Agricultural Gearboxes
Flail Mower Gearbox
Built for durability. Engineered for power.
Our gearboxes deliver high performance and long-lasting
reliability in the toughest conditions.
ABOUT FLAIL MOWER GEARBOXES
Flail Mower Gearboxes are essential components in agricultural machinery, transmitting power from the tractor’s PTO or engine to the flail rotor while maintaining consistent cutting performance. Their internal gear systems regulate speed and torque to suit different crop residues and terrain, while the heavy-duty construction ensures long-term reliability.
JENA provides a broad range of gearboxes for flail mowers, verge mowers, and mulching machines (30–300 HP). With over 25 years of OEM/ODM expertise, JENA supplies dependable gearbox solutions to agricultural equipment manufacturers worldwide.
MODEL LIST
9.310
9.311
9.311-17W
9.312
9.2071
30
75
0766.0037
EFN125-01-002
ORDER INFORMATION
MOQ | Delivery Time | Port of Loading | Get samples | Warranty | Customization | Delivery Term |
|---|---|---|---|---|---|---|
2 pieces | 30-60 days | Ningbo / Shanghai | Yes, it's ok. | 1 year | Available, contact with drawings | EXW · FOB · CFR · CIF · Others |
CATALOG DOWNLOAD
FAQ FOR BUYERS
Factory or trading company?
Jiaxing JENA Gearbox Co., Ltd. is a professional gearbox manufacturer with our own production facilities. We focus on precision engineering and strict quality control to ensure reliable and long-lasting performance.
What is your MOQ?
The minimum order quantity (MOQ) is typically 2 pieces. For non-standard or customized products, please send us the detailed specifications for a quotation.
Can I get a sample?
Yes, we can provide samples. For details, please contact our sales team.
What are your payment terms?
Our standard payment terms are 30% deposit and 70% before shipment by T/T, or 100% payment before shipment by T/T for new customers.
For long-term clients, we can explore more flexible solutions together.
Can you produce custom products?
Yes, customization service is one of our core services. Just tell us your requirements or send the drawings to us, and we’ll take care of the rest.
How to choose the right gearbox?
Check whether the photos and gearbox type (helical, bevel, worm, planetary, etc.) match.
Verify that the part/OE number or standard reference corresponds to your requirement.
Confirm the target machine or vehicle model, its duty cycle, and use year.
Finally, check the gearbox’s ratio, input/output shaft diameters, mounting dimensions, and allowable backlash to ensure accurate fit.
Do you offer branded customized packaging?
Yes, we can provide branded packaging.
We offer various custom packaging options for gearboxes, including reinforced cartons, wooden cases, palletized packaging, and individual protective boxes. Customized nameplates, labels, and other tailored packaging solutions are also available upon request.
What is your lead time?
For our existing models, the delivery cycle is usually 30-60 days;
For newly developed or customized products, the delivery cycle may be longer. Please consult our sales team for specific details.
How long is your product warranty?
All products manufactured by JENA are covered with a 1 Year warranty.
How to protect our rights?
All shipments are properly documented, and we provide OEM services under strict confidentiality. All related materials—such as drawings, manuals, and test reports—remain the sole property of the brand owner.
DIDN'T FIND WHAT YOU WERE LOOKING FOR?
JENA GROUP has been offering oem and odm service to customers around 25 years. All kind of ratios and applicaitons can be customized as customers needs.
WHY CHOOSE JENA GEARBOX
01.
Heavy-Duty Construction for Harsh Mowing Conditions
Our flail mower gearboxes are built with high-strength cast iron housings and durable internal components, providing excellent resistance to impact, vibration, and continuous heavy-duty operation.
02.
High Torque Transmission for Efficient Cutting
Designed for powerful torque delivery, our gearboxes ensure stable rotor rotation and efficient cutting performance in grass, weeds, and tough vegetation.
03.
Precision Machining for Smooth Power Transfer
Each gearbox component is precision-machined to achieve accurate gear engagement, reducing noise, vibration, and power loss during operation.
04.
Reliable Performance for Various Mowing Applications
Our flail mower gearboxes are suitable for tractors and agricultural machines, widely used for pasture maintenance, roadside mowing, landscaping, and field management.
05.
Quality-Tested for Long-Term Reliability
Every gearbox undergoes strict inspection and performance testing to ensure dependable operation and consistent quality before shipment.
06.
OEM & Custom Gearbox Solutions Available
We provide OEM and customized gearbox solutions based on your machine requirements, drawings, and technical specifications.
FLAIL MOWER GEARBOX OVERVIEW
Functions
- Power transmission & speed conversion — Converts tractor PTO speed (commonly 540 / 1000 RPM) into lower drum/flail RPM and higher torque suitable for the flail rotor, ensuring consistent chopping performance and stable rotor speed under varying workloads.
- Durability & protection — Heavy-duty housings (cast iron / alloy steel) with corrosion-resistant finishes and robust sealing prevent ingress of dust, plant debris, and moisture, protecting gears and bearings from abrasive wear.
- Safety / overload protection — Slip clutches, shear bolts, or torque-limiting devices interrupt torque transmission if the flails jam or strike large obstacles, preventing gearbox and driveline damage.
Typical Agricultural Applications
- Vegetation shredding & pasture maintenance — Powers the flail drum to cut and mulch grass, weeds, and crop residues for pasture management and field cleaning.
- Brush and bramble control — High-torque gearboxes handle tougher loads when shredding woody stems and dense vegetation.
- Vineyard & orchard under-row work — Compact gearbox configurations suit narrow-row flail mowers used between vines and trees.
- Roadside and municipal mowing — Robust designs withstand frequent impacts and debris, suitable for verge and roadside maintenance.
Key Design Features
- PTO interface & spline standards — Input shafts match standard tractor PTO splines and speeds; correct sizing ensures safe engagement and minimizes wear.
- Ratio options & modular output — Multiple reduction ratios deliver the required flail RPM; output shafts adapt to different drum and knife systems.
- Sealing & corrosion resistance — Reinforced seals, coated housings, and protected bearings extend service life in abrasive and humid environments.
- Serviceability — Accessible oil-fill, level, and drain plugs, plus breather and inspection points, simplify routine field maintenance.
Short Maintenance & Inspection Checklist
- Check oil level and condition regularly; most flail mower gearboxes use 80W-90 or similar gear oil and need level checks every ~50 hours or per manufacturer guidelines.
- Inspect seals, shaft keys, and flail/knife fixings before each season or after heavy use.
- Replace shear bolts or reset slip clutches after overload incidents; record events to detect recurring issues.
- Verify compatibility—PTO speed/type, shaft diameters, keyway specifications, mounting pattern, and required ratio—before ordering.
ABOUT JENA GROUP
Zhejiang JENA Transmission Technology Co., Ltd. was established in 2000, located in Jiaxing city, Zhejiang Province, east of China.
Our products include bevel gearboxes, parallel reducers, worm gear cases, and transmission housings — nearly a thousand types in total. These gearboxes are widely used in agricultural and industrial equipment such as rotary cutters, rotary tillers, flail mowers, fertilizer spreaders, post hole diggers, lawn mowers, hydraulic drive systems, and potato harvesters.
OEM gearbox solutions are also available to meet customized application needs. Contact our technical team to discuss your specific requirements.
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