24 Pcs Robot Lawn Mower Blade Mounting Washers Compatible with Mammotion Luba & Yuka – Prevent Grass Build-Up, Fit 2 mm Shoulder Screws (Not for Original Blades)

What It Is

A 24-piece set of mounting washers designed to replace the stock washers on Mammotion Luba and Yuka robot mowers. Their primary job is to reduce grass buildup around the blade pivot point by providing a slightly larger surface area and a smoother face, which helps prevent clippings from sticking and jamming the blade.

Fitment & Compatibility

• Exact models: Works with Mammotion Luba (all generations) and Yuka robot mowers. Does not fit other brands (e.g., Husqvarna, Worx, Robomow).
• Screw size required: These washers are made for 2 mm shoulder screws. Your mower must use that size – check your existing screw’s shoulder diameter with a caliper. If it’s 2 mm, these fit; any other size won’t work.
• Blade type: Specifically designed for aftermarket blades. They will not work with the original Mammotion blades (the hole pattern or thickness differs). If you still use OEM blades, skip this set.
• What to measure: The washer’s inner diameter is 2.1 mm, outer diameter is 8 mm, and thickness is 1.2 mm. Confirm your blade pivot hole and screw head clearance match these dimensions.

Key Things to Know

• Installation difficulty: Easy – just remove the blade screw, swap the old washer for one of these, and re-tighten. No special tools needed.
• Build quality: Made of stainless steel, but some users report slight burrs on the edges. File them smooth if needed to avoid scratching the blade pivot.
• Grass buildup reduction: Works well in damp or tall grass conditions. Not a miracle cure – you’ll still need to clean the deck occasionally, but buildup frequency drops noticeably.
• Common gotcha: The 3.9 rating is based on only 8 reviews, so long-term durability is unproven. Also, if your mower has metric 2.5 mm shoulder screws, these washers will be too loose and cause blade wobble.

Should You Buy It

If you own a Mammotion Luba or Yuka, use aftermarket blades, and struggle with grass jamming around the blade pivot, this $8.99 set is a cheap, low-effort fix. Skip it if you’re still on OEM blades or have a different robot mower brand – compatibility is narrow. For the price, it’s worth trying, but manage expectations on longevity.