CUB CADET 942-04308A 21.23" Blade RZT42 XT1-LT42 XT2-LX42 LTX1040 LTX1042 ZT1-42 42" Mowers

What It Is

This is a genuine OEM 21.23-inch replacement blade for 42-inch Cub Cadet mower decks. It’s designed for cutting grass on residential lawns and is a direct swap for the original blade on compatible models.

Fitment & Compatibility

Before buying, confirm your mower has a 42-inch deck and that the blade length is 21.23 inches center-to-center (mounting holes to blade tip). The part number 942-04308A fits these Cub Cadet models: RZT42, XT1-LT42, XT2-LX42, LTX1040, LTX1042, and ZT1-42. It’s an OEM part, not aftermarket, so it matches factory specs. Also check that your spindle uses a 5-point star center hole (common on these models) and that the blade thickness is about 0.25 inches. Avoid assuming it fits older or non-listed Cub Cadet models—measure your old blade first.

Key Things to Know

• Quality: OEM means consistent steel hardness and balance. Some users report slightly duller edges out of the box compared to premium aftermarket blades, but it’s reliable for standard cutting.
• Installation: Easy to swap with a socket wrench and torque to 70-90 ft-lbs. Use a blade removal tool or block the blade to prevent spinning. No special skills needed.
• Gotcha: The 3.8 rating reflects mixed reviews—some report the blade arriving with minor edge burrs or being slightly off-balance. Check for wobble after install and sharpen if needed.
• Life span: With regular use on grass (no rocks or debris), expect 25-50 hours before sharpening. Replace if bent or nicked.

Should You Buy It

Buy this if you want a guaranteed factory-fit blade for your 42-inch Cub Cadet and prefer OEM reliability over cheaper aftermarket options. It’s best for standard residential mowing where consistent cut and easy installation matter most. Skip it if you need a heavy-duty mulching or lifting blade—this is a basic high-lift design.