2PK USA Mower Blade for 42" John Deere E100, E110, E120, E130, E140

What It Is

This is a two-pack of USA-made replacement mower blades designed for 42-inch cutting decks on John Deere E100-series lawn tractors. They’re intended for standard residential grass cutting, not mulching or bagging.

Fitment & Compatibility

• Deck size: Only fits 42-inch John Deere decks (model numbers typically stamped on deck top or side).
• Compatible models: E100, E110, E120, E130, E140 (verify your tractor’s model plate under the seat or hood).
• OEM cross-reference: Replaces John Deere part numbers GY20785, GY20806, GY20930. These are aftermarket, not OEM, but match original dimensions.
• Measurements: Blade length is 21 inches (center hole to tip), with a 5-point star center hole and 0.25-inch thickness. Confirm your existing blade matches these specs before ordering.
• What to check: Lift your deck, remove one blade, and compare length, hole shape, and thickness. Star pattern must match—round or oval holes won’t fit.

Key Things to Know

• Quality: Made in USA from heat-treated carbon steel; holds edge well for residential use. Not as durable as OEM for heavy or rocky terrain.
• Installation: Medium difficulty—requires a socket wrench, torque wrench (recommended 70-90 ft-lbs), and blade removal tool or block of wood to prevent spinning. Always reinstall with sharp edge facing deck rotation (usually clockwise from below).
• Gotchas: These are standard lift blades—not high-lift or mulching. If you bag clippings, you may need a different blade. Balance check after installation is recommended (use a blade balancer) to avoid vibration.
• Two-pack value: Cheaper per blade than single OEM replacements, but you must replace both at once for even cutting.

Should You Buy It

If you own a 42-inch John Deere E-series tractor and need reliable, affordable replacement blades for flat lawns without heavy debris, this two-pack is a solid buy. Avoid if you require OEM durability for rough conditions or need mulching/bagging-specific blades.