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Tuning blade discs for robotic mowers

Wider cut. Less trimming.

Does your robotic mower leave grass standing along the edges? Our tuning blade discs widen the cut to up to approx. 24 cm and carry up to 9 blades instead of 3. For cleaner edges and noticeably less touch-up work.

Over 400 blade discs sold

3D rendering of the 21 cm tuning blade disc with 9 stainless steel blades and brass threaded inserts, top view
approx. 24 cm cutting widthØ 21 cm disc9 stainless steel blades
Available in 4 sizes – shown to scale

Premium21 cm with 9 blades · largest model

  • Discs made in Germany
  • Ships by the next working day
  • Free large-letter shipping across the EU
  • 14-day right of withdrawal
  • Secure payment

The problem

The edge stays uncut. Week after week.

Your robotic mower reliably takes care of the lawn, but along edges, flower beds and walls a strip of grass is left standing. So out comes the trimmer again.

The tuning blade disc widens the cut considerably. Your mower gets closer to the edge, and there is noticeably less touch-up work.

Standard discStrip left standing
Tuning discMuch closer to the edge
Wider swath per pass
+50%
Fewer passes for the same area (calculated)
−33%

Schematic illustration, mower simplified. Cutting widths in correct proportion: original approx. 16 cm, 21 cm tuning disc approx. 24 cm. Example: approx. 24 instead of approx. 16 cm cutting width. How much mowing time your robot actually saves depends on your garden, navigation and settings.

Effective cutting width by disc size

  • Original, e.g. Gardena Sileno City (disc approx. 14.5 cm)approx. 16 cm
  • 14.5 cm discapprox. 18 cm+13%
  • 17 cm discapprox. 20 cm+25%
  • 19 cm discapprox. 22 cm+38%
  • 21 cm discapprox. 24 cm+50%

Approximate values. The actual cutting width depends on the mower and the installation.

Compatibility check

Will it fit your mower?

Choose brand and model. You will see right away which disc fits and what to look out for when mounting it.
1Choose brand

Other brands, check the mount yourself

Choose brand

Benefits

Thought through down to the last screw

  • Wider cut, less trimming

    The tuning disc widens the cut considerably. The result: neatly mown edges and noticeably less touch-up work.

  • Choose your size

    14.5, 17, 19 or 21 cm discs for approx. 18, 20, 22 or 24 cm effective cutting width, each with a round or hex mount.

  • Up to 9 blades instead of 3

    Finer mulching and a more even cut without clumps, for a denser lawn.

  • Ready to use

    The brass threaded inserts are already fitted. Screw on the blades with the included M4 screws and you are done.

  • Balanced

    Evenly spaced blade positions for quiet, low-vibration running.

  • Stainless steel blades

    Rust-resistant and sharp. Fastened with M4 screws in brass threaded inserts.

  • Weatherproof

    Tough engineering plastic, UV-stabilised, in timeless black.

  • Discs made in Germany

    Every disc is made to order in Gronau and shipped no later than the working day after payment.

Sizes and options

The right disc for your lawn

Every size is available without blades, with pre-mounted blades or pre-mounted as a set with replacement blades. Standard discs have 6 blades, Premium discs 8 or 9.
  • 14.5 cm disc

    approx. 18 cm cutting width

    • 6 bladesStandard

    Round or hex mount

    from €19.90

    In accordance with Section 19 UStG, no VAT is charged. plus shipping

  • 17 cm disc

    approx. 20 cm cutting width

    • 6 bladesStandard
    • 8 bladesPremium

    Round or hex mount

    from €20.90

    In accordance with Section 19 UStG, no VAT is charged. plus shipping

  • 19 cm disc

    approx. 22 cm cutting width

    • 6 bladesStandard
    • 9 bladesPremium

    Round or hex mount

    from €21.90

    In accordance with Section 19 UStG, no VAT is charged. plus shipping

  • 21 cm disc

    approx. 24 cm cutting width

    • 6 bladesStandard
    • 9 bladesPremium

    Round or hex mount

    from €22.90

    In accordance with Section 19 UStG, no VAT is charged. plus shipping

With a round mount or a hex mount (Worx Landroid). Discs with blades shown to scale (3D rendering from the design data).

Quantity discount10% off from 2 discs15% off from 3 discs20% off from 4 discs

Installation

Installation made easy

Safety first

Switch the mower off and secure it against being switched on. Wear protective gloves, the blades are sharp. Keep children and pets away.

  1. 1

    Check the blade guard

    On many models the original blade guard (blade cover) is in the way of the larger disc. It protects against contact with the blades. Whether you remove it is your decision; if you do, follow the safety notes in the installation guide.

  2. 2

    Mount the disc

    Attach the tuning disc with your mower's standard fixing, on the round mount with the 3 standard screws. No special tools needed.

  3. 3

    Screw on the blades

    Screw the blades into the brass threaded inserts with the included M4 screws. With pre-mounted blades, skip this step.

  4. 4

    Check clearance

    Make sure the disc runs freely at your cutting height and adjust the splash guard if necessary. Then do a short test run.

Discs made in Germany

Made to order in Gronau

Every disc is only made once you order it: from tough, UV-stabilised engineering plastic, with brass threaded inserts already fitted. No warehouse stock, no long journeys. The blades are bought in. And you get a real person to talk to instead of a hotline.

working day until dispatch, at the latest
1
days right of withdrawal
14
blades on Premium options
9
Close-up of the disc back with brass threaded inserts and the three fixing holes (AI-edited)

Reviews

What customers say

17 selected reviews from earlier sales
PositiveEarlier sale

Die Drehung der Messerscheibe erzeugt ein gleichmäßiges surren aber das war zu erwarten. Die Messer sind jetzt beim Schneiden erheblich laufruhiger als vorher mit der originalen Platte. Bin auf die Haltbarkeit gespannt.

rai…Purchase via online marketplace

PositiveEarlier sale

Super schnelle Lieferung. Schnittbild ist top. Den Teller hört man etwas lauter drehen, dafür ist das Schnittgeräusch leiser. Kann ich aber empfehlen da auch weiter bis zum Rand geschnitten wird.

pai…Purchase via online marketplace

PositiveEarlier sale

Superschneller Versand, netter Kontakt, Ware wie beschrieben und voll funktionsfähig. Ein super Upgrade für den Mähroboter. Jederzeit gerne wieder !!!

sbf…Purchase via online marketplace

How we check reviews: only customers can review in the shop, via a personal link they receive by email after their order. We publish these reviews whether positive or negative and only remove unlawful or offensive content. Reviews from earlier sales on an online marketplace are shown as a selection; they come from buyers there with a confirmed purchase.

FAQ

Good to know

Will the tuning blade disc fit my robotic mower?

The round mount fits mowers with a round motor mount and 22 mm hole spacing, for example Gardena Sileno City, Sileno Life and Smart Sileno. For Worx Landroid from 2020 (for example M500, M700, M1000) there is the hex mount in the 14.5 cm disc.

For Husqvarna Automower, McCulloch, Flymo, Kress, LandXcape, Ferrex, Scheppach and Einhell, please compare the mount with the reference photos and measure the hole spacing before buying. The quickest way is the compatibility check.

Which disc size should I choose?

With the round mount the discs come in 14.5, 17, 19 and 21 cm diameter. That gives roughly 18, 20, 22 and 24 cm effective cutting width. With the hex mount (Worx Landroid) there is only the 14.5 cm disc, because the disc sits off-centre there.

First measure the cutting width your mower has today. Then check under the housing whether a disc with the effective cutting width you want would run freely there, also at your cutting height.

Do I have to remove the blade guard?

On most compatible models, yes: the original blade guard (blade cover) has to be removed, otherwise the disc rubs against it. After mounting, make sure the disc runs freely at your cutting height. On some models the splash guard may need adjusting.

How long does shipping take?

Every disc is made to order and dispatched no later than the working day after payment. Within Germany, shipping by large letter is free and includes basic tracking; under German postal law, letters are usually delivered within three working days. A tracked DHL parcel, which can also go to a DHL parcel locker (Packstation), costs €2.99.

Do you ship abroad?

Yes, to all countries of the European Union. Shipping as an international large letter is free, includes basic tracking and usually takes 3–5 working days after dispatch. We currently do not ship outside the EU.

Can I get an invoice?

Yes. Anyone can request an invoice from us, private customers and businesses alike. Simply send us an email with your order number and you will receive the invoice as a PDF by email. Businesses, please tell us the company name and address to be shown on the invoice.

Is there a guarantee on the tuning blade disc?

Yes. In addition to your statutory rights, we give a 1-year durability guarantee from delivery on the tuning blade disc including mount and brass threaded inserts. If the disc breaks or a threaded insert comes loose under normal use, we replace it free of charge. Just send us an email with your order number and a photo.

Blades and screws are wear parts and are excluded, as is damage caused by stones or other foreign objects, accidents and incorrect installation.

Your statutory warranty rights (2 years from delivery for consumers) apply independently and are not restricted by this guarantee.

How much wider does the tuning blade disc cut?

On the Gardena Sileno City the original disc is about 14.5 cm across with about 16 cm effective cutting width. With the tuning blade disc it is about 18, 20, 22 or 24 cm, depending on the size. The mower cuts closer to edges and beds, leaving less for the trimmer.

How far you can go depends on the space under your mower's housing. Before buying, check that the disc runs freely at your cutting height.

Ready for clean edges?

Find out in a few clicks which disc fits your robotic mower.

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