As a professional mechanical power transmission parts manufacturer in China, Goodwill Transmission recently established long-term cooperation with one of the largest agricultural machinery manufacturers in Brazil.
The project involves large-volume production of precision V-belt pulleys, spline shafts, and internal spline cast iron gears used in heavy-duty agricultural machinery transmission systems.
After detailed technical discussions, sample development, testing, and product verification, our products successfully passed the customer’s strict performance and quality requirements, leading to stable long-term cooperation.
This cooperation once again demonstrates our capabilities as a China pulley manufacturer, China spline shaft supplier, and China cast iron gear manufacturer serving global agricultural equipment manufacturers.
Long-Term Cooperation with a Major Brazilian Agricultural Machinery Manufacturer
Agricultural machinery manufacturers require transmission components capable of operating under high loads, continuous vibration, dusty environments, and long working hours. Product durability, dimensional accuracy, and stable quality consistency are critical.
Although the customer in Brazil already had internal manufacturing capability for some transmission components, they still decided to cooperate with us after evaluating:
- Manufacturing cost advantages
- Product quality consistency
- Technical communication efficiency
- Export service support
- Large-volume production capability
- Engineering responsiveness
Even considering Brazil’s high import duties and complicated tax structure, our products still maintained strong cost competitiveness while meeting the customer’s strict technical standards.
Throughout the project development process, our engineering team worked closely with the customer to quickly solve drawing details, optimize manufacturing processes, and support product testing efficiently and professionally.
Precision V-Belt Pulleys for Agricultural Machinery
The V-belt pulleys supplied for this project are groove B pulleys designed for heavy-duty agricultural equipment transmission systems.
Pulley Material and Surface Treatment
The pulleys are manufactured using HT250 cast iron material, which provides:
- Excellent wear resistance
- Stable mechanical performance
- Good vibration damping capability
- Reliable operation under continuous load conditions
To improve corrosion resistance and surface appearance, the pulleys receive black phosphating surface treatment after machining and balancing processes.
Dynamic Balancing for Stable Transmission Performance
For agricultural machinery operating at high rotational speeds, pulley balancing is critical for reducing vibration and improving transmission efficiency.
All pulleys undergo dynamic balancing testing and correction before final inspection to ensure stable and reliable operation.
V-Belt Pulley Manufacturing Process
The manufacturing process includes:
- Sand casting mold production
- Casting pulley blanks
- Rough machining
- Groove machining
- Precision finishing
- Dynamic balancing testing and correction
- Black phosphating surface treatment
- Final dimensional and appearance inspection
As a professional China pulley manufacturer, we provide OEM V-belt pulleys for agricultural machinery manufacturers according to customer drawings and technical requirements.
Internal Spline Cast Iron Gears for Heavy-Duty Agricultural Equipment
The project also includes roller tooth internal spline cast iron gears used in agricultural machinery transmission systems.
Ductile Iron Gear Material
The customer specified GGG60 ductile iron material, and we used QT600 equivalent material in China to meet the required mechanical performance standards.
Compared with ordinary cast iron, ductile iron gears provide:
- Higher tensile strength
- Better impact resistance
- Improved fatigue performance
- More stable operation under heavy load conditions
In fact, most gear manufacturers mainly provide steel gears instead of ductile iron gears. Our extensive experience in casting and precision machining allows us to successfully produce demanding ductile iron gear components for large agricultural machinery manufacturers.
Gear Manufacturing Process
The manufacturing process for internal spline cast iron gears includes:
- Sand casting gear blanks
- Producing tooth profile and spline hole close to final dimensions during casting
- Removing risers and gates
- Grinding and deburring
- Sand blasting or shot blasting cleaning
- Rough machining
- Internal spline machining
- Gear tooth machining
- Deburring
- Final inspection
The gear module range for this project is module 1.75.
As a China cast iron gear manufacturer, we support OEM agricultural machinery gear production according to customer drawings and application requirements.
Precision Spline Shafts for Agricultural Machinery Transmission Systems
The spline shafts supplied for this project are manufactured using 34CrNiMo6 alloy steel, which is equivalent to SAE4340 material specified by the customer.
This material provides:
- Excellent toughness
- High fatigue resistance
- Outstanding mechanical strength
- Reliable torque transmission capability
Heat Treatment and Surface Hardening
To improve shaft durability and wear resistance, the spline shafts undergo:
- Quenching and tempering heat treatment
- Core hardness: HRC 30–35
- Salt bath nitriding and black oxidation treatment
- Nitriding depth: 0.1–0.3 mm
- Surface hardness: 55–62 HRC
These treatments significantly improve wear resistance and service life in demanding agricultural machinery applications.
Spline Shaft Manufacturing Process
The spline shaft production process includes:
- Cutting raw round steel material to required length
- Rough turning
- Quenching and tempering heat treatment
- Precision machining
- Deburring and chamfering
- Salt bath nitriding and black oxidation treatment
- Final inspection of spline dimensions, surface hardness, nitriding depth, and appearance quality
As a professional China spline shaft supplier, we provide customized spline shafts for agricultural machinery manufacturers and industrial OEM applications.
Strict Quality Control for Agricultural Machinery Transmission Components
To ensure stable product quality for large-volume production, we implement strict quality control procedures throughout manufacturing and inspection processes.
Our inspection capabilities include:
- Material certificates
- CMM dimensional inspection
- Dynamic balancing testing
- Runout inspection
- Hardness testing
- Surface quality inspection
We can also provide ISO certification documents according to customer requirements.
For agricultural machinery manufacturers, stable quality consistency and reliable supply capability are essential for long-term cooperation. Our manufacturing and quality management systems help ensure dependable product performance for demanding industrial applications.
OEM Agricultural Machinery Transmission Parts Manufacturer in China
With extensive experience in OEM manufacturing, precision casting, CNC machining, spline machining, and agricultural machinery transmission component production, Goodwill Transmission continues supporting global agricultural equipment manufacturers with high-quality customized products and professional engineering support.
This successful cooperation with a leading agricultural machinery manufacturer in Brazil further demonstrates our capability to provide:
- OEM agricultural machinery transmission parts
- Precision V-belt pulleys
- Internal spline cast iron gears
- Heat-treated spline shafts
- Large-volume production support
- Professional export service
For more information about custom agricultural machinery transmission components, please visit Goodwill Transmission Official Website or contact us at export@cd-goodwill.com.
FAQ
What materials are commonly used for agricultural machinery pulleys?
HT250 cast iron is widely used for agricultural machinery V-belt pulleys because of its excellent wear resistance, vibration damping capability, and stable mechanical performance.
Can ductile iron gears replace steel gears?
Yes. In many heavy-duty agricultural machinery applications, ductile iron gears provide excellent strength, fatigue resistance, and cost efficiency while maintaining stable transmission performance.
What is the Chinese equivalent material for SAE4340?
34CrNiMo6 is commonly used in China as an equivalent material to SAE4340 alloy steel.
Why is dynamic balancing important for V-belt pulleys?
Dynamic balancing helps reduce vibration, improve transmission stability, decrease bearing load, and extend equipment service life during high-speed operation.
What surface treatment is used for spline shafts?
The spline shafts in this project use salt bath nitriding and black oxidation treatment to improve surface hardness, wear resistance, and corrosion resistance.
Post time: Jun-02-2026
