Převodovka PTO rotačního kultivátoru pro zemědělskou přípravu půdy

The rotary tiller Převodovka PTO is the central power transmission component in any tractor-mounted rotavator system. It receives rotational energy from the tractor’s power take-off shaft at a standardized 540 RPM and converts it — through precision spiral bevel gears — into the exact speed and torque profile that the tiller blades require to break, aerate, and mix soil effectively. Without a properly functioning zemědělská převodovka, even the most powerful tractor cannot deliver consistent tillage depth or uniform soil texture.

Our rotary tiller Převodovka PTO series is manufactured as a high-quality aftermarket replacement that is fully interchangeable with original OEM parts from brands such as Comer Industries, Omni Gear, and Bondioli & Pavesi. Every unit matches the original mounting bolt pattern, shaft dimensions, spline profile, and gear ratio — making installation a straightforward bolt-on process with zero modification required to your existing tiller frame.

Disclaimer: Brand names mentioned above are referenced solely for compatibility identification purposes. Our products are aftermarket replacement parts, not OEM parts. We are not affiliated with or endorsed by any of the brands mentioned. All replacement parts are fully interchangeable with the corresponding OEM parts.

Ten/Ta/To převodovka s vývodovým hřídelem in a rotary tiller serves as a right-angle transmission unit that redirects the horizontal rotational force from the tractor PTO shaft downward (or rearward) to the tiller blade rotor. Here is the power flow path from engine to soil:

Step 1 — PTO Input: The tractor engine drives the PTO output shaft at a standardized 540 RPM. A PTO drive shaft with universal joints connects the tractor PTO to the gearbox input shaft. The input shaft features a 6-spline (35mm diameter) connection per ISO 500 Type 1 standards.

Step 2 — 90-Degree Direction Change: Inside the gearbox housing, a matched pair of spiral bevel gears meshes at precisely 90 degrees. The input bevel pinion (mounted on the horizontal input shaft) drives the output bevel crown gear (mounted on the vertical or angled output shaft). This converts horizontal rotation into vertical rotation to drive the tiller blade shaft below.

Step 3 — Speed and Torque Conversion: Depending on the gear ratio selected (2.07:1 for heavy clay soils, 1.31:1 for standard conditions, or 1:1 for light soils), the gearbox either reduces the output speed while increasing torque or transmits at a 1:1 ratio. For example, at a 2.07:1 reduction ratio, the 540 RPM input becomes approximately 261 RPM output with roughly double the input torque — ideal for breaking compacted or rocky ground.

Step 4 — Blade Rotor Drive: The output shaft connects to the tiller rotor shaft (often through a secondary chain or gear drive within the tiller frame), which spins the L-shaped or C-shaped tiller blades through the soil at the calculated depth and speed.

Premium 20CrMnTi Gear Material

Unlike generic gearboxes that use standard 45# carbon steel, our gears are forged from 20CrMnTi low-carbon alloy steel — the same grade used by leading European zemědělská převodovka manufacturers. After carburizing heat treatment, the tooth surface reaches HRC 58-62 for exceptional wear resistance, while the core maintains HRC 33-38 for impact toughness. This dual-hardness profile is critical for rotary tillers that regularly strike rocks and buried debris.

DIN Grade 6-7 Gear Precision

Every spiral bevel gear pair is CNC-hobbed and then ground to DIN Grade 6-7 tooth accuracy. This level of precision ensures smooth meshing, minimal backlash, reduced noise levels (below 72 dB at rated load), and even load distribution across the full tooth face. The result is longer gear life and consistent power transmission efficiency above 96% — a measurable difference you can observe in reduced fuel consumption over a full tilling season.

Heavy-Duty Cast Iron Housing

The gearbox housing is sand-cast from HT200 gray cast iron and then precision CNC-machined on all bearing bore surfaces and mating faces. HT200 provides excellent vibration damping — essential for rotary tillers operating in rocky or root-filled soil where sudden impact loads are common. Wall thickness is optimized through FEA analysis to provide maximum rigidity without excessive weight. IP54 sealing protects internal components from dust, mud, and splash water typical of field tillage conditions.

Zesílená kuželíková ložiska

Both the input and output shafts are supported by tapered roller bearings sized for a minimum 20,000-hour design life under rated load conditions. Tapered rollers handle the combined radial and axial thrust loads generated by spiral bevel gear meshing far better than the deep-groove ball bearings found in lower-cost alternatives. Bearing preload is set during assembly using calibrated shims to eliminate shaft play and ensure gear mesh accuracy throughout the operational lifespan.

Double-Lip NBR Oil Seals

Each shaft penetration point uses double-lip NBR (nitrile rubber) oil seals that provide a primary sealing lip for oil retention and a secondary dust exclusion lip to prevent soil particles and water from entering the gearbox housing. For paddy field or high-moisture environments, FKM (Viton) seals are available as an upgrade option with a wider temperature range (-30 C to +120 C) and superior chemical resistance.

Shear Bolt Overload Protection

A sacrificial shear bolt is installed on the input or output shaft as a mechanical fuse. When the tiller blades strike an immovable object — a large rock, buried concrete, or a tree root — the shear bolt breaks before the impact force can damage the expensive bevel gears or housing. Replacement shear bolts cost less than one dollar each and can be changed in the field in under five minutes, protecting your investment in the gearbox from catastrophic and costly failures. Slip clutch options are also available for applications with frequent overload events.

Příprava rýžového pole

Rotary tillers with 2.07:1 reduction gearboxes are the standard tool for preparing flooded rice paddies across Korea, Japan, and Southeast Asia. The high-torque low-speed output breaks waterlogged clay soil into fine particles needed for rice transplanting. FKM seal upgrades are recommended for prolonged submerged operation.

Dryland Crop Cultivation

For wheat, corn, soybean, and vegetable field preparation, 1.31:1 or 1:1 ratio gearboxes provide balanced speed and torque for efficient soil aeration without excessive pulverization. Standard NBR seals handle the dusty but non-submerged conditions typical of dryland farming operations in temperate and arid regions.

Orchard and Vineyard Soil Management

Compact rotary tillers with lower HP gearboxes (12-25 HP) are widely used between tree rows and vine rows for weed control, soil loosening, and cover crop incorporation. The 1:1 ratio gearbox provides adequate speed for light-duty inter-row cultivation without disturbing shallow root systems.

Seedbed Preparation

Creating a fine, level seedbed for small seeds (lettuce, carrot, onion) demands consistent tilling depth and uniform soil particle size. The precision gear meshing in our převodovka vývodového hřídele traktoru maintains constant output speed under varying load, delivering uniform tillage results across the full working width.

Cover Crop Incorporation

Tilling green manure cover crops back into the soil requires adequate speed to chop plant material while mixing it into the top soil layer. A 1.31:1 gearbox ratio delivers the right balance of cutting speed and mixing torque for this increasingly popular soil health management practice.

Greenhouse and Nursery Beds

Small-frame rotary tillers powered by compact tractors (12-25 HP) are essential equipment in commercial greenhouse and nursery operations. These units use lightweight gearboxes with aluminum housing options for easier handling and reduced overall implement weight on soft greenhouse soils.

🇰🇷 Gyeonggi-do, South Korea — Rice Paddy Tiller OEM

A mid-size agricultural machinery assembler in Hwaseong-si was purchasing Comer T-22C rotary tiller gearboxes from an Italian distributor at $185 per unit with 8-10 week lead times. After discovering our website through a Google search for “rotary tiller PTO gearbox Korea” in March 2025, they requested sample units for comparison testing.

Výsledek: After 400 hours of field testing across three farms in Icheon rice paddies (April-August 2025), our gearboxes showed zero oil leaks and identical noise levels to the Italian originals. The client switched 100% of their annual volume (3,200 units) to our factory, saving 28% on unit cost with delivery reduced to 15 working days.

“The dimensional accuracy was indistinguishable from the Comer originals. Our assembly team did not need to adjust a single shim. We wish we had found this supplier three years earlier.” — Mr. Choi, Procurement Manager

🇯🇵 Niigata Prefecture, Japan — Compact Tiller Manufacturer

A Japanese compact tractor attachment manufacturer needed 15HP-rated tiller gearboxes with a non-standard 1.5:1 ratio for their proprietary tiller design. Their previous Chinese supplier had inconsistent gear tooth contact patterns causing premature wear after just one rice growing season.

Výsledek: We developed a custom 1.5:1 ratio prototype in 18 days and delivered the first production batch of 500 units in 38 days. After two full growing seasons (2024-2025), the client reported zero warranty claims versus a previous 8% return rate. Annual order volume has grown to 2,000 units.

“The gear contact pattern test showed 85%+ tooth face coverage — significantly better than both our previous supplier and the OEM reference. Outstanding quality at a fair price.” — Mr. Yamamoto, Engineering Director

🇻🇳 Mekong Delta, Vietnam — Agricultural Cooperative

A large agricultural cooperative operating 120 tractors with rotary tillers across 8,000 hectares of rice land in the Mekong Delta was experiencing a 15% annual gearbox failure rate with their existing supplier. Most failures were oil seal leaks during the wet-season (June-November) flooding period.

Výsledek: We supplied 150 replacement gearboxes with FKM seal upgrades in September 2024. After the entire 2025 wet season, only 2 units required seal replacement (1.3% vs. previous 15%). The cooperative estimated this saved over $45,000 in downtime and repair costs during their most critical planting window.

“The FKM seal upgrade alone was worth the entire price difference. Our tractors stayed in the paddies when they needed to be, not in the repair shop.” — Mr. Tran, Operations Manager

🇦🇺 Queensland, Australia — Sugarcane Farm Equipment Dealer

An Australian farm equipment dealer serving sugarcane growers in North Queensland needed high-torque 2.07:1 ratio tiller gearboxes for inter-row cultivation in heavy black clay soil. Existing Italian-sourced units were priced above AUD 380 with 12-week lead times that caused stockout issues during peak season.

Výsledek: We provided 200 units at 32% below the Italian price, delivered CIF Brisbane in 22 days. After one full sugarcane growing cycle, the dealer reported “identical field performance to the originals” and placed a repeat order for 350 units.

“Our customers cannot tell the difference from the original gearbox — except on the invoice. We have made this our standard replacement part going forward.” — Mr. Henderson, Parts Manager