Rotary Mower Gearbox – Replacement of Comer Code T-305J
The Rotary Mower Gearbox T-305J, crafted by TEBSA in Argentina, is a reliable and robust solution for lawn mowers used in demanding agricultural and landscaping tasks. Designed to optimize blade performance while protecting the engine, this gearbox ensures smooth operation across Argentina’s diverse terrains, from the Pampas plains to suburban lawns in Buenos Aires. Since 1997, TEBSA has been a trusted manufacturer, offering a 100% quality guarantee and a 50% cost advantage over original brands, making the T-305J a top choice for farmers and landscapers.
Built to last, the T-305J reduces engine speed to match blade requirements while delivering high torque for efficient cutting. Its planetary gear arrangement minimizes noise and vibration, creating a quieter and more comfortable mowing experience. Whether you’re maintaining pastures for soybean crops or tidying up a golf course in Córdoba, this gearbox handles tough jobs with ease, backed by TEBSA’s expert engineering team, ready to respond within 24 hours.
Key Features and Technical Specifications of the T-305J Gearbox
The T-305J rotary mower gearbox stands out for its durability and precision engineering. Made from high-strength alloy steel with advanced forging and heat treatment processes like carbonitriding, it resists wear and tear even under heavy use. Its compact design integrates seamlessly with lawn mowers, reducing engine strain and extending equipment life. The gearbox’s planetary configuration ensures smooth power transfer, making it ideal for both small residential mowers and large agricultural machines.
Below are the detailed specifications of the T-305J, showcasing its versatility across different operating conditions:
Ratio (i) | Input Speed N1[rpm] | Power P1[kW] | Torque M2[Nm] | Shaft Type | Input | ||
X | Y | Z | |||||
1.35 | 540 | 183.8 | 2335 | '' 3/4 Z20 | 1'' 3/4 Z20 | '' 3/4 Z20 | X |
1.20 | 1000 | 183.8 | 2043 | '' 3/4 Z20 | '' 3/4 Z20 | '' 3/4 Z20 | X |
1.35 | 1000 | 183.8 | 2298 | '' 3/4 Z20 | '' 3/4 Z20 | '' 3/4 Z20 | X |
These specs highlight the T-305J’s ability to handle varying input speeds (540 or 1000 RPM) and deliver consistent torque (up to 2335 Nm), making it versatile for different mower types. The standardized 3/4 Z20 shaft ensures compatibility with most lawn mower models, simplifying installation for users in Argentina and beyond.
Benefits and Applications of the T-305J Rotary Mower Gearbox
The T-305J gearbox offers a range of advantages that make it a standout choice for lawn mower operators in agricultural and commercial settings:
Enhanced Durability: Constructed with alloy steel and treated with processes like carburization, the T-305J withstands the rigors of cutting thick grass, weeds, or small shrubs in Argentina’s wheat and corn fields.
Quiet Operation: The planetary gear design reduces noise and vibration, improving operator comfort during long hours of mowing in rural areas or urban parks.
Engine Protection: By managing high torque loads, it prevents engine damage, saving on costly repairs and downtime.
Cost Savings: TEBSA’s strategic manufacturing delivers a 50% cost advantage compared to original equipment, offering high value without compromising quality.
Versatile Applications: From maintaining pastures for livestock to grooming sports fields in Rosario, the T-305J adapts to diverse mowing needs.
Easy Maintenance: Designed for straightforward upkeep, with accessible seals and components, supported by TEBSA’s responsive technical team.
This gearbox shines in applications like:
Agricultural Mowing: Clearing crop residues in soybean or maize fields.
Landscaping: Keeping lawns pristine in suburban Buenos Aires or public parks.
Commercial Groundskeeping: Maintaining golf courses, sports fields, or large estates with precision.
For online buyers searching for a “reliable rotary mower gearbox in Argentina” or “T-305J gearbox for lawn mowers,” the T-305J delivers performance and affordability, backed by TEBSA’s ISO9001-2015 certification.
Maintenance and Installation Tips for the T-305J Gearbox
To ensure the T-305J performs at its best, regular maintenance is key. Here’s how to keep it in top shape for Argentina’s demanding conditions:
Inspect Regularly: Check for oil leaks, gear wear, or loose bolts, especially after heavy use in dusty Pampas fields.
Lubricate Properly: Use high-quality gear oil (as recommended by TEBSA) and check levels every 50 hours of operation. Change oil annually or after 500 hours.
Clean the Shaft: Remove debris from the 3/4 Z20 shaft and apply fresh grease to prevent corrosion, critical in Argentina’s humid climates.
Align Correctly: Ensure the gearbox is properly aligned with the mower’s PTO to avoid uneven wear or vibration.
Store Safely: When not in use, keep the gearbox in a dry, covered area to protect it from rain or extreme weather.
For installation, the T-305J’s standardized shaft design makes setup simple. Connect it to the mower’s PTO, secure all bolts, and verify alignment before operation. TEBSA’s team is available within 24 hours to assist with any questions, ensuring a smooth start.
Below is a quick reference for maintenance intervals:
Task | Frequency |
Check oil level | Every 50 hours |
Change gear oil | Annually or 500 hours |
Inspect seals and gears | Every 100 hours |
Clean and grease shaft | Every 50 hours |
By following these steps, users can maximize the T-305J’s lifespan, keeping mowing operations efficient and cost-effective.
About TEBSA and Our Range of Agricultural Gearboxes
TEBSA, based in Argentina since 1997, is a leading manufacturer of agricultural machinery components, known for reliability, innovation, and competitive pricing. With a 50% cost advantage and a 100% quality guarantee, we’ve earned trust across Argentina and beyond, backed by ISO9001-2015 certification. Our talented engineering team responds to inquiries within 24 hours, ensuring seamless support for farmers, landscapers, and industrial operators.
In addition to the T-305J rotary mower gearbox, TEBSA offers a wide range of agricultural gearboxes tailored to various needs:
Rotary Cutter Gearboxes: For heavy-duty cutting in crop residues or pastures.
Fertilizer Spreader Gearboxes: For precise nutrient distribution in soybean or wheat fields.
Post Hole Digger Gearboxes: For fencing or planting in Argentina’s rural landscapes.
Flail Mower Gearboxes: For shredding tough vegetation in orchards or vineyards.
Round Baler Gearboxes: For efficient hay and straw baling.
Each product is crafted with materials like alloy steel, stainless steel, or aluminum and processed using techniques such as forging, grinding, and surface treatments like blackening or powder coating. Whether you’re searching for a “lawn mower gearbox supplier in Argentina” or “buy agricultural gearbox online,” TEBSA delivers solutions that boost productivity and safety.
Ready to upgrade your mower? Contact TEBSA today to learn more about the T-305J or explore our full catalog of agricultural gearboxes.
About us

We guarantee top-quality products at the best prices in China! Special orders are welcome, and if you’re interested in any of our products, feel free to reach out for more detailed information. We ensure our products are safe, high-quality, and reasonably priced. Please contact us as soon as possible if you’d like to learn more. We’re eager to cooperate with you!
A large portion of our products is exported to Europe and the Americas, with both standard and custom options available. We can manufacture according to your drawings or samples, using standard materials or as per your specific requirements. Choosing us means choosing reliability.

Materials Available
1. Stainless Steel: SS201, SS303, SS304, SS316, SS416, SS420
2. Steel:C45(K1045), C46(K1046),C20
3. Brass:C36000 ( C26800), C37700 ( HPb59), C38500( HPb58), C27200(CuZn37), C28000(CuZn40)
4. Bronze: C51000, C52100, C54400, etc
5. Iron: 1213, 12L14,1215
6. Aluminum: Al6061, Al6063
7.OEM according to your request

Surface Treatment
Annealing, natural canonization, heat treatment, polishing, nickel plating, chrome plating, zinc plating,yellow passivization, gold passivization, satin, Black surface painted etc.
Processing Method
CNC machining, punch,turning, milling, drilling, grinding, broaching, welding and assembly

QC & Certificate
Technicians self-check in production,final-check before package by professional Quality inspector
ISO9001:2008 , ISO14001:2001,ISO/TS 16949:2009
Package & Lead Time
Size: Drawings
Wooden Case/Container and pallet, or as per customized specifications.
15-25days samples. 30-45days offcial order
Port: Shanghai/Ningbo port

Industries We Service
