| Customization: | Available |
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| Application: | Heavy Truck |
| Control System: | Pneumatic Control Unit |
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20JS240T-1701055 Countershaft Spline INT SFT KEY TONLY TL885 Mining Dump Truck Spare Parts Gearbox Transmission Countershaft Spline
Product Name: Countershaft Spline
Product Model: TONLY TL885
Product After Sales Service: 3 Months
Product Material: plastic
Product Origin: JINAN
Product Unit: PCS
Product Advantages: high-density, good performance, long service life.
The countershaft spline is a critical power-transmission feature machined directly onto the transmission's countershaft (also called the layshaft). Its primary function is to provide a permanent, high-strength connection between the shaft and the gears that are fixed to it, enabling the reliable transfer of engine torque through the gearbox.
Torque Transmission:
This is the spline's core purpose. The countershaft receives power from the input shaft. The spline connection transmits this rotational force and torque to the multiple gears that are permanently mounted on the countershaft. It does so without any slippage, ensuring efficient power flow.
Positive Drive and Location:
The spline provides a positive drive connection, meaning it locks the gears to the shaft in a specific circumferential position. This ensures that the gears rotate in perfect unison with the countershaft at all times.
High Load-Bearing Capacity:
The "spline" design-essentially a series of longitudinal "keys" and "keyways" machined into the shaft and gear bore-creates a much larger contact area compared to a single square key. This design is essential in heavy-duty trucks, as it is capable of withstanding the extreme torque and shock loads encountered in commercial vehicle operations.
Precision and Durability:
The spline ensures precise concentricity between the gears and the shaft, promoting smooth rotation and reducing vibration. Its robust design is built for longevity under constant stress.
Heavy-duty truck transmissions are designed for immense power and durability. A spline connection on the countershaft is fundamental to this for several reasons:
Reliability: It is one of the most robust methods for connecting rotating components, preventing catastrophic failures that could occur with weaker connections.
Efficiency: It minimizes power loss that could happen from slippage in a less secure connection.
Space Optimization: It allows for a compact design while still handling very high torque levels.
In summary, the countershaft spline acts as the indestructible link between the countershaft and its gears. It is the feature that allows the massive torque from a diesel engine to be reliably transmitted and divided among the different gear ratios within the transmission, making it a cornerstone of the drivetrain's strength and reliability.
Shandong Tongjia Supply Chain Management Co., Ltd. was established in 2002, and in 2014, it set up a subsidiary Jinan Perfect Power Auto Parts Co. specializes in the sale of heavy-duty trucks and truck parts. The company primarily focuses on distributing Sinotruk, Shacman, Foton truck parts, and various construction machinery components, offering over 200,000 distinct items. Shandong Tongjia emphasizes international trade, exporting goods to Africa, the Middle East, Southeast Asia, South America, Eastern Europe, and other global markets. The company has developed a dedicated and professional technical staff and sales team, establishing a comprehensive management system. Shandong Tongjia is committed to providing customers with high-quality and affordable products. Currently, its offerings are well-received both domestically and internationally, consistently earning praise from customers around the world.


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