China HITACHI EX100 120-1-2-3-5 BOLT HOLDING BOTTOM ROLLER (OEM HI 4227029) | Tonkee®

First and foremost, the bottom roller is an integral part of the excavator's undercarriage system.

The undercarriage is the lower portion of the machine that includes components like tracks, rollers, and idlers, and it plays a vital role in supporting the weight of the excavator and distributing it evenly across the tracks. The bottom roller specifically helps to guide and support the track as it moves along the ground, providing stability and control to the machine.

The construction of this bottom roller is typically made from high-strength materials such as steel or other durable alloys. These materials are chosen for their ability to withstand heavy loads, abrasive terrain, and the wear and tear that excavators encounter during their operation. Additionally, the roller's surface is usually hardened to resist wear and extend its operational life, ensuring longevity and reliability in demanding construction environments.

The OEM designation (Original Equipment Manufacturer) HI 4227029 signifies that this bottom roller is manufactured by Hitachi, the original equipment manufacturer of the excavator. This ensures that the component is designed to meet the manufacturer's specifications and quality standards, guaranteeing compatibility and optimal performance with Hitachi EX100 and EX120 series excavators.

One of the key functions of the bolt holding bottom roller is to maintain proper track tension.

Proper track tension is essential for the excavator's stability and maneuverability. This roller, along with other undercarriage components, helps to keep the tracks tensioned correctly, preventing issues like track slippage and excessive wear. Maintaining the right track tension is crucial for the efficient and safe operation of the machine.

Installation of the bottom roller involves securely attaching it to the excavator's undercarriage using the provided bolt holding mechanism. The bolt holding design ensures that the roller remains firmly in place, even in challenging working conditions where vibrations and shocks are common. This secure attachment minimizes the risk of the roller becoming dislodged during operation, which could result in significant downtime and potential safety hazards.

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