Maxpower 561812B Set of 3, 3-N-1 Blades for 48" Cut John Deere, Replaces AM137757, AM141035, GX21784, GY20852, Black

What It Is

This is a set of three 3-in-1 (mulch, bag, side-discharge) replacement blades for John Deere mowers with a 48-inch cutting deck. They offer flexibility for different mowing conditions without swapping blades.

Fitment & Compatibility

• Deck size: 48-inch cut only. Measure your deck width (blade tip to tip) before ordering.
• Model fit: Fits John Deere X300, X304, X320, X324, X340, X360, X380, X384, X390, X394, X500, X520, X530, X534, X540, X560, X570, X580, X584, X590, X594 series, plus older 400 and 500 series. Not for ZTrak or 60-inch decks.
• OEM replacements: Replaces John Deere parts AM137757, AM141035, GX21784, GY20852. Check your current blade’s part number.
• Measurements: Each blade is 16.5 inches long, 2.5 inches wide, with a 0.25-inch thickness, a 7/16-inch center hole, and a 1-inch three-point star center hole. Verify your spindle’s hole pattern.
• Torque spec: Tighten to 70-90 ft-lbs (check your manual). Use a torque wrench.

Key Things to Know

• 3-in-1 design works well – the mulching action is decent but not as fine as dedicated mulching blades. Best for typical home lawns, not golf-course finish.
• Installation is straightforward – no special tools beyond a socket wrench and blade removal tool (or block of wood). Note: these are uncoated steel; they will rust if stored wet. Keep them dry.
• Balance is factory-checked – but always re-balance after sharpening. Unbalanced blades cause vibration and spindle wear.
• Price is competitive – at ~$37 for a set of three, it’s about half the cost of OEM John Deere blades. Durability is good for residential use; commercial operators may prefer OEM for longer edge life.

Should You Buy It

Buy this set if you have a 48-inch John Deere lawn tractor (X300–X500 series) and want a reliable, low-cost 3-in-1 blade for occasional mulching, bagging, or side discharge. It’s a solid value for homeowners, but if you mow commercially or need premium mulching performance, consider dedicated mulching blades or OEM.