Reliable Sealing for Gearbox Protection
Effective sealing is essential for maintaining gearbox performance. We have been manufacturing gearbox components since 2011 and have supplied similar assembly parts to Sany Heavy Industry, known for its strict requirements in sealing and precision.
This Transmission End Cover is designed for automotive gearboxes, where it retains lubricating oil and protects internal components from contamination. It also supports bearing positioning within the assembly.
The component is typically made from HT250 cast iron. For applications requiring reduced weight, aluminum ADC12 is also available. The end face is precisely machined, with flatness controlled within 0.03 mm to ensure effective sealing and prevent oil leakage.
Precision Manufacturing – Backed by Data
With over 40 CNC lathes and machining centers, we ensure consistent high-precision production.
The bearing bore is machined to IT7 grade, while hole position tolerance is maintained within ≤0.05 mm.
Surface roughness is controlled at Ra ≤ 1.6 μm, improving sealing performance and ensuring proper contact with oil seals.
This Transmission End Cover is suitable for rotational speeds up to 8000 r/min and operates reliably within a temperature range of -40°C to 150°C.
Material options include HT250, QT450-10, and ADC12 aluminum to meet different application requirements.

Versatile Design for Automotive Applications
We provide more than components-we deliver reliable solutions tailored to your needs.
This Transmission End Cover features an O-ring groove and an oil seal mounting position to enhance sealing performance.
It is suitable for a wide range of vehicles, including sedans, light trucks, and heavy trucks, and can be customized according to your specifications.
Installation is completed via bolt fastening, allowing for easy integration into your system.
With over a decade of experience since 2011, we are committed to delivering dependable products that support long-term gearbox performance.

Core Parameters
|
Parameter |
Specification / Range |
|
Material |
HT250 / QT450-10 / Aluminum ADC12 |
|
Working Temperature |
-40°C to 150°C |
|
End Face Flatness |
≤0.03 mm |
|
Bearing Hole Accuracy |
IT7 Grade |
|
Hole Position Tolerance |
≤0.05 mm |
|
Surface Roughness |
Ra ≤ 1.6 μm |
|
Seal Structure |
O-ring Groove / Oil Seal Mounting Position |
|
Installation Method |
Bolt Fastening |
|
Applicable Speed |
≤8000 r/min |
|
Applicable Range |
Sedan, Light Truck, Heavy Truck Gearbox Assemblies |
Hot Tags: transmission end cover, China transmission end cover manufacturers, suppliers, factory













