal replacement mower blades designed for commercial and residential zero-turn mowers, typically used for medium-to-heavy cutting conditions. These are standard-duty blades suited for general grass cutting, not mulching or bagging.

Fitment & Compatibility

Before buying, verify three things:

• Deck size: These blades fit decks requiring 20.5-inch blades (measured from tip to tip). Measure your current blade’s length—do not guess based on deck width.
• Mounting pattern: The Stens 330-150 has a 5-point star center hole with a 1-inch diameter. Check that your spindle matches this pattern (common on many Gravely, Hustler, and Scag decks).
• OEM cross-reference: Replaces OEM numbers like Gravely 47000, Hustler 28959, and Scag 48033. If your mower uses a different spindle pattern (e.g., 7-point star or round hole), these won’t fit.
• Thickness: Blades are 0.204-inch thick—standard for residential/light commercial use. Heavy-duty decks may require thicker blades.

Key Things to Know

• Quality: Stens is a reputable aftermarket brand, but these are not OEM. They may wear faster or balance slightly off compared to factory blades. Inspect balance before installation.
• Installation: Straightforward—remove old blades, clean spindle, torque bolts to manufacturer spec (typically 70-90 ft-lbs). Use a thread locker if recommended.
• Common gotcha: The 5-point star hole is universal, but some zero-turn spindles use a different pilot diameter. Measure your spindle’s center hole diameter (should be 1 inch) before ordering.
• Pack of 3: Useful if you have a 3-blade deck. For 2-blade decks, you’ll have a spare.

Should You Buy It

Buy these if you need a budget-friendly, reliable replacement for a standard 20.5-inch, 5-point star blade on a zero-turn mower and don’t require OEM-specific performance. Avoid them if your deck uses a different mounting pattern or you need heavy-duty blades for rough or rocky terrain.