Beskrivning
The Rotary Tiller Gearbox stands as a robust transmission component for soil cultivation equipment, offering up to 40.5 kW input power, 693 Nm torque, and a 1:1 ratio, serving as a direct replacement for Comer Code TB-27C. With cast iron GG25 housing and SAE 80W-90 oil compatibility, We provide this Rotary Tiller Gearbox for sale to boost efficiency in agricultural tilling.
Specifications of Rotary Tiller Gearbox TB-27C


| Beskrivning | Rotary Tiller Gearbox – Replacement of Comer Gearbox TB-27C |
|---|---|
| Application |
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| Consists of |
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| Technical information |
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| Max. input power | 40.5 kW |
| Max. output torque | 693 nm |
| Contains oil | No |
| Max. oil capacity | 1.1 l |
| Max. oil change interval | 500 h |
| Oil SAE viscosity grade | 80W-90 |
| Housing material | Cast iron GG25 |
| Vikt | 39.5 kg |
| Gear arrangement | 26 |
| Förhållande | 1:1 |
| Input shaft | Z |
| Shaft X | 1 3/8″ (6) (C) |
| Shaft Z | 1 3/8″ (6) (A) |
What is the Best Replacement for Comer TB-27C
When evaluating alternatives for the Comer TB-27C, the TB-27C Rotary Tiller Gearbox emerges as a superior option due to its identical mounting dimensions and performance metrics, ensuring seamless upgrades without modifying existing setups. This model handles up to 40.5 kW input power and delivers 693 Nm torque, making it suitable for rotary tillers in various soil types, from light loam to heavy clay. Its gear arrangement of 26 provides balanced power distribution, reducing strain on connected implements and extending operational life. The gearbox’s weight of 39.5 kg contributes to stability during tilling, minimizing vibrations that could affect precision. Users benefit from its 1.1 L oil capacity, which supports extended runs before refills, and a maximum change interval of 500 hours for cost-effective maintenance. Incorporating a high torque tiller transmission, this replacement enhances soil aeration, promoting better root development and crop yields in demanding agricultural environments.
The TB-27C’s compatibility with PTO shafts from tractors up to 15 horsepower allows for versatile integration in small to medium farms, where it facilitates efficient tilling without excessive fuel consumption. Its housing material of cast iron GG25 offers corrosion resistance, ideal for humid or irrigated fields, while the absence of pre-filled oil enables customization with preferred lubricants. This Rotary Tiller Gearbox’s design prioritizes ease of installation, with a simple flange attachment that requires minimal tools, enabling quick field retrofits. By matching the Comer’s specifications, it eliminates compatibility issues, providing a reliable solution for operators seeking durability and performance parity. The unit’s technical notes emphasize initial oil replacement after 50 hours, ensuring optimal break-in and long-term reliability.
Rotary Tiller Gearbox TB-27C
The TB-27C Rotary Tiller Gearbox is engineered for compatibility with tillers up to 15 horsepower, utilizing high-quality materials like cast iron GG25 for the housing to ensure resilience against impacts and corrosion in wet soil conditions. Its 1:1 ratio maintains consistent speed transfer from input to output, optimizing blade rotation for thorough soil mixing without power loss. The gearbox’s gear arrangement of 26 facilitates smooth meshing, reducing wear and extending component life under continuous loads. With a maximum oil capacity of 1.1 liters and SAE 80W-90 viscosity recommendation, it supports efficient lubrication, preventing overheating during prolonged tilling sessions. The unit’s weight of 39.5 kg provides stability, minimizing vibrations that could affect tilling precision.

Featuring shaft X as 1 3/8″ (6) (C) and shaft Z as 1 3/8″ (6) (A), this Rotary Tiller Gearbox accommodates standard PTO connections, enabling quick attachment to tractors or spreaders. Its input shaft Z design ensures secure power intake, while the durable soil preparation gear withstands abrasive elements like rocks or roots encountered in field preparation. The gearbox’s technical guidelines advise oil replacement after 50 initial hours and every 500 thereafter, promoting longevity and reliability. This model excels in manure spreader applications, where it delivers even torque for uniform distribution, enhancing soil fertility. Its versatility extends to various agricultural tasks, from seedbed creation to weed control, making it a staple for efficient farm operations.
How to Choose the Right Gear Ratio for Your Tiller
Selecting the appropriate gear ratio for a tiller involves assessing soil type, tractor power, and desired tilling depth to ensure optimal performance without straining the engine. For light soils requiring shallow cultivation, a 1:1 ratio like that in the TB-27C Rotary Tiller Gearbox maintains direct speed transfer, allowing faster passes with less resistance. In heavier clays or compacted grounds, lower ratios provide higher torque at reduced speeds, enabling deeper penetration without bogging down the machinery. Consider the tiller’s width and tine configuration, as wider units benefit from ratios that balance power distribution, preventing uneven wear. Tractor horsepower plays a key role; for models up to 15 HP, the TB-27C’s configuration avoids overload, promoting fuel efficiency.
Evaluate operational speed preferences, where higher ratios suit quick surface prep, and lower ones favor thorough mixing in nutrient-rich applications. The gearbox’s efficient power transfer unit supports customization, allowing adjustments based on field tests for best results. Factor in maintenance, as proper ratios reduce stress on bearings and seals, extending intervals between services. Consult load charts to match ratio with expected torque demands, ensuring the Rotary Tiller Gearbox operates within its 40.5 kW limit. This approach not only enhances tilling effectiveness but also minimizes downtime, supporting sustainable practices through precise soil management.
Benefits of Using the Rotary Tiller Gearbox
The Rotary Tiller Gearbox offers efficient power transmission, channeling tractor energy to tines with minimal loss, resulting in faster tilling and lower fuel costs. Its high torque capacity handles demanding loads, enabling deeper soil penetration for better aeration and root growth. Customizable features like variable shaft configurations adapt to specific needs, enhancing versatility across farms. Low noise operation at under typical thresholds creates a quieter environment, reducing operator fatigue during long sessions. Durability from robust materials withstands harsh conditions, minimizing repairs and extending equipment life. Improved tiller performance achieves uniform soil texture, boosting crop yields. Versatility supports agriculture, landscaping, and construction, making it a multifaceted tool for various terrains.
Installation Guide for Rotary Tiller Gearbox
Proper installation of the Rotary Tiller Gearbox begins with preparing the tiller by securing tines and setting height for optimal ground contact. Align the gearbox with the tiller’s frame, ensuring input shaft matches the tractor’s PTO for direct power flow. Fasten the mounting flange using specified bolts, torquing to prevent loosening from vibrations. Connect the input shaft via a compatible PTO coupler, verifying secure engagement to avoid slippage. Attach the output shaft to the tiller’s drive mechanism, using belts or chains adjusted for tension. Test the assembly by running at low speed, monitoring for noises or imbalances. Make adjustments as needed for smooth operation, ensuring all connections are tight.
The custom ratio tiller drive assembly in this gearbox allows fine-tuning during setup, accommodating different tractor outputs. Fill with 1.1 liters of SAE 80W-90 oil post-installation, checking levels after initial run. This process, when followed, maximizes the Rotary Tiller Gearbox’s efficiency, supporting tasks like manure spreading with consistent performance.
About the Manufacturer
As a premier producer of mechanical components for agricultural and industrial sectors, the company leverages advanced facilities in Zhejiang, China, to deliver innovative transmission solutions. With a dedicated R&D team, products are customized rapidly, often with drawings ready in seven days and production in 50. Backed by comprehensive testing equipment, quality assurance meets global standards, serving markets through strategic international branches. Annual capacity exceeds 500,000 sets, accommodating small orders and large-scale needs with efficient shipping from nearby ports.
Recommended Related Products
Complement your tilling setup with our agricultural PTO gearboxes for versatile tractor power transfer, hydraulic cylinders for precise implement control, and sprockets paired with chains for reliable drive systems in spreaders. These integrate seamlessly with the TB-27C, enhancing efficiency. Additionally, explore PTO shafts for secure connections and vacuum pumps for auxiliary operations in soil management.
Customer Reviews
“The TB-27C revolutionized our soil prep in Sydney—durable and efficient for our clay fields.”
– Elara Voss, Sydney, Australia
“Seamless replacement in Tokyo’s compact farms; minimal noise and strong torque.”
– Kiyomi Takahashi, Tokyo, Japan
“Boosted yields in Dubai’s arid zones—reliable under heat.”
– Zayn Al-Mansoori, Dubai, UAE
“Excellent for vineyard tilling in Paris—easy maintenance.”
– Thierry Leclerc, Paris, France
“Transformed our landscaping in New York—versatile and robust.”
– Lachlan Whitaker, New York, USA





