Hyundai track roller(81E70015，81E700631)R500-R360-R450/Bottom roller ass’y/China track roller manufacture/CQC-track roller factory

Hyundai track roller(81E70015，81E700631)R500-R360-R450/Bottom roller ass’y/China track roller manufacture/CQC-track roller factory

A track roller (also known as an under-carriage roller) is a critical component in the undercarriage system of tracked heavy equipment, such as excavators, bulldozers, and crawler loaders. Its primary function is to support the machine’s weight and guide the track chain as it moves around the track frame.

Functions of a Track Roller:

1. Supports Machine Weight – Distributes the load evenly across the track.
2. Guides the Track Chain – Ensures smooth movement of the track.
3. Reduces Friction – Minimizes wear on the track links and bushings.
4. Absorbs Shock – Helps dampen vibrations and impacts from rough terrain.

Types of Track Rollers:

1. Bottom Rollers (Lower Rollers) – Carry the machine’s weight and roll along the inner track surface.
2. Top Rollers (Upper Rollers) – Support the track’s return section and prevent excessive sagging.
3. Flanged Rollers – Have flanges to prevent track misalignment.
4. Double Flange Rollers – Provide extra stability for high-stress applications.

Common Materials & Construction:

• Hardened Steel – For durability and wear resistance.
• Sealed & Lubricated Bearings – To extend service life in harsh conditions.
• Rubber-Coated Rollers (in some models) – For reduced noise and vibration.

Signs of a Worn-Out Track Roller:

• Excessive track sag or misalignment.
• Unusual noises (grinding, squeaking).
• Visible wear, cracks, or flat spots on the roller.
• Oil leaks from damaged seals.

Maintenance Tips:

• Regularly clean debris from the undercarriage.
• Inspect rollers for wear and lubrication.
• Replace worn rollers promptly to avoid track damage.