Agricultural Gearbox
Full range of PTO, right-angle bevel, parallel shaft and worm gearboxes for rotary cutters, tillers, mowers, spreaders and harvesters — produced under ISO 9001 / IATF 16949 in our 28,000 m² facility, shipped to 60+ countries.
1. What is an agricultural gearbox?
An agricultural gearbox is the central transmission component in the kinematic chain of a farm implement. It receives rotational power from a tractor’s power take-off (PTO) — typically at 540 RPM or 1000 RPM — through a cardan / PTO shaft, and converts that input into a speed, torque and direction suitable for the working tool: a rotary blade, an auger, a mixing screw, a spreader disc.
Every agricultural gearbox has at least one input shaft and one output shaft, enclosed in a sealed cast housing filled with gear oil. The gears, bearings, seals and shafts inside that housing determine three things that matter to a farmer: how much torque the implement can deliver, how reliably it will survive a season of dust, mud and shock loads, and how often the operator has to be under it with a wrench.
Materials and heat treatment
Component-level specifications below reflect the standard build across our agricultural range. Premium options (e.g. ground-and-honed gears, Viton seals, salt-spray-tested coatings) are available on request.
- Housing: HT250 grey cast iron (general), QT500-7 ductile iron (heavy-duty cutters and tillers), aluminium alloy (light-weight units for compact tractors).
- Gears: 20CrMnTi or 20CrNi2MoA forged blanks, gas-carburised to 0.8–1.2 mm case depth, surface hardness HRC 58–62, core hardness HRC 30–35.
- Shafts: 40Cr or 42CrMo, quenched and tempered to HB 240–280.
- Bearings: Tapered roller bearings on input and output (NSK / SKF / FAG or domestic equivalent depending on customer choice).
- Seals: Double-lip NBR oil seal as standard; Viton (FKM) for high-temperature dairy / hot climate applications. IP65 sealing class.
Maintenance and off-season storage
A correctly specified agricultural gearbox should comfortably last 8–12 seasons of normal use. The maintenance schedule is short:
- Before every season: check oil level through the sight glass or dip-stick port; top up with SAE 80W-90 or 85W-140 GL-5 gear oil (consult the spec sheet for unit-specific recommendations).
- After the first 50 hours of new operation: drain and refill — this removes break-in metal fines.
- Every 250–300 hours thereafter: drain and refill.
- Annually: inspect input and output seals for weeping, check yoke and bolt torque on the input flange.
- Off-season storage: grease the input shaft splines, store the implement on a level surface with weight off the gearbox, cover the breather to prevent dust ingress.
Agricultural Gearbox Application
Post Hole Digger Gearbox
Rotary Mower Gearbox
Lawn Mower Gearbox
Rotary Tiller Gearbox
Fertilizer Spreader Gearbox
Agricultural Sprayer Gearbox
Rotary Cutter Gearbox
Irrigation Gearbox
Flail Mower Gearbox
Round Baler Gearbox
Feed Mixer Gearbox
Cutter Bars Gearbox
Square Baler Gearbox
Grader Driven Rake Gearbox
Silage Machine Gearbox
Fertilizer Seeder Gearbox
Combine Harvester Gearbox
Grain Transportation Gearbox
Potato Harvester Gearbox
Gearbox for Rotary Rakes
Corn Headers Gearbox
Grain Header & Sunflower Headers Gearbox
Gearbox for P.T.O. Generator & Circular Saws - Belt Saws
Fertilizer Mixer Gearbox
Hydraulic Drive Gearbox
Hydraulic Cutters Gearbox
Manure Spreader Gearbox
Snowblower Gearbox
Micro Tiller Gearbox
Agitators Gearbox for Sewage
Gearbox for Hay Tedders
Gearbox for Agricultural Machinery
Other Gearboxes
Brands That We Can Replace
Our product range includes gearboxes for agricultural applications such as rotary cutters, feed mixers, fertilizer spreaders, flail mowers, rotary mowers, rotary rakes, post hole diggers, square balers, and round balers. These units are engineered with mounting dimensions that match those of several well-known brands, delivering highly comparable performance and making them excellent drop-in replacements. Please be aware that we do not market or sell these products under any of those brand names. Any reference to specific models is provided solely to assist customers in identifying suitable replacements and verifying specifications.
Should you require custom modifications, feel free to contact us. Our team of professional engineers is ready to deliver high-quality, tailored solutions that meet your specific needs.
Bondioli & Pavesi
- Replacement of Bondioli & Pavesi 2061
- Replacement of Bondioli & Pavesi 2071
- Replacement of Bondioli & Pavesi 2081
- Replacement of Bondioli & Pavesi 2100
- Replacement of Bondioli & Pavesi 2125
- Replacement of Bondioli & Pavesi 2155
- Replacement of Bondioli & Pavesi 2201
Replacement of Comer Industries
- EP2803-Replacement of Comer T-301B
- EP280-Replacement of Comer T-301B
- Replacement of Comer T-269A
- Replacement of Comer T-279D
GB
- Replacement of GB M115F
Send us your spec sheet, drawing, or a photo of your existing gearbox.
Our application engineers reply within 12 working hours with a like-for-like quote, an alternative recommendation if a better-fit unit exists, or a feasibility opinion if it’s a new design.
Quote within 12 working hours
NDA signed before any drawing review
Free sample assessment for OEM project
Direct WhatsApp / Email contact with a named engineer