6 Blade GOAT

Is This Tiny Upgrade About to Make My Robot Mower Even Better?

NIX | GADGETS • GARDEN • TECH Estimated read: 8–10 minutes

There are sensible people who buy a robot mower, let it cut the lawn and then leave it alone.

I am apparently not one of those people. 😂

My ECOVACS GOAT O800 RTK already wanders around the lawn doing a remarkably sophisticated job of something that once involved me pushing a mower up and down in straight lines.

It maps the garden.

It navigates using RTK, LiDAR-enhanced positioning and cameras.

It avoids things.

It works its way neatly around the edges.

And underneath all that technology?

Three tiny swinging razor blades.

Which inevitably led to one question:

🤔 WHAT IF I GIVE THE GOAT SIX?

And just like that, another NIX experiment was born.

The ECOVACS GOAT O800 RTK is designed for lawns of up to 800m² and uses a 22cm cutting system with adjustable cutting height between 30mm and 80mm.

ECOVACS quotes mowing efficiency of approximately 140–180m² per hour, depending on conditions. It combines RTK navigation with cameras and 3D ToF sensing, while the mower itself is rated at just 57dB.

That means this isn’t some plastic toy shuffling randomly around the lawn.

There is a surprising amount of technology happening beneath that white shell.

📡 RTK positioning 👁️ AI camera 📐 3D ToF sensing 🧠 intelligent path planning 📱 app control 🌧️ IPX6 water resistance ⛰️ serious slope capability ✂️ automated cutting-height adjustment

And yet its actual contact with the grass comes down to three very simple pivoting blades.

There is something wonderfully agricultural about that.

tiny razor blade goes snip.

🎥 VIDEO: MEET THE O800 RTK

ECOVACS’ own introduction is a good starting point if you’ve never seen what the O800 RTK can actually do.

From the factory, the O800 RTK comes with three cutting blades, and ECOVACS also supplies spare blades.

The cutting width remains 22cm.

The blades aren’t rigidly bolted in position like the blade underneath an old petrol mower.

They pivot.

As the cutting disc spins, centrifugal force swings them outward.

snip.

Then another.

snip.

Then several thousand more.

Simple.

Effective.

And proven.

But here’s where the engineer inside my head starts tapping the glass.

A six-blade conversion doesn’t magically give the mower a 44cm cutting width.

That would require a much larger cutting disc and probably result in my GOAT attempting to scalp the flowerbeds.

The mowing diameter remains essentially the same.

What changes is the number of cutting edges passing through that circle during each revolution.

So, in very simple terms, six blades provide twice as many blade opportunities during each rotation.

That does not automatically mean the mower cuts twice as well.

But it could mean that each clump of grass has more opportunities to meet a cutting edge as the mower moves across it.

And that is interesting.

📊 NIX GRAPHIC: THE THEORY

🟧✂️ ⬜ ⬜✂️ ➡️ 🌱🌱🌱 ⬜ 🟧✂️

✂️ 🔸 ✂️ 🔸 ⚙️ 🔸 ✂️ 🔸 ✂️

🌱🌱🌱🌱🌱 ⬇️ ✂️✂️✂️✂️✂️✂️ ⬇️ ▰▰▰▰▰▰

That is the theory.

Now we need to distinguish theory from lawn reality.

Anyone who has watched a robotic mower long enough will occasionally see it.

One stubborn tuft of grass survives.

The robot travels past it.

The lawn around it looks lovely.

And that solitary blade stands there like it has just won a duel.

Robot-mower owners sometimes call these little survivors mohawks.

Six cutting edges could potentially reduce them simply because more blades cross the cutting circle while the mower is travelling forward.

There are already GOAT owners experimenting with multi-blade discs.

In one ECOVACS GOAT owner discussion, users reported a cleaner-looking cut, fewer surviving tufts and a more carpet-like finish after switching to multi-blade discs. Those are individual owner experiences rather than controlled ECOVACS testing, so I’m treating them as interesting evidence rather than gospel.

And that’s precisely why I want to test it myself.

One particularly interesting option is made by 3Dcbm.

Their six-blade cutting disc explicitly lists:

✅ GOAT O500 ✅ GOAT O600 RTK ✅ GOAT O800 RTK ✅ O800 Panorama ✅ O1200 variants ✅ G1-800 ✅ G1-2000

The manufacturer describes it as an injection-moulded glass-fibre-reinforced plastic disc with over-moulded stainless-steel threaded inserts.

Importantly, it uses the familiar blade mounting arrangement rather than requiring some completely alien cutting system.

That is much more interesting to me than buying the cheapest anonymous plastic disc I can find online.

Because this thing spins.

Fast.

Underneath an expensive robot.

There are places to save £15.

The rapidly rotating bit with six razor blades attached probably isn’t one of them.

🛠️ ANOTHER OPTION: 3DHERB

There is also a six-blade disc from 3DHerb, again specifically listing compatibility with several GOAT models including the O800.

It too is described as being manufactured from glass-fibre-reinforced material rather than basic printed plastic.

At the time I checked, the manufacturer was showing the disc at €29.90, although prices and UK delivery costs can obviously change.

SPEC STANDARD 🌱 Recommended lawn area Up to 800m² ✂️ Cutting width 22cm 📏 Cutting height 30–80mm ⚙️ Standard blades 3 🔋 Battery 4,000mAh lithium-ion 🤫 Noise 57dB 💧 Water resistance IPX6 🧭 Navigation LiDAR-enhanced RTK + camera + 3D ToF 🚀 Claimed mowing efficiency 140–180m²/h

Official specifications:

🧮 BUT WILL SIX BLADES CREATE MORE DRAG?

Now we reach the bit that interests me almost as much as the lawn.

Because there is no free lunch in engineering.

Adding more blades means adding more cutting edges into the rotating system.

Potentially that could mean:

⚡ slightly greater motor load 🔋 slightly higher power consumption 🌱 more grass accumulating around the cutting disc ⚙️ additional resistance in thick grass 🧹 potentially more frequent underside cleaning

The important word there is:

potentially.

I haven’t found controlled ECOVACS data showing the power difference between its standard three-blade carrier and an aftermarket six-blade version.

So claiming something like “six blades uses 8% more battery” would simply be making a number up.

And that’s not how I’m doing this test.

Some GOAT owners who’ve tried aftermarket multi-blade arrangements report no obvious battery penalty, while others have raised the same perfectly sensible question about additional motor load.

So battery performance is going straight onto my test sheet.

This is where things become considerably more interesting.

Rather than fit the new disc, look at the lawn for five minutes and announce:

“Yep. Better.”

I’m going to treat it properly.

PHASE ONE: BASELINE

Run the GOAT using the standard three-blade disc.

Record:

🌱 grass condition 📏 cutting height 🌧️ weather 💧 whether the lawn is wet or dry ⏱️ mowing time 🔋 battery consumption 🏠 charging behaviour 🌿 visible missed tufts ✂️ quality of the cut 🧹 grass buildup beneath the mower

Then photograph several fixed sections of lawn.

Same places.

Same angles.

Same lighting where possible.

⚙️ PHASE TWO: SIX BLADES

Install the six-blade carrier.

Use six identical fresh blades.

Then repeat the same mowing routine.

I’m particularly interested in five things.

Do the ends of the grass look cleaner?

Are there fewer random tufts left standing?

Does the lawn genuinely look smoother or more carpet-like?

Does the GOAT use noticeably more energy completing the same area?

Does twice the blade count produce noticeably more grass buildup underneath?

That should give us something approaching a meaningful comparison rather than lawn-based astrology.

CUT QUALITY 3 blades: ▢▢▢▢▢ 6 blades: ▢▢▢▢▢

MISSED TUFTS 3 blades: ▢▢▢▢▢ 6 blades: ▢▢▢▢▢

BATTERY EFFICIENCY 3 blades: ▢▢▢▢▢ 6 blades: ▢▢▢▢▢

NOISE / VIBRATION 3 blades: ▢▢▢▢▢ 6 blades: ▢▢▢▢▢

GRASS BUILDUP 3 blades: ▢▢▢▢▢ 6 blades: ▢▢▢▢▢

OVERALL LAWN FINISH 3 blades: ▢▢▢▢▢ 6 blades: ▢▢▢▢▢

I can fill this in after a couple of weeks and turn the follow-up into a proper results story.

This might end up being the most interesting part.

The O800 RTK uses a 4,000mAh lithium-ion battery.

If the six-blade carrier creates meaningfully more resistance, I’d expect that eventually to show itself through one or more of:

🔋 shorter mowing sessions ⚡ more frequent charging ⏱️ longer overall completion time 🔥 higher sustained motor load

But if mowing efficiency remains effectively unchanged?

Then we’ve potentially gained a finer cutting action with little practical downside.

That would make the upgrade far more compelling.

🔊 WHAT ABOUT NOISE?

The standard O800 RTK is quoted at 57dB.

I don’t expect six blades suddenly to turn it into a Spitfire.

But I will be listening for:

👂 additional whirring ⚙️ vibration 🔊 resonance ✂️ a different cutting note

Unexpected vibration in particular would make me stop the test immediately.

A rotating disc needs to be balanced properly.

If my GOAT starts crossing the lawn sounding like a washing machine containing a trainer, something has gone wrong.

There is one very important caveat.

ECOVACS’ own blade-replacement instructions state that owners should use ECOVACS-manufactured blades and new screws when replacing blades. ECOVACS also instructs users to power the mower off, wear protective gloves and ensure the blades can rotate freely after installation.

So a six-blade aftermarket cutting carrier is exactly that:

AFTERMARKET.

It isn’t the factory configuration.

I’m therefore keeping the complete original three-blade setup.

That way the mower can be returned to standard configuration whenever necessary.

This is the bit where the jokes stop briefly.

There are actual razor-sharp blades underneath this machine.

Before touching the cutting assembly:

1.

Power the GOAT completely off.

2.

Wear decent protective gloves.

3.

Turn the mower carefully onto a soft surface.

4.

Remove the original cutting assembly carefully.

5.

Inspect the new disc before fitting.

Check for:

🔍 cracks 🔩 damaged threads ⚖️ obvious distortion 🧱 manufacturing defects

6.

Use six matching blades.

I wouldn’t mix:

old and new blades,

different blade brands,

different weights,

or random screws.

7.

Make certain every blade pivots freely.

That last point is specifically included in ECOVACS’ blade-replacement procedure.

🎥 VIDEO: CHANGING GOAT BLADES

This video demonstrates blade replacement on another ECOVACS GOAT model. The exact mower differs from the O800 RTK, but it provides a useful visual explanation of the general blade-replacement concept.

Always follow the O800 RTK’s own instructions for the actual installation.

There is another important point here.

A six-blade mower with six blunt blades isn’t necessarily superior to a three-blade mower with three razor-sharp ones.

A cleanly cut blade of grass heals better and looks better.

A dull blade can tear and bruise the grass instead.

So before declaring six blades victorious, the comparison needs to be:

SIX SHARP BLADES.

Otherwise we’re testing blade condition rather than blade quantity.

Naturally, I’m testing this in Britain.

So approximately fourteen minutes after fitting the new disc, the sky will presumably open.

Which presents another variable.

Wet grass behaves very differently from dry grass.

It sticks together.

It clumps.

It can accumulate beneath the mower.

So I actually want to see how six blades cope in:

☀️ dry summer-style conditions 🌤️ normal lawn conditions 💦 slightly damp grass

I’m rather less interested in sending it into a monsoon just to prove a point.

My working hypothesis is fairly straightforward.

I don’t expect:

❌ twice the mowing speed ❌ twice the cutting width ❌ twice the battery consumption ❌ some miraculous golf-green transformation overnight

What I do think is plausible is:

✅ fewer isolated missed blades ✅ slightly more consistent cutting ✅ finer clipping ✅ smoother overall appearance ✅ potentially slower wear per individual blade because six cutting edges share the work

That last point is also claimed by aftermarket six-disc manufacturers, although I want to see how it performs over time rather than simply accept the claim.

🟧 THREE BLADES VS SIX: THE NIX THEORY BOARD

🐐 STANDARD 🐐⚡ SIX-BLADE Blades 3 6 Cutting width 22cm Approximately unchanged Cutting opportunities/revolution 3 6 Factory approved ✅ ❌ aftermarket Potential finish Already good Possibly finer Potential missed tufts Normal Possibly fewer Potential drag Factory baseline Possibly slightly higher Proven O800 battery impact Factory spec Unknown NIX curiosity level 🙂 🤯

And that last row may be the most important one.

🐐 THIS IS WHY I LOVE THIS SORT OF TECH

Modern robotic lawnmowers are fascinating because they sit at a weird crossroads.

On one side:

satellites.

AI.

computer vision.

LiDAR.

mapping algorithms.

wireless connectivity.

automated charging.

Then, underneath the machine:

I love that.

And modifying the cutting disc doesn’t change the clever part of the GOAT.

The navigation remains the same.

The map remains the same.

The RTK system remains the same.

The mowing width remains essentially the same.

We’re simply changing what happens during the final few millimetres between machine and grass.

Sometimes that is where the biggest visible difference appears.

So that’s the plan.

Photograph the lawn with the standard three-blade setup.

Record normal battery performance.

Fit six fresh blades.

Run exactly the same lawn.

Repeat for several mowing cycles.

Photograph everything again.

Then we’ll answer the question properly.

🐐 IS SIX REALLY BETTER THAN THREE?

Not because the internet says it is.

Not because a seller says it is.

Not because six is a bigger number.

We’ll find out on the lawn.

There are really only three.

Cleaner lawn.

Fewer stragglers.

No meaningful battery penalty.

Upgrade stays.

SLIGHTLY BETTER, BUT HARDLY NOTICEABLE

but perhaps unnecessary.

More drag.

More clogging.

More vibration.

No visible improvement.

Original disc goes straight back on.

And that’s perfectly fine.

A useful experiment doesn’t have to prove the modification was brilliant.

It just has to answer the question.

Never modify something simply because you can.

Modify it because you can measure whether it became better.

sometimes I modify things because they look brilliant too.

Vanilla’s orange bits would like a word.

But you get the point.

The GOAT O800 RTK is already one of those pieces of technology that quietly changes a household routine.

It disappears onto the lawn.

Cuts.

Returns home.

Charges.

Heads back out.

No fuel.

No pulling starter cords.

No dragging cables around.

No Sunday afternoon disappearing behind a lawnmower.

Now I’m going to see whether one small piece of engineering underneath it can make that already impressive job just a little bit better.

Three blades have done a fine job.

But six blades are coming.

And the lawn is about to become the laboratory.

ECOVACS UK: GOAT O800 RTK⁠