Excavators, especially crawler excavators, rely heavily on their undercarriage systems to operate efficiently and effectively across various terrains. Two critical components of this system are the track rollers and the carrier rollers. Understanding the differences between these components is essential for proper maintenance and operation. Yongxing Engineering, a manufacturer of premium excavator parts, offers thorough insights into the differences between these vital components.

Track Roller
Track rollers, also called bottom or lower rollers, are an integral part of the undercarriage systems of heavy machinery such as bulldozers and excavators. These components are essential for maintaining the stability, mobility, and superior performance of such equipment. By supporting the weight of the machinery and facilitating smooth movement across various terrains, track rollers ensure that these machines can operate effectively and efficiently in their intended environments. Track rollers guarantee that these machines can function effectively and efficiently in their intended environments because of their robust design and strategic placement.
Carrier Roller
Carrier rollers, often termed as upper or top rollers, are a vital component in the undercarriage system of tracked machines like excavators and bulldozers. Their main function is to aid in the efficient and seamless passage across the undercarriage by supporting and guiding the upper portion of the track. They are essential for keeping the track in the proper tension and alignment, guaranteeing peak performance, and extending the track system’s lifespan. By providing this essential support, carrier rollers safeguard the machinery’s stability and enhance its operational capabilities, making them a critical element in the overall design and functionality of heavy equipment.
Difference Between Track Rollers and Carrier Rollers
Track rollers and carrier rollers are essential components of a crawler excavator’s undercarriage system, but they differ greatly in terms of how they work, where they are located, and how they affect the machine’s performance.
Track Roller | Carrier Roller | |
Function | The primary function of track rollers is to support the weight of the excavator and guide the tracks as the machine moves. They absorb shock and impact, ensuring smooth and stable operation. | Carrier rollers’ main job is to keep the upper portion of the track from drooping by providing support. They increase machine stability and lessen track link wear. |
Placement | Track rollers are located at the bottom of the undercarriage, directly in contact with the tracks. They run along the ground and bear the machine’s weight. | Carrier rollers are positioned at the top of the undercarriage, supporting the upper section of the track.They don’t make direct touch with the earth. |
Impact on Operation | Track rollers have a significant impact on the excavator’s stability, weight distribution, and shock absorption. They are crucial for maintaining the machine’s balance and preventing derailment of the tracks. | Carrier rollers primarily impact the track’s tension and alignment, reducing wear and improving stability. Their role is more focused on maintaining the efficiency and longevity of the tracks. |
Importance of Quality Rollers
For an excavator to operate at its best, track roller and carrier roller quality are essential. We at Yongxing Engineering recognize the value of premium components. Our crawler excavator track rollers and mini excavator upper track rollers are manufactured to the highest standards, ensuring durability and reliability. Its China excavator track roller price list also offers affordable prices without sacrificing quality.
Trusted Supplier-Yongxing Engineering
Track rollers and carrier rollers are both essential components of a crawler excavator’s undercarriage system, each serving distinct and crucial functions. Maintaining the lifetime and performance of the excavator is made easier by being aware of the distinctions between these parts. At Yongxing Engineering, we provide high-quality crawler excavator track rollers and mini excavator upper track rollers to ensure that your machinery operates efficiently and effectively.
For more additional details on our offerings and costs, visit Yongxing Engineering.