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.
From the hardened gear teeth to the heavy-duty shaft seals, every element is selected and assembled to deliver thousands of hours of trouble-free service. Australian farmers operating in dust, heat, mud, and moisture rely on this gearbox to perform consistently throughout the most demanding seasons.
🛠 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
| أقصى عزم دوران مستمر |
140 – 500 Nm |
عزم الدوران الأقصى: 150% مستمر |
| Output Speed Range |
146 – 2447 RPM |
Depends on selected ratio |
| Paint System |
2-coat industrial |
Stainless option for corrosive env. |
| أقصى عزم دوران للإدخال |
800 Nm |
مزود بحماية من الحمل الزائد |
| شهادة الجودة |
ISO 9001:2015 |
تقارير التدقيق متاحة |
Power & Torque Ratings
| Noise at 1m Distance |
≤ 75 dB(A) |
Low-noise profiles optional |
| المحامل الرئيسية |
Needle Roller Bearings |
ترقيات محامل ممتازة |
| Net Weight |
14 kg |
Varies by configuration |
| تشعب عمود الإدخال |
6-spline (1-3/8 بوصة) / 21-spline (1-3/4 بوصة) |
20 شريحة، 8 شرائح حسب الطلب |
| نوع عمود الإخراج |
Flanged output |
تكوينات الإخراج المخصصة |
Construction & Materials
| Centre Distance |
110 mm |
Per gear ratio |
| سعة الزيت |
3.0 litres |
يتوفر حوض تصريف كبير الحجم |
| Gear Face Width |
25 مم |
Wider for high-torque |
| قطر عمود الإدخال |
40 mm |
أقطار مخصصة |
| نوع التروس الأساسي |
Herringbone Gears |
تصميمات أسنان مخصصة حسب الطلب |
Sealing, Lubrication & Environment
| نوع سدادة التصريف |
صمام تصريف سريع |
خيار منفذ أخذ العينات |
| Lubrication Method |
Mist lubrication |
Forced lube for high-duty cycles |
| Ambient Temperature Range |
-30°C to +105°C |
Arctic / tropical variants |
| معيار التصميم |
ISO 6336 + FEA verified |
معتمد من طرف ثالث |
| فتحة تهوية / منفذ تنفس |
Screw-in breather cap |
أنواع مناسبة لجميع الأحوال الجوية |
اتصل بنا فريق الهندسة 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 |
| قطع غيار |
Parts catalogue unavailable |
Complete rebuild kits off-the-shelf |
| الكفاءة التشغيلية |
88-92% — noticeable temperature rise during operation |
96-98% — minimal heat generation, lower fuel costs |
| Sealing System |
Paper gaskets and basic lip seals |
Triple-barrier seal: spring-loaded lip + V-ring + external slinger |
| تصميم المساكن |
Welded steel fabrication, dimensional inconsistency |
Precision die-cast housing, vacuum-impregnated to eliminate micro-porosity |
| مواد ومعالجات التروس |
Grey iron gears, no heat treatment |
18CrNiMo7-6 aerospace-grade steel, shot-peened root fillets for fatigue life |
| حماية السطح |
No primer — surface rust within weeks |
طلاء إلكتروني كاثودي + طلاء مسحوقي، اختبار رش الملح لمدة 1000 ساعة |
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
ملكنا 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
جميع أسماء الشركات المصنعة وأرقام الطرازات المذكورة أدناه هي ملك لأصحابها المعنيين، وقد تم ذكرها لأغراض مرجعية فقط. ولا يُقصد بها أي انتماء أو تأييد.
Confirmed compatible flail mower models by manufacturer:
Manitou — G2.6, J-338, Mk-II ✅ تم التحقق منه
Bobcat — 814Z, G5.8, Series 548 ✅ تم التحقق منه
Mitsubishi — Model 9206, G-652, G3.0 ✅ تم التحقق منه
Deutz-Fahr — 497S, Series 560, Model 6566 ✅ تم التحقق منه
Landini — Type 38D, C-771, G5.5 ✅ تم التحقق منه
Valtra — 886X, Series 693, Type 20H ✅ تم التحقق منه
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.
💡 نصيحة احترافية: 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
Locate the drain plug on the existing gearbox and position a catch container underneath. Remove the drain plug and allow all oil to drain completely — inspect the oil for metal particles or discolouration that may indicate internal wear. Record the old gearbox model number, mounting bolt size, and shaft dimensions for reference.
Step 2: Fill With Lubricant
Remove the fill plug and slowly add the recommended gear oil until it reaches the level indicator. Use the lubricant grade specified in the gearbox documentation (typically SAE 80W-90 GL-5 or equivalent). Replace the fill plug and hand-tighten, then snug with a wrench. Verify the breather cap is clean and unobstructed.
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
Disconnect the PTO driveline from the gearbox input shaft. Support the gearbox weight with a floor jack or overhead hoist (typical weight: 15-70 kg depending on model). Remove all mounting bolts in a criss-cross pattern to relieve clamping stress evenly. Carefully lower the old gearbox and set it aside.
Step 7: Test Run & Break-In
Start the tractor and engage the PTO at low RPM (approximately 300 RPM). Listen carefully for any grinding, whining, knocking, or clicking sounds. Run at low speed for 15-20 minutes, monitoring the gearbox housing temperature by hand (carefully). Check for oil leaks at all seals and the mounting interface. Gradually increase to full operating speed.
⚠ هام: 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.
⚠ يصدر صندوق التروس صوت طقطقة معدنية عند تشغيل وحدة نقل الحركة
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.
⚠ صوت طحن أو أزيز غير طبيعي
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.
⚠ Excessive Vibration During Operation
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.
⚠ علبة التروس تعمل بدرجة حرارة عالية للغاية
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
| عميل: |
Derek Whitfield — commercial grass cutting contractor |
| موقع: |
Mackay, QLD |
| حجم المزرعة: |
3500 acres |
| طلب: |
Flail Mower gearbox for flail mower — grass cutting |
| سبب الشراء: |
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
عملية: cooperative farming group | مقاس: 1000 acres | يستخدم: Flail Mower gearbox for grass cutting
سبب الشراء: استبدال طارئ في منتصف الموسم بعد عطل كارثي في علبة التروس الأصلية
“Quality comparable to European OEM units at half the price point. The machining is clean, the paint is durable, and the gears are noticeably smoother than the Chinese-made unit it replaced. Recommended to three other farmers already.”
📍 Griffith, NSW commercial grass cutting contractor — 8000 acres
عميل: Luke Anderson | طلب: Flail Mower gearbox — grass cutting
غاية: بناء معدات جديدة - تحديد علبة تروس ما بعد البيع كتحسين من الشركة المصنعة الأصلية
“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
| عميل: |
Terry Voss — broadacre cropping operation |
| موقع: |
Hamilton, VIC |
| حجم المزرعة: |
1000 acres |
| طلب: |
Flail Mower gearbox for flail mower — grass cutting |
| سبب الشراء: |
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
عملية: intensive horticultural farm | مقاس: 4000 acres | يستخدم: Flail Mower gearbox for grass cutting
سبب الشراء: Upgrade from budget aftermarket unit that lasted less than one season
"كان خيار النسبة المخصصة بمثابة نقلة نوعية لعملياتنا. كنا بحاجة إلى سرعة إنتاج غير قياسية لم يستطع أي مورد آخر توفيرها. قام الفريق الهندسي بتصميم حل في غضون أسبوع، وقد عمل بشكل مثالي منذ اليوم الأول."
❓ Flail Mower Gearbox FAQ — Everything You Need to Know
🔹 Do you provide technical support after purchase?
نعم، يشمل كل شراء إمكانية الوصول إلى فريق الدعم الهندسي لدينا للحصول على إرشادات التركيب، وحل المشكلات، ونصائح الصيانة، وطلب قطع الغيار. يتوفر الدعم عبر الهاتف والبريد الإلكتروني ونموذج الاتصال الإلكتروني الخاص بنا. الدعم الفني مجاني خلال فترة الضمان أو بعدها.
🔹 What documentation ships with the gearbox?
تأتي كل علبة تروس مزودة بما يلي: دليل التركيب مع مواصفات عزم الدوران، وجدول التشحيم والصيانة، ومخطط الأجزاء مع أرقام الأجزاء الفردية، وبطاقة تسجيل الضمان، وشهادة فحص الجودة مع الرقم التسلسلي للوحدة ونتائج الاختبار.
🔹 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?
For most Australian climates, SAE 80W-90 EP gear oil meeting GL-5 specification is ideal. In tropical regions with sustained high temperatures, we recommend 85W-140. For southern regions experiencing cold winters, synthetic 75W-90 provides better cold-start protection. Check the oil specification card shipped with your gearbox for the definitive recommendation.
🔹 Can I return a gearbox if it does not fit my flail mower?
إذا زودتنا بتفاصيل معداتك قبل الطلب، وتأكدنا من توافقها، نضمن لك تركيبها. في حال وجود مشكلة نادرة في التوافق، نقدم لك استبدالًا أو استردادًا كاملًا لعلب التروس غير المستخدمة خلال 30 يومًا من تاريخ التسليم، دون أي استفسارات. هدفنا هو تزويدك بعلبة التروس المناسبة من أول طلب.
🔹 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?
يمكن إجراء الصيانة الدورية (تغيير الزيت، استبدال الأختام، فحص المحامل) في الموقع باستخدام الأدوات القياسية. أما بالنسبة لعمليات إعادة البناء الرئيسية، فنحن نوفر مجموعات إصلاح شاملة تحتوي على جميع المحامل والأختام والحشيات. تتوفر كتيبات الخدمة التفصيلية وأدلة الفيديو للتنزيل من بوابة الدعم الخاصة بنا.
🔹 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
يستفيد مشغلو الآلات المتعددة من كتالوج علب التروس الشامل لدينا - جودة موحدة، وشحن موحد، وأسعار تنافسية على أساس الكمية عبر المجموعة الكاملة.
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 تشمل التركيبات ما يلي:
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. |
| إرشادات السلامة الخاصة بمكتب العمل الخاص في هيئة العمل الآمن في أستراليا |
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: requires regular inspection of all machinery with rotating drive components.
- Tasmania — WHS Regulations 2012: mandates operator training for all PTO-driven flail mower equipment.
Regional Coverage & Delivery Network
We deliver 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 →
Your trusted partner for agricultural gearbox solutions — standard and custom — across Australia and worldwide.
