China HITACHI EX100 EX120-1 TRAVEL DEVICE PROPELLER SHAFT FINAL DRIVE PUMP TO HUB 21T | Tonkee®

The propeller shaft, in general, is a crucial part of the final drive system in heavy machinery like excavators.

Its primary function is to transfer torque and power from the hydraulic motor, often driven by the machine's engine, to the wheel or track hub. This transfer of power is essential for the machine's locomotion. The 21-tooth propeller shaft specifically refers to a shaft with 21 teeth or splines, which helps ensure a secure and efficient connection between the hydraulic pump and the hub.

The Hitachi EX100 and EX120-1 models are known for their robust hydraulic systems, which provide the necessary force to drive the excavator's tracks or wheels. The final drive system, of which the propeller shaft is an integral part, is designed to handle the substantial loads and stresses associated with excavation and construction tasks. The 21-tooth design of this propeller shaft is chosen for its ability to transmit high levels of torque effectively.

In practical terms, the 21-tooth propeller shaft connects to the output shaft of the hydraulic pump on one end and to the hub on the other end.

The teeth or splines on the shaft engage with corresponding teeth or splines within these components, creating a secure and precise linkage. This connection ensures that power from the hydraulic pump is efficiently transferred to the hub, which, in turn, drives the excavator's movement.

The choice of 21 teeth for this propeller shaft is a result of engineering considerations. The number of teeth or splines is carefully selected to balance factors such as torque transmission, load-bearing capacity, and durability. It's a design that optimizes the performance of the travel device, enhancing the excavator's overall efficiency and productivity on the job site.

Maintenance of the propeller shaft and the entire final drive system is essential to ensure the longevity and reliability of the excavator. Regular inspections, lubrication, and replacement of worn components, including the propeller shaft, are part of routine maintenance practices. Choosing high-quality replacement parts, such as the Tonkee® propeller shaft designed specifically for Hitachi EX100 and EX120-1 models, is crucial to maintaining the excavator's performance and minimizing downtime.

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