Agricultural Sprayer Gearbox – Replacement of Comer Code D21B D21F
The Agricultural Sprayer Gearbox D21B/D21F from TEBSA Argentina delivers the exact speed and torque needed to drive sprayers for liquid fertilizers, herbicides, pesticides, and other chemicals across diverse farming tasks. Since 1997, TEBSA has crafted reliable solutions with a 100% quality guarantee, ensuring farmers in Argentina’s Pampas and beyond get equipment that performs under pressure.
This gearbox acts as the heart of agricultural sprayers, linking the tractor’s power take-off (PTO) to the sprayer pump. It adjusts rotational power to match the demands of crops like soybeans, corn, or wheat, letting operators fine-tune spray rates for different fields or conditions. Whether you’re working flat plains or hilly terrains, the D21B/D21F keeps your sprayer running smoothly, saving time and boosting yields.
Built tough with alloy steel gears, precision bearings, and sealed housing, this gearbox stands up to dust, moisture, and long hours. Its design cuts friction and wear, offering a 50% cost advantage over competing brands without skimping on durability. For Argentine farmers needing dependable, budget-friendly sprayer parts, TEBSA’s D21B/D21F is a go-to choice.
Why Choose the D21B/D21F Agricultural Sprayer Gearbox?
The D21B/D21F gearbox is more than a component—it’s a workhorse built for Argentina’s farming challenges. Here’s what sets it apart:
Precision Control: Adjusts pump speed to match crops or terrain, ensuring even chemical application for maximum coverage.
Rugged Build: Forged alloy steel gears and tapered roller bearings handle the grind of daily spraying in tough conditions.
Cost Savings: TEBSA’s 50% cost edge over original parts means you get top performance without breaking the bank.
Local Fit: Designed with Argentina’s fields in mind, from Córdoba’s soybean rows to Mendoza’s vineyards.
Easy Maintenance: Sealed housing and replaceable parts make upkeep simple, with TEBSA’s team ready to assist in 24 hours.
This gearbox powers sprayers for liquid fertilizers, weed control, and pest management, making it a staple for Argentine agriculture. Its versatility suits small farms and large operations alike, delivering consistent results season after season.
Specifications of Agricultural Sprayer Gearbox D21B/D21F
i | N1[rpm] | P1[kW] | M2[Nm] | Shaft Type | Input | |
X![]() | Z![]() | |||||
3.90 / 4.90 | 540 | 38.9 | - | 1'' 3/8 Z6 | L270 35 | X |
3.60 / 4.50 | 540 | 40.5 | - | 1'' 3/8 Z6 | L165 40 | X |
3.60 / 4.50 | 540 | 47.8 | - | 1'' 3/8 Z6 | L286 40 | X |
2.90 / 3.90 | 540 | 41.2 | - | 1'' 3/8 Z6 | L221 35 | X |
Applications and Benefits in Argentine Agriculture
The D21B/D21F agricultural sprayer gearbox shines in Argentina’s varied farming landscape, powering sprayers for precise chemical application. From Buenos Aires’ soybean fields to San Juan’s orchards, it handles tasks like:
Fertilizer Application: Ensures even liquid fertilizer distribution for crops like corn or wheat, boosting yields in fertile Pampas soils.
Pest and Weed Control: Drives sprayers to apply pesticides or herbicides, protecting crops from Argentina’s common pests like locusts.
Orchard and Vineyard Spraying: Adjusts spray rates for delicate crops in Mendoza, preventing over-application and waste.
Farmers love its flexibility. With gear ratios like 3.60 or 4.90, you can tweak pump speed to match flat fields or hilly terrains. This means less chemical runoff, better coverage, and healthier crops. For example, a soybean farmer in Córdoba can set a slower spray for dense rows, while a vineyard owner in Salta might speed it up for sparse vines.
The gearbox’s alloy steel gears, machined with TEBSA’s precision since 1997, keep power loss low. Tapered roller bearings cut friction, so your sprayer runs longer without overheating. The sealed housing blocks out dust and water—crucial for Argentina’s rainy seasons or dry, dusty plains. Plus, its 81-pound weight makes it sturdy yet manageable for most tractor setups.
Here’s a quick look at how it fits different sprayer types:
Sprayer Type | Application | Gear Ratio Used |
---|---|---|
Boom Sprayer | Large-scale soybean or corn fields | 3.90 / 4.90 |
Mist Sprayer | Vineyards or orchards | 2.90 / 3.60 |
Mounted Sprayer | Small farms or mixed crops | 3.60 / 4.50 |
This adaptability, paired with TEBSA’s 24-hour support, makes the D21B/D21F a trusted pick for farmers buying agricultural sprayer gearboxes online or locally in Argentina.
Technical Features and Maintenance Tips
The D21B/D21F gearbox is a feat of engineering, blending strength with smart design for Argentina’s agricultural sprayer needs. Its key technical highlights include:
Alloy Steel Gears: Forged and carburized for durability, handling torque up to 47.8 kW at 540 RPM.
Tapered Roller Bearings: Reduce friction and support high-speed shafts, extending gearbox life.
Sealed Housing: Protects against contaminants like Pampas dust or rain, with electrophoresis coating for rust resistance.
Flexible Shaft Options: Supports 1’’ 3/8 Z6 and L-series shafts, fitting most Argentine tractors.
Heat Treatment: Carbonitriding and tempering ensure gears withstand heavy loads without cracking.
These features make it ideal for industry-specific needs, like precision agriculture or large-scale chemical spraying. For buyers searching “reliable agricultural sprayer gearbox in Argentina,” the D21B/D21F delivers performance and value.
To keep it running smoothly, follow these maintenance steps:
Check Oil Regularly: Use manufacturer-approved gear oil and top off the 0.95 L capacity every 50 hours.
Inspect Seals: Look for leaks or wear to prevent dust ingress, especially after spraying in dry fields.
Clean Shafts: Wipe down the input shaft to avoid grit buildup, ensuring clean power transfer.
Align Properly: Misaligned PTO connections can strain bearings, so double-check during setup.
Store Smart: Keep the gearbox covered during Argentina’s wet seasons to avoid corrosion.
A well-maintained D21B/D21F can last years, saving you repair costs. TEBSA’s team, with decades of know-how, is just a call away if you need guidance.
Here’s a maintenance schedule for reference:
Task | Frequency | Notes |
---|---|---|
Oil Level Check | Every 50 hours | Use high-viscosity gear oil |
Seal Inspection | Monthly | Replace if cracked |
Shaft Cleaning | After each use | Remove dust or debris |
By sticking to this routine, you’ll get the most out of your gearbox, whether you’re spraying wheat in Santa Fe or orchards in Río Negro.
About TEBSA and Our Agricultural Solutions
Since 1997, TEBSA has been a trusted name in Argentina, supplying farmers with high-quality agricultural gearboxes at a 50% cost advantage. Based in the heart of Argentina’s farming region, we understand the needs of local growers—from the Pampas’ soybean fields to Patagonia’s fruit farms. Our 100% quality guarantee and 24-hour technical support make us a reliable partner for your equipment needs.
The D21B/D21F is just one of our offerings. We also produce:
Rotary Cutter Gearboxes: Like the RC-61, perfect for mowing pastures or clearing land.
Fertilizer Spreader Gearboxes: For even nutrient distribution in large fields.
Post Hole Digger Gearboxes: Built for fencing or planting in tough soils.
Rotary Tiller Gearboxes: Ideal for soil prep in Argentina’s diverse terrains.
PTO Shafts: Durable links for tractors and implements.
Each product is crafted with materials like stainless steel, aluminum, or POM, using processes like forging, grinding, and heat treatment for unmatched strength. Whether you’re a small farmer or a large agribusiness, TEBSA’s range has you covered. Contact us to explore our full lineup or get a quote today!
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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

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