OEM HITACHI EX200-5 TRAVEL DEVICE FINAL DRIVE NEEDLE ROLLER BEARING PLANETARY 1 (OEM HI 4210849) | Tonkee®

The needle roller bearing is a type of rolling-element bearing that consists of long, thin cylindrical rollers with a small diameter.

These rollers are arranged in a parallel fashion within the bearing, allowing for efficient load distribution and reduced friction during operation. The design of needle roller bearings is particularly suitable for applications with high radial load requirements, as is often the case in heavy machinery like excavators.

The primary function of the planetary bearing in the final drive assembly is to support and facilitate the rotation of the planetary gears. Planetary gears are a set of gears that work together in a unique arrangement, with one or more gears rotating around a central sun gear while being surrounded by an outer ring gear. This configuration allows for high torque output and load distribution, making it ideal for heavy-duty applications.

In the context of the Hitachi EX200-5 excavator, the planetary 1 bearing within the final drive assembly ensures smooth and efficient power transfer from the hydraulic motor to the excavator's tracks. As the hydraulic motor generates rotational force, this force is transmitted to the planetary gears, which, in turn, drive the excavator's tracks. The needle roller bearings within the planetary 1 assembly provide low-friction support for the gears, reducing wear and tear and ensuring reliable operation.

The OEM designation "HI 4210849" indicates that this needle roller bearing is a genuine, original equipment manufacturer (OEM) part produced by Hitachi specifically for use in the EX200-5 excavator model.

OEM parts are designed and manufactured to meet the exact specifications and quality standards set by the original equipment manufacturer, ensuring compatibility and optimal performance.

It is essential to use OEM parts like the HI 4210849 needle roller bearing when performing maintenance or repairs on heavy machinery like the Hitachi EX200-5 excavator. Using genuine OEM components helps maintain the equipment's reliability, durability, and overall performance. Substituting with non-OEM or aftermarket parts may compromise the machine's efficiency and potentially lead to costly breakdowns.

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