Professional-Grade Flail Mower Gearbox — Trusted by Farmers Across Australia
Productive grass cutting starts with dependable power transmission. The Flail Mower gearbox we manufacture is a precision instrument — not a commodity part. Sitting atop the mower deck, the flail mower gearbox transfers PTO power to a horizontal rotor studded with swinging flail blades. The gear reduction delivers high rotor tip speed for clean cutting of grass, brush, and light woody material.
Von den gehärteten Zahnrädern bis zu den hochbelastbaren Wellendichtungen – jedes Bauteil ist sorgfältig ausgewählt und montiert, um tausende Stunden störungsfreien Betrieb zu gewährleisten. Australische Landwirte, die unter staubigen, heißen, schlammigen und feuchten Bedingungen arbeiten, verlassen sich auf dieses Getriebe, um auch in den anspruchsvollsten Jahreszeiten zuverlässig Leistung zu erbringen.
🛠 Flail Mower Gearbox Specifications at a Glance
Key performance data for our agricultural gearbox for flail mower. Need different specs? We manufacture to your exact requirements.
Gear & Ratio Data
| Maximum Continuous Torque |
140 – 500 Nm |
Peak torque: 150% of continuous |
| Ausgangsdrehzahlbereich |
146 – 2447 RPM |
Hängt vom gewählten Verhältnis ab |
| Paint System |
2-coat industrial |
Stainless option for corrosive env. |
| Maximales Eingangsdrehmoment |
800 Nm |
Mit Überlastschutz |
| Qualitätszertifizierung |
ISO 9001:2015 |
Verfügbare Prüfberichte |
Power & Torque Ratings
| Noise at 1m Distance |
≤ 75 dB(A) |
Low-noise profiles optional |
| Primary Bearings |
Needle Roller Bearings |
Premium bearing upgrades |
| Nettogewicht |
14 kg |
Variiert je nach Konfiguration |
| Eingangswellenverzahnung |
6-Zahn (1-3/8″) / 21-Zahn (1-3/4″) |
20-Zahn-Ausführung, 8-Zahn-Ausführung auf Anfrage |
| Output Shaft Type |
Flanged output |
Custom output configurations |
Construction & Materials
| Centre Distance |
110 mm |
Per gear ratio |
| Ölkapazität |
3.0 litres |
Übergroßer Sumpf verfügbar |
| Gear Face Width |
25 mm |
Wider for high-torque |
| Eingangswellendurchmesser |
40 mm |
Sonderdurchmesser |
| Primärgetriebetyp |
Herringbone Gears |
Individuelle Zahnprofile auf Anfrage |
Sealing, Lubrication & Environment
| Ablassschraubentyp |
Quick-drain valve |
Option für den Probenahmeanschluss |
| Schmierverfahren |
Mist lubrication |
Zwangsschmierung für hohe Belastungszyklen |
| Umgebungstemperaturbereich |
-30°C to +105°C |
Arktische / tropische Varianten |
| Designstandard |
ISO 6336 + FEA-verifiziert |
Zertifizierung durch Dritte |
| Entlüftungsventil |
Screw-in breather cap |
Allwettertypen |
Kontaktieren Sie uns Ingenieurteam for a detailed specification sheet tailored to your flail mower model and grass cutting conditions.
✅ Our Flail Mower Gearbox vs Budget Alternatives
Investing in a quality gearbox is the smartest upgrade you can make to your flail mower. Here is the evidence:
| Attribute |
Standard Replacement |
Our Premium-Grade Flail Mower Gearbox |
| Ersatzteile |
Teilekatalog nicht verfügbar |
Komplette Überholungssätze ab Lager |
| Betriebseffizienz |
88-92% — merklicher Temperaturanstieg während des Betriebs |
96-98% — minimal heat generation, lower fuel costs |
| Dichtungssystem |
Paper gaskets and basic lip seals |
Triple-barrier seal: spring-loaded lip + V-ring + external slinger |
| Wohnungsbau-Design |
Geschweißte Stahlkonstruktion, Maßabweichungen |
Precision die-cast housing, vacuum-impregnated to eliminate micro-porosity |
| Gear Material & Treatment |
Grey iron gears, no heat treatment |
18CrNiMo7-6 aerospace-grade steel, shot-peened root fillets for fatigue life |
| Oberflächenschutz |
No primer — surface rust within weeks |
Kathodische Elektrotauchlackierung + Pulverbeschichtung, 1000-Stunden-Salzsprühtest |
Farmers who switch to our Flail Mower gearbox report that the investment pays for itself within the first season through eliminated downtime and reduced maintenance. Quality is an investment, not an expense.
🔧 Power Pathway: How Your Flail Mower Gearbox Works
Unser Flail Mower agricultural gearbox is a specialized power transmission unit for grass cutting:
▶ PTO Power Input
Power enters through a precision-machined splined coupling accepting 540 RPM (1-3/8″) or 1000 RPM (1-3/4″) PTO output. The input shaft rides on spherical roller bearings selected specifically for the load profile of grass cutting applications.
▶ Gear Reduction & Torque Multiplication
The gear train employs precision-matched herringbone gears manufactured from carburized alloy steel. The profile is FEA-optimized to distribute contact stress across the full tooth face. Sitting atop the mower deck, the flail mower gearbox transfers PTO power to a horizontal rotor studded with swinging flail blades. The gear reduction delivers high rotor tip speed for clean cutting of grass, brush, and light woody material. Typical mechanical efficiency exceeds 96%.
▶ Output to Flail Rotor
The transformed power exits through the output shaft to the flail mower’s working mechanism, specifically driving the flail rotor for core grass cutting function. The output connection is engineered for vibration-free, backlash-free transmission at the point of work.
▶ Lubrication & Protection
The die-cast aluminum housing acts as a heat sink with cooling fins for convective cooling. Internal splash lubrication with SAE 80W-90 GL-5 ensures all surfaces maintain a protective oil film. Quad-Ring Seals at each shaft opening block contaminants while retaining lubricant.
🔁 Direct Interchange — Flail Mower Gearbox Compatibility
All manufacturer names and model numbers below are property of their respective owners, cited for cross-reference only. No affiliation or endorsement is implied.
Confirmed compatible flail mower models by manufacturer:
Manitou — G2.6, J-338, Mk-II ✅ Verified
Bobcat — 814Z, G5.8, Series 548 ✅ Verified
Mitsubishi — Model 9206, G-652, G3.0 ✅ Verified
Deutz-Fahr — 497S, Series 560, Model 6566 ✅ Verified
Landini — Type 38D, C-771, G5.5 ✅ Verified
Valtra — 886X, Series 693, Type 20H ✅ Verified
Rebuild Kits & Parts
⚙ Bearings
🔒 Seals
⚙ Gears
🔧 Shafts
🎯 Flail Mower Gearbox Sizing Guide — Get the Right Fit First Time
Getting the right gearbox for your mowing implement requires confirming these seven parameters before you order. Our engineering team can help you through each step if needed.
1. Rotation Direction
Determine whether the flail rotor on your flail mower requires clockwise or counter-clockwise output when viewed from the drive end.
Importance: Incorrect rotation direction will damage the implement or produce no useful work.
2. Existing Gearbox Identification
Record the brand, model number, and any part numbers from the nameplate of the gearbox being replaced.
Importance: Speeds up the matching process and ensures dimensional compatibility with your mowing implement.
3. Output Shaft Type
Identify the coupling type on your flail mower — keyed, splined, flanged, or hollow bore.
Importance: Mismatched outputs require costly adapter couplings and introduce potential failure points.
4. Mounting Bolt Pattern
Measure the bolt hole positions, centre distances, and overall envelope on your flail mower’s gearbox mounting flange.
Importance: Ensures direct bolt-on installation without any fabrication or adapter plates.
5. Torque Demand
Calculate the peak torque your grass cutting application generates — including shock loads from obstacles or material variations.
Importance: The gearbox must handle peak torque without activating overload protection during normal operation.
6. Tractor PTO Speed
Check your tractor’s PTO specification — standard is 540 RPM or 1000 RPM.
Importance: Determines the input shaft spline size and the baseline for ratio calculation.
7. Required flail rotor Speed
Refer to your flail mower manufacturer’s manual for the recommended flail rotor operating speed.
Importance: Together with PTO speed, this defines the exact gear ratio your gearbox needs.
💡 Profi-Tipp: Ordering tip: if replacing an existing gearbox, measure the input/output shaft diameters and mounting bolt pattern as a minimum. With these three dimensions, our team can match the correct unit from our catalogue or design a custom solution.
🔧 Technician’s Installation Manual — Flail Mower Gearbox
Follow these instructions for a successful installation of your new Flail Mower gearbox. Correct installation is critical for achieving maximum service life and warranty coverage.
Step 1: Drain & Document Old Gearbox
Suchen Sie die Ablassschraube am vorhandenen Getriebe und stellen Sie einen Auffangbehälter darunter. Entfernen Sie die Ablassschraube und lassen Sie das gesamte Öl ablaufen. Prüfen Sie das Öl auf Metallpartikel oder Verfärbungen, die auf inneren Verschleiß hindeuten könnten. Notieren Sie sich die Modellnummer des alten Getriebes, die Größe der Befestigungsschrauben und die Wellenabmessungen.
Step 2: Fill With Lubricant
Entfernen Sie die Einfüllschraube und füllen Sie langsam das empfohlene Getriebeöl bis zur Markierung ein. Verwenden Sie die in der Getriebedokumentation angegebene Viskositätsklasse (üblicherweise SAE 80W-90 GL-5 oder gleichwertig). Setzen Sie die Einfüllschraube wieder ein und ziehen Sie sie handfest, anschließend mit einem Schraubenschlüssel fest. Stellen Sie sicher, dass die Entlüftungskappe sauber und frei ist.
Step 3: Prepare the Mounting Surface
Clean the mounting flange on the flail mower frame with a wire brush and solvent, removing all old sealant, rust, and debris. Inspect the mounting surface for cracks, stripped threads, or warping. Chase any damaged bolt threads with a tap. Apply a thin film of anti-seize compound to the mounting face if specified.
Step 4: Connect Output to flail rotor
Attach the gearbox output shaft to the flail mower’s flail rotor drive coupling. For keyed connections, align the keyway and slide the coupling on, then secure with the retaining bolt and torque to specification. For splined outputs, apply anti-seize to the splines and verify full engagement before locking.
Step 5: Safety Preparation
Park the tractor on firm, level ground. Engage the parking brake and place wheel chocks. Turn off the engine and remove the key. Disconnect the PTO shaft from the flail mower. Allow all components to cool completely before touching. Wear appropriate PPE including gloves and safety glasses.
Step 6: Remove Old Gearbox
Trennen Sie den Nebenantrieb von der Getriebeeingangswelle. Stützen Sie das Getriebegewicht mit einem Wagenheber oder einer Hebebühne ab (typisches Gewicht: 15–70 kg, je nach Modell). Lösen Sie alle Befestigungsschrauben über Kreuz, um die Klemmspannung gleichmäßig zu verteilen. Senken Sie das alte Getriebe vorsichtig ab und stellen Sie es beiseite.
Step 7: Test Run & Break-In
Starten Sie den Traktor und schalten Sie die Zapfwelle bei niedriger Drehzahl (ca. 300 U/min) ein. Achten Sie genau auf mahlende, heulende, klopfende oder klickende Geräusche. Lassen Sie den Traktor 15–20 Minuten mit niedriger Drehzahl laufen und überwachen Sie dabei vorsichtig die Temperatur des Getriebegehäuses von Hand. Prüfen Sie alle Dichtungen und die Befestigungspunkte auf Öllecks. Erhöhen Sie die Drehzahl allmählich auf volle Betriebsdrehzahl.
⚠ Wichtig: Always consult the specific installation manual shipped with your Flail Mower gearbox for model-specific torque values and procedures.
🚧 Symptom-Cause-Fix Guide for Your Flail Mower Gearbox
Use this diagnostic reference to identify and resolve common Flail Mower gearbox issues in the field. Most problems can be diagnosed and addressed without removing the gearbox from the flail mower.
⚠ Gearbox Produces a Metallic Clunking Sound on PTO Engagement
Probable Cause: Overload protection mechanism is loose
Recommended Action: A clunking sound specifically on PTO engagement (but not during operation) usually indicates driveline lash — check driveline telescoping tube for wear. If the clunk occurs during operation, it may indicate excessive gear backlash from internal wear. Have the gearbox inspected if the sound is progressive.
⚠ Ungewöhnliche mahlende oder heulende Geräusche
Probable Cause: Foreign object trapped in gear mesh
Recommended Action: Drain and inspect oil for metal particles. Refill with correct grade. If noise persists after oil change, bearing or gear inspection is required. Contact support for rebuild guidance.
⚠ Output Shaft Stops Turning While Input Rotates
Probable Cause: Internal shaft fracture
Recommended Action: Check the overload protection device first — this is the most likely cause if the gearbox was recently subjected to a sudden overload. Replace the shear bolt or reset the slip clutch per the manual. If overload protection is intact, the gearbox has internal damage and requires professional service.
⚠ Übermäßige Vibrationen während des Betriebs
Probable Cause: Unbalanced flail rotor or damaged output coupling
Recommended Action: First check all mounting bolt torques — vibration frequently loosens fasteners, which then amplifies the vibration. Next, inspect the PTO driveline U-joints for wear or binding. Verify driveline angles are within specification. Finally, check the output coupling to the flail rotor for wear or damage.
⚠ Getriebe läuft übermäßig heiß
Probable Cause: Incorrect oil grade (too thick or too thin for conditions)
Recommended Action: Check oil level and grade against the specification. Clean all debris from the housing exterior — especially the cooling fins. If the flail mower is being operated at or above the gearbox’s rated power, reduce forward speed or PTO load. Consider upgrading to synthetic gear oil for improved thermal performance.
If any issue cannot be resolved with the actions above, contact our technical support team for expert diagnosis. We can arrange remote troubleshooting or dispatch a replacement unit for critical breakdown situations.
📝 From the Field: Australian Farmers Review the Flail Mower Gearbox
Our agricultural gearboxes are field-proven across every Australian state and territory. Below are documented case studies from recent Flail Mower gearbox installations.
📍 Case #1: Mackay, QLD
| Kunde: |
Derek Whitfield — commercial grass cutting contractor |
| Standort: |
Mackay, QLD |
| Betriebsgröße: |
3500 acres |
| Anwendung: |
Flail Mower gearbox for flail mower — grass cutting |
| Kaufgrund: |
Replace failed OEM gearbox to restore flail mower for the upcoming season |
“Our flail mower operates in extremely dusty conditions and we were going through gearboxes every season. This one has survived 4 seasons and is still running perfectly. The sealing is clearly superior to what we had before.”
— Derek Whitfield, Mackay, QLD
Jack Thornton — Mildura, VIC
Betrieb: cooperative farming group | Größe: 1000 acres | Verwenden: Flail Mower gearbox for grass cutting
Kaufgrund: Notfallmäßiger Austausch mitten in der Saison nach katastrophalem Getriebeausfall
„Qualität vergleichbar mit europäischen Originalteilen zum halben Preis. Die Verarbeitung ist sauber, der Lack haltbar und die Zahnräder laufen spürbar geschmeidiger als das chinesische Gerät, das es ersetzt hat. Habe es bereits drei anderen Landwirten empfohlen.“
📍 Griffith, NSW commercial grass cutting contractor — 8000 acres
Kunde: Luke Anderson | Anwendung: Flail Mower gearbox — grass cutting
Zweck: Neuanlagenbau – Verwendung eines Nachrüstgetriebes als OEM-Verbesserung
“We stress-test our equipment in ways that would void most warranties. This gearbox has handled everything we’ve thrown at it — continuous 12-hour shifts — without complaint.”
📍 Case #4: Hamilton, VIC
| Kunde: |
Terry Voss — broadacre cropping operation |
| Standort: |
Hamilton, VIC |
| Betriebsgröße: |
1000 acres |
| Anwendung: |
Flail Mower gearbox for flail mower — grass cutting |
| Kaufgrund: |
Retrofit older model flail mower with improved gearbox for extended service life |
“The oil-tight sealing on this gearbox is remarkable. After 1611 hours of operation in muddy conditions, the oil comes out clean at service time. Previous gearboxes always had contaminated oil by the first oil change.”
— Terry Voss, Hamilton, VIC
Ed Pearce — Melbourne, VIC
Betrieb: intensive horticultural farm | Größe: 4000 acres | Verwenden: Flail Mower gearbox for grass cutting
Kaufgrund: Upgrade von einem günstigen Nachrüstgerät, das weniger als eine Saison hielt.
“The custom ratio option was a game-changer for our operation. We needed a non-standard output speed that no other supplier could provide. The engineering team designed a solution within a week and it worked perfectly from day one.”
❓ Flail Mower Gearbox FAQ — Everything You Need to Know
🔹 Do you provide technical support after purchase?
Ja – jeder Kauf beinhaltet den Zugang zu unserem technischen Support-Team für Installationsanleitungen, Fehlerbehebung, Wartungshinweise und Ersatzteilbestellungen. Sie erreichen uns telefonisch, per E-Mail und über unser Online-Kontaktformular. Der technische Support ist während und nach der Garantiezeit kostenlos.
🔹 What documentation ships with the gearbox?
Jedes Getriebe wird mit folgendem Lieferumfang geliefert: Montageanleitung mit Drehmomentangaben, Schmier- und Wartungsplan, Teilezeichnung mit Einzelteilenummern, Garantieschein und Qualitätsprüfzertifikat mit Seriennummer und Testergebnissen.
🔹 Can this gearbox withstand the shock loads generated during grass cutting?
The gearbox is specifically designed for the dynamic and impact loading characteristic of grass cutting applications. Case-hardened alloy steel gears absorb repetitive shocks, while the optional overload protection (shear bolt or slip clutch) safeguards against catastrophic overload events. The bearing selection and housing rigidity are both matched to flail mower load profiles.
🔹 What does the warranty cover and for how long?
Our 24-month comprehensive warranty covers all defects in materials and workmanship, including bearings, gears, seals, and housing. It applies from the date of purchase and is backed by our ISO-certified quality management system. Extended warranty programs are available for bulk and fleet orders.
🔹 Which gear oil do you recommend for Australian conditions?
Für die meisten australischen Klimazonen ist SAE 80W-90 EP-Getriebeöl gemäß GL-5-Spezifikation ideal. In tropischen Regionen mit anhaltend hohen Temperaturen empfehlen wir 85W-140. Für südliche Regionen mit kalten Wintern bietet synthetisches 75W-90 einen besseren Kaltstartschutz. Die endgültige Empfehlung finden Sie auf dem mit Ihrem Getriebe gelieferten Öldatenblatt.
🔹 Can I return a gearbox if it does not fit my flail mower?
Wenn Sie uns vor der Bestellung Ihre Gerätedaten mitteilen und wir die Kompatibilität bestätigen, ist der Einbau garantiert. Sollte es ausnahmsweise zu Kompatibilitätsproblemen kommen, bieten wir Ihnen innerhalb von 30 Tagen nach Lieferung einen unkomplizierten Umtausch oder eine Rückerstattung für unbenutzte Getriebe an. Unser Ziel ist es, Ihnen bereits bei der ersten Bestellung das passende Getriebe zu liefern.
🔹 Is the gearbox suitable for use in organic-certified farming operations?
Our gearboxes are mechanical components and contain no substances that would affect organic certification. However, the choice of lubricant should be considered — we can recommend food-grade and biodegradable gear oils that are compatible with organic farming standards in Australia and internationally.
🔹 Can the gearbox be serviced or rebuilt in the field?
Regelmäßige Wartungsarbeiten (Ölwechsel, Dichtungsaustausch, Lagerprüfung) können vor Ort mit Standardwerkzeugen durchgeführt werden. Für umfassende Überholungen liefern wir komplette Überholungssätze mit allen Lagern, Dichtungen und Dichtungsringen. Ausführliche Servicehandbücher und Videoanleitungen stehen in unserem Supportportal zum Download bereit.
🔹 What payment and ordering options do you offer?
We accept bank transfer, credit card, and purchase orders from established accounts. For large orders, we offer 30-day payment terms subject to credit approval. Orders can be placed through our website, by email, or by phone. Pro-forma invoices are available for pre-payment arrangements.
🔹 Can the output shaft be customized for my specific flail mower?
Absolutely. We manufacture gearboxes with keyed, splined, flanged, hex, and hollow-bore output shaft configurations. If your flail mower requires a non-standard output size, spline count, or connection type, our engineering team will design and machine it to your exact specifications at no additional lead time for common modifications.
⚙ Build a Reliable Grass Cutting Powertrain
These products are frequently purchased alongside our Flail Mower gearbox by Australian farmers optimizing their grass cutting equipment.
PTO Drive Shaft for Flail Mower
Rugged PTO drive shafts built for grass cutting demands. Standard, wide-angle, and CV joint options. Telescoping tube with nylon liner. Full guard kit included.
View PTO Shafts →
Explore Our Gearbox Range
Multi-machine operators benefit from our comprehensive gearbox catalogue — standardised quality, consolidated shipping, and volume pricing across the full range.
Browse Gearboxes →
⚖ Safety Standards for Flail Mower Equipment in Australia
Operating flail mower equipment in Australia requires compliance with federal and state workplace health and safety legislation. Key requirements for Flail Mower gearbox installations include:
Standards Compliance
| Standard |
Relevance |
| AS/NZS ISO 9001:2015 — Quality Management |
Our manufacturing facility holds current certification to the international quality management standard. |
| AS 1636 — Agricultural Machinery Safety |
Our gearboxes meet design requirements for agricultural machinery components, including rotating part guarding interfaces. |
| Safe Work Australia PTO Safety Guidelines |
All PTO-driven flail mower equipment must incorporate compliant shaft guarding. Guard-compatible drivelines available. |
State-Level WHS Requirements
- Northern Territory — WHS (National Uniform Legislation) Regulations 2011: applies federal standards to grass cutting operations territory-wide.
- South Australia — WHS Regulations 2012: Erfordert regelmäßige Inspektionen aller Maschinen mit rotierenden Antriebskomponenten.
- Tasmania — WHS Regulations 2012: mandates operator training for all PTO-driven flail mower equipment.
Regional Coverage & Delivery Network
Wir liefern Flail Mower agricultural gearboxes to every state and territory in Australia. Our logistics network covers major farming regions including the North West Slopes, Hunter Valley, and Central West NSW, the Barossa Valley, the Riverland, and South East SA, and the Riverina, the Murrumbidgee Irrigation Area, and the Liverpool Plains. Whether you operate in a metropolitan fringe area or a remote pastoral station, we ship directly to your property with full tracking and delivery confirmation.
🎯 Your Flail Mower Gearbox Journey Starts Here
With over two decades of experience and 150,000+ gearboxes produced each year, we are one of the most established agricultural gearbox manufacturers serving the Australian market. Our production capabilities include: cmm (coordinate measuring machine) dimensional inspection, precision cnc gear cutting and grinding with sub-micron repeatability, iso 9001:2015 certified quality management with full batch traceability, and much more.
Standard & Custom — We Build Both
Standard specifications don’t always fit. Our engineering team designs and manufactures custom gearboxes to your drawings, samples, or specifications. From modified OEM replacements to completely new designs for specialised flail mower equipment — we handle it all.
Drawings, samples, dimensions, photos — whatever you have, send it. We will engineer the rest.
🏭 Discover Our Full Capabilities →
Ihr zuverlässiger Partner für Getriebelösungen in der Landwirtschaft – Standard- und Sonderanfertigungen – in ganz Australien und weltweit.
