Gearbox for Flail Mower

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 Agricultural Gearbox

🛠 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
出力速度範囲	146 – 2447 RPM	Depends on selected ratio
塗装システム	2コート工業用	Stainless option for corrosive env.
Maximum Input Torque	800 Nm	With overload protection
Quality Certification	ISO 9001:2015	Audit reports available

Power & Torque Ratings

1mの距離での騒音	≤ 75 dB(A)	Low-noise profiles optional
プライマリーベアリング	Needle Roller Bearings	Premium bearing upgrades
正味重量	14 kg	Varies by configuration
Input Shaft Spline	6-spline (1-3/8″) / 21-spline (1-3/4″)	20-spline, 8-spline on request
出力軸タイプ	Flanged output	Custom output configurations

Construction & Materials

Centre Distance	110 mm	Per gear ratio
石油生産能力	3.0リットル	Oversized sump available
Gear Face Width	25 mm	Wider for high-torque
入力軸径	40 mm	Custom diameters
プライマリーギアタイプ	Herringbone Gears	Custom tooth profiles on request

Sealing, Lubrication & Environment

Drain Plug Type	Quick-drain valve	Sampling port option
潤滑方法	ミスト潤滑	Forced lube for high-duty cycles
Ambient Temperature Range	-30°C to +105°C	Arctic / tropical variants
設計基準	ISO 6336 + FEA verified	Third-party certified
Breather / Vent	Screw-in breather cap	All-weather types

お問い合わせ先エンジニアリングチーム 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
Spare Parts	Parts catalogue unavailable	Complete rebuild kits off-the-shelf
Operating Efficiency	88-92% — noticeable temperature rise during operation	96-98% — minimal heat generation, lower fuel costs
シーリングシステム	Paper gaskets and basic lip seals	トリプルバリアシール：スプリング式リップ＋Vリング＋外部スリンガー
住宅設計	Welded steel fabrication, dimensional inconsistency	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
表面保護	No primer — surface rust within weeks	Cathodic e-coat + powder coat, 1000-hr salt spray test

私たちに切り替える農家 Flail Mower gearbox 投資額は、ダウンタイムの削減とメンテナンスコストの低減により、最初のシーズンで回収できると報告されています。品質は投資であり、費用ではありません。

Flail Mower application

🔧 Power Pathway: How Your Flail Mower Gearbox Works

私たちの 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

ボブキャット — 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.

💡 プロのヒント： 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.

Agricultural Gearbox Collection

🔧 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

注入口プラグを取り外し、レベルインジケーターに達するまで推奨ギアオイルをゆっくりと注入します。ギアボックスの取扱説明書に記載されている潤滑油グレード（通常はSAE 80W-90 GL-5または同等品）を使用してください。注入口プラグを元に戻し、手で締めた後、レンチでしっかりと締めます。ブリーザーキャップが清潔で、詰まりがないことを確認してください。

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

PTOドライブシャフトをギアボックスの入力シャフトから切り離します。フロアジャッキまたは天井クレーンでギアボックスの重量を支えます（一般的な重量：モデルによって15～70kg）。締め付け応力を均等に解放するため、すべての取り付けボルトを十字型に外します。古いギアボックスを慎重に下ろし、脇に置きます。

ステップ7：テスト運転と慣らし運転

トラクターを始動し、低回転数（約300回転/分）でPTOを作動させます。異音（研磨音、うなり音、ノッキング音、カチカチ音など）がないか注意深く聞いてください。15～20分間低速で運転し、ギアボックスハウジングの温度を（注意深く）手で監視します。すべてのシールと取り付け面からのオイル漏れがないか確認してください。徐々に最高運転速度まで上げていきます。

⚠ 重要: 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.

⚠ PTO作動時にギアボックスから金属的なカチッという音がする

推定原因： Overload protection mechanism is loose

推奨される行動： PTO作動時のみに発生する異音（運転中は発生しない）は、通常、ドライブシャフトのバックラッシュを示しています。ドライブシャフトの伸縮チューブの摩耗を確認してください。運転中に異音が発生する場合は、内部摩耗によるギアのバックラッシュ過多が考えられます。異音が徐々に大きくなる場合は、ギアボックスの点検を受けてください。

⚠ Abnormal Grinding or Whining Noise

推定原因： Foreign object trapped in gear mesh

推奨される行動： 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.

⚠ 入力軸が回転している間、出力軸の回転が停止します

推定原因： Internal shaft fracture

推奨される行動： まず過負荷保護装置を確認してください。ギアボックスに最近急激な過負荷がかかった場合は、これが最も可能性の高い原因です。マニュアルに従って、せん断ボルトを交換するか、スリップクラッチをリセットしてください。過負荷保護装置に異常がない場合は、ギアボックス内部に損傷があり、専門業者による修理が必要です。

⚠ 運転中の過度の振動

推定原因： Unbalanced flail rotor or damaged output coupling

推奨される行動： 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.

⚠ギアボックスが過熱しています

推定原因： Incorrect oil grade (too thick or too thin for conditions)

推奨される行動： 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.

上記の手順で問題が解決しない場合は、技術サポートチームにお問い合わせください専門家による診断をご希望の場合は、遠隔でのトラブルシューティングや、重大な故障状況における代替機の派遣も承ります。

📝 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

お客様：	Derek Whitfield — commercial grass cutting contractor
位置：	Mackay, QLD
農場規模：	3500 acres
応用：	Flail Mower gearbox for flail mower — grass cutting
購入理由：	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

手術： cooperative farming group | サイズ： 1000 acres | 使用： Flail Mower gearbox for grass cutting

購入理由： シーズン途中の緊急交換。オリジナルのギアボックスが壊滅的な故障を起こしたため。

“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

クライアント： Luke Anderson | 応用： Flail Mower gearbox — grass cutting

目的： New equipment build — specifying aftermarket gearbox as OEM improvement

“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

お客様：	Terry Voss — broadacre cropping operation
位置：	Hamilton, VIC
農場規模：	1000エーカー
応用：	Flail Mower gearbox for flail mower — grass cutting
購入理由：	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

手術： intensive horticultural farm | サイズ： 4000 acres | 使用： Flail Mower gearbox for grass cutting

購入理由： 1シーズンも持たなかった安価な社外品からのアップグレードです。

「カスタム比率オプションは、当社の事業運営にとって画期的なものでした。他社では提供できない、標準外の出力速度が必要だったのですが、エンジニアリングチームが1週間以内に解決策を設計してくれ、初日から完璧に機能しました。」

❓ Flail Mower Gearbox FAQ — Everything You Need to Know

🔹 Do you provide technical support after purchase?

Yes — every purchase includes access to our engineering support team for installation guidance, troubleshooting, maintenance advice, and parts ordering. Support is available via phone, email, and our online contact form. There is no charge for technical support during or after the warranty period.

🔹ギアボックスにはどのような書類が同梱されていますか？

すべてのギアボックスには、トルク仕様、潤滑およびメンテナンススケジュール、個々の部品番号が記載された部品図、保証登録カード、およびユニットのシリアル番号とテスト結果が記載された品質検査証明書が同梱されています。

🔹 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?

ご注文前に機器の詳細をご提供いただき、弊社で互換性を確認させていただければ、適合は保証いたします。万が一、互換性の問題が発生した場合は、お届け後30日以内であれば、未使用のギアボックスを無条件で交換または返金いたします。弊社は、初回のご注文で最適なギアボックスをお届けすることを目指しております。

🔹 このギアボックスは、有機認証を受けた農業での使用に適していますか？

当社のギアボックスは機械部品であり、有機認証に影響を与える物質は一切含まれていません。ただし、潤滑油の選択については考慮が必要です。当社では、オーストラリアおよび国際的な有機農業基準に適合する食品グレードの生分解性ギアオイルをお勧めできます。

🔹ギアボックスは現場で整備またはオーバーホールできますか？

定期点検（オイル交換、シール交換、ベアリング点検）は、標準工具を使用して現場で実施できます。大規模なオーバーホールには、ベアリング、シール、ガスケットを含む完全なオーバーホールキットをご用意しています。詳細なサービスマニュアルとビデオガイドは、サポートポータルからダウンロードできます。

🔹 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: 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

Our Factory

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.

📧 Contact Our Engineering Team

🏭 Discover Our Full Capabilities →

Your trusted partner for agricultural gearbox solutions — standard and custom — across Australia and worldwide.