Three grams of steel, sold thirty at a time

Replacement robot mower blades, compared

A robot mower does not cut with a bar: it cuts with three or four razor blades the size of a stamp, screwed to a spinning disc and replaced as a set every one to three months. That is the entire logic of this shelf, and it explains why packs of thirty, forty-five and sixty-four are normal here. The length and the thickness are the two dimensions that decide fit — around 45 mm long and 0,75 mm thick on the Husqvarna pattern that most of the market copies — and they matter because a blade that is too thick fouls the disc and one that is too thin flexes instead of cutting. The material is where these listings compete: plain steel, titanium-coated, or carbon, each claiming a longer edge. A coated blade genuinely lasts longer in sandy soil, and no listing here publishes a figure for it, so a page can name the claim and not the duration. The fits column is the one that decides everything else. Husqvarna Automower and Gardena share a pattern; Worx Landroid uses another; Mammotion LUBA and the newer wire-free machines use their own. Several sets here name three or four platforms at once and several say « für alle », which on this shelf is a claim about a mounting hole rather than about every robot. And the pack is not a detail: the screws are the part that rounds off, and a set sold without them is a set that will be fitted with the old ones. We compare length, thickness, material, fits and pack.

Every part here, laid out figure by figure

1. 

   STONE REEF SR-1332

   Thirty stainless blades with a titanium carbide alloy, for eleven named machines — and the only listing that says it is not an original part.

   Length

   Not published

   Thickness

   Not published

   Material

   Stainless steel with a titanium carbide alloy, as stated

   Fits

   Eleven named machines across six brands — the maker states this is not an original part and that the blade shape and hole pattern should be compared first

   Pack

   30

   Amazon reference

   B0FTSCSRZR (one reference across 5 Amazon marketplaces)

   EAN

   4262384161616

   • The only listing here that states it is not an original part and tells you to check the hole pattern
   • Explains why thirty: a robot carries three to six and the whole set is changed together
   • No length and no thickness published — nothing to compare against an original

   Best for: A season’s supply for one of the eleven named machines, after checking a blade against the photograph

   Check price on Amazon
2. 

   Glanxy GLAN-055

   Thirty blades at the standard 0.75 mm and 3 g, titanium nitride coated, double-ground, with thirty screws.

   Length

   Not published

   Thickness

   0.75 mm, described as the standard thickness

   Material

   Stainless steel with a titanium nitride coating; 3 g per blade

   Fits

   Three named brands, stated to replace original blades directly

   Pack

   30 blades and 30 screws

   Amazon reference

   B0FBGQSPVN (one reference across 6 Amazon marketplaces)

   EAN

   0797457691416

   • Thickness and weight both published, and both match the usual original figures
   • Thirty screws included, and the thread depth is described as optimised against loosening
   • No length published

   Best for: A season’s supply on a machine from one of the three named brands

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3. 

   Amteker SH0013-SL-SET

   The only listing here that publishes a working life: four to five weeks on 600 m² at five days a week.

   Length

   Not published

   Thickness

   0.75 mm, as stated

   Material

   Stainless steel with a titanium nitride coating; 3 g per blade

   Fits

   Three named brands, stated as suitable for all their models

   Pack

   30 blades and 30 screws

   Amazon reference

   B085955TJ1 (one reference across 3 Amazon marketplaces)

   EAN

   0711745883017

   • A published working life with its conditions: 4–5 weeks on 600 m² at five days a week
   • Thickness and weight both stated, matching the usual original figures
   • “All models of three brands” is a claim rather than a model list

   Best for: Anybody who wants to know how long a set actually lasts before deciding how many to buy

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4. 

   Filzada 15× Carbon

   Fifteen blades rather than thirty, carbon coated, with screws described as having a shoulder to protect the thread.

   Length

   Not published

   Thickness

   Not published

   Material

   Carbon-coated rust-resistant steel

   Fits

   Twelve named machines across three brands

   Pack

   15 blades with screws

   Amazon reference

   B08YRV86YH (one reference across 5 Amazon marketplaces)

   EAN

   4260517112870

   • Twelve specifically named machines rather than three brand names
   • The screws are described as having a shoulder, which protects the disc’s thread during fitting
   • No thickness and no length published

   Best for: A robot on a small lawn or a short season, where thirty blades would be more than a year’s supply

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5. 

   Husqvarna Original 9-pack

   The machine maker’s own blades in a pack of nine with screws — carbon steel rather than coated stainless.

   Length

   Not published

   Thickness

   Not published

   Material

   Carbon steel, as stated

   Fits

   All of the maker’s own robot models, as stated

   Pack

   9 blades and screws

   Amazon reference

   B074PKZHL8 (one reference across 6 Amazon marketplaces)

   EAN

   7391736319799

   • The machine maker’s own part, with no compatibility question at all
   • Nine blades and nine screws — a change and a half, or three changes on a three-blade disc
   • Carbon steel rather than coated stainless, so corrosion resistance depends on use rather than a coating

   Best for: An owner who wants the manufacturer’s own part and does not want to compare hole patterns

   Check price on Amazon
6. 

   BEOS 30× Worx Blade

   Thirty hardened stainless blades at 0.9 mm with titanium carbide, for the five-brand platform the other sets here do not fit.

   Length

   Not published

   Thickness

   0.9 mm, as stated

   Material

   Stainless steel, additionally hardened, with a titanium carbide coating

   Fits

   Five named brands — a different robot platform from the other sets on this shelf

   Pack

   30 blades and screws

   Amazon reference

   B08DDJFSJX (one reference across 5 Amazon marketplaces)

   EAN

   4270001565907

   • Covers the second robot platform, which five of the seven sets here do not fit
   • The thickest blade on the shelf at 0.9 mm, hardened as well as coated
   • 0.9 mm is thicker than the 0.75 mm the other sets quote — check what your machine takes

   Best for: A robot from the second platform — the brands the rest of this shelf does not name

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7. 

   3DHerb SG-SWNI

   Thirty titanium carbide blades with screws and thread locks in a storage box, named for twelve specific machines.

   Length

   Not published

   Thickness

   Not published

   Material

   Stainless steel with a titanium carbide coating

   Fits

   Twelve named models of one range, plus three further brands stated

   Pack

   30 blades and 30 screws, in a storage box

   Amazon reference

   B0D9QZTMMS (one reference across 5 Amazon marketplaces)

   EAN

   4262413340678

   • Twelve specific machine models named, not just a brand
   • A storage box, which is where thirty small sharp blades should live
   • No thickness and no length published

   Best for: One of the twelve named machines, with somewhere sensible to keep the spares

   Check price on Amazon