Description
The EP-9.311 Rotary Tiller Cultivator Gearbox is a heavy-duty mechanical transmission unit engineered to transfer mechanical power from a tractor’s Power Take-Off (PTO) shaft directly to the rotary cultivator rotor. This high-efficiency rotary tiller transmission is built to withstand continuous torque shocks and harsh field conditions. It converts the input speed of 540 rpm down to the optimum working rotational speed of the tiller blades, ensuring consistent soil mixing, seedbed preparation, and weed control.
By utilizing a robust bevel gear configuration, this gearbox shifts power at a 90-degree angle with minimal energy loss. It is an essential component for tillage machinery, designed to prevent engine overload by maintaining a balanced speed-to-torque conversion ratio under varying soil densities.
EP-9.311 Rotary Tiller Gearbox Technical Specifications
| Parameter Spec | Value / Details |
|---|---|
| Item Model | HC-9.311 / EP-9.311 Boîte de vitesses pour fraise rotative |
| Transmission Ratio | 1 : 3 |
| Internal Gear Teeth | 36 / 12 |
| Gear Module | 4.35 |
| Input Power Rating | 50 HP (Horsepower) |
| Rated Input Speed | 540 rpm |
| Input & Output Shaft | 1 3/8″ Z6 spline / Optic axis standard |
| Net Weight (N.W.) | 21 KG |
Technical Schematic & Dimensions
EP-9.311 Rotary Tiller Gearbox——Key Features & Material Construction
- Heavy-Duty Cast Iron Housing: Features a high-tensile strength cast iron casing that dampens operational vibrations and withstands impact from rocks and hard ground.
- Precision-Machined Bevel Gears: Equipped with premium steel bevel gears (36T/12T, 4.35 Module) processed via forged CAD surface machining and case hardening for maximum wear resistance.
- Interchangeable Design Layout (RG70/CB70 Series): Developed within the Ever-power RG70 and CB70 industrial configurations, allowing clients to utilize shared parts and significantly reduce custom tooling or mold-making fees.
- Standardized PTO Interface: The 1 3/8″ Z6 splined shaft seamlessly matches standard tractor PTO splines, reducing runout and ensuring stable torque transmission.
- Optimal Thermal Dissipation: Built-in structural cooling fins on the outer casing prevent heat build-up under high-load tillage runs, extending the lifespan of internal lubricants.
How to Replace the Oil Seal in a Rotary Tiller Gearbox
A worn-out oil seal is the primary cause of lubricant leaks, which can lead to rapid gear failure. Follow these mechanical maintenance steps to execute a professional replacement:
- Drain the Lubricant: Place a container underneath the drain plug, unscrew it, and fully discharge the internal gear oil before proceeding.
- Dismantle the Splined Shaft: Remove the locking bolts or snap rings securing the input shaft coupling or output flange, then gently slide the shaft assembly out.
- Extract the Worn Seal: Use a specialized oil seal puller or a flat-head screwdriver. Work carefully around the perimeter to avoid scratching the machined shaft surface or the inner casing bore.
- Clean and Inspect: Use solvent to clean the seal seat. Check the shaft for burrs, wear grooves, or corrosion. Polish away minor imperfections with fine emery cloth.
- Press-fit the New Seal: Coat the outer edge and inner lip of the new rubber-metal composite seal with grease. Using an installation sleeve or a socket matching the seal’s outer diameter, tap the new seal uniformly into position until it sits completely flush.
- Reassemble and Refill: Reinstall the shaft, tighten all locking elements to recommended torque specifications, and refill the gearbox with high-viscosity agricultural gear lubricant (e.g., SAE 80W-90). Run a dry test loop to verify zero leakage.
Field Applications & Machinery Matching
This agricultural transmission gearbox is designed to integrate into various active tillage machinery setups, ensuring reliable power transmission across diverse farming tasks:
Tractor-Mounted Rotary Tillers
Pairs perfectly with 50 HP compact and utility tractors running standard 540 rpm rear PTO drives to prepare heavy soil seedbeds.
Flail Cultivators & Shredders
Supplies high-torque rotation for rotary flail systems, shredding dense crop residue, stalks, and weeds into organic mulch.
Orchard & Vineyard Cultivation
Provides precise, low-speed ground working between orchard lanes, where continuous reliability is critical to prevent crop root damage.
Your Trusted Partner in Agricultural Machinery Parts
As an established, professional agricultural gearbox manufacturer and supplier in China, we combine strict production standards with reliable manufacturing support:
- Custom OEM Rotary Tiller Gearbox Manufacturing Service: We modify shaft profiles, spline layouts, casting shapes, and gear ratios based directly on your technical drawings or reference samples.
- Material Verification: We use inspected, certified high-grade structural steel and premium casting houses. Every gear undergoes precise metallographic testing and heat-treatment validation.
- In-House QC Testing: Every individual gearbox runs through rigorous dynamic load testing and pressure seal inspections before packaging to guarantee leak-free field startup.
- Global Delivery & Supply Chain Stability: We offer volume shipping arrangements with standard exporting packages, preventing logistics damage while maintaining steady wholesale pricing.
EP-9.311 Rotary Tiller Gearbox——FAQ
Q1: What is the gear oil capacity and oil rating for the EP-9.311 gearbox?
It holds about 1.2 to 1.5 liters of oil. We recommend high-viscosity industrial EP (extreme pressure) gear oil, such as SAE 80W-90 or 90WT, for high-torque field operations.
Q2: Can I request customized input or output shaft splines?
Yes. Through our Custom OEM manufacturing service, we can machine custom spline designs, smooth keyway shafts, or custom dimensions to match your exact tiller frame requirements.
Q3: How does the 1:3 ratio affect my tractor’s PTO speed?
The 1:3 configuration is a step-down gear ratio. An input speed of 540 rpm from the tractor PTO shaft translates to approximately 180 rpm output at the tiller blade rotor shaft, maximizing tillage torque.
Q4: What is the typical lead time for custom OEM bulk orders?
Standard orders process within 30 to 45 days. Custom castings or special spline designs require extra preparation time, typically ranging from 45 to 60 days depending on complexity.
Complete Agricultural Drivetrain & Power Solutions
We supply comprehensive driveline configurations designed to link the power system from the tractor engine flywheel directly to your implement’s cutting rotor. Ensure optimal field performance and overload protection by bundling your gearboxes with our high-matching Rotavator Spare Parts:
Arbres de prise de force
High-safety PTO drivelines with protective guards, compliant with CE and ISO safety norms.
Shear Bolt Yokes
Essential shear pin limits to decouple transmission in case the tiller blades hit rocks or tree roots.
Chain & Gear Drives
Precision side drive chains, sprockets, and gear setups to complete your rotary cultivator rebuilds.
Need High-Performance Mechanical Transmission Systems?
Upgrade your agricultural machinery with precision-built gearboxes. Besides our rotary cultivator series, we supply a comprehensive range of industrial gearboxes, including the EP-NMRV Series Worm Reducer (Aluminum), heavy-duty Planetary Gearboxes, and high-precision Helical Gearboxes.
