Product Specifications
Hitachi excavator (YA60024620)-ZX240-carrier/top roller assembly-China carrier roller supply
Excavator Carrier Roller: Overview & Key Details
The carrier roller (also called an upper roller) is a critical part of an excavator’s undercarriage system, supporting the weight of the machine and guiding the track chain along its path.
1. Functions of a Carrier Roller
- Supports Machine Weight: Helps distribute the excavator’s load evenly across the track.
- Guides the Track Chain: Keeps the track aligned and prevents lateral movement.
- Reduces Friction: Minimizes wear on the track links and other undercarriage components.
2. Types of Carrier Rollers
| Type | Description |
|---|---|
| Single-Flange | Has one raised edge to prevent track slippage (common in most excavators). |
| Double-Flange | Features flanges on both sides for extra track stability (used in high-stress conditions). |
| Non-Flanged | Smooth design, used in specific applications where lateral movement is minimal. |
| Sealed & Lubricated | Contains internal grease for longer lifespan (common in modern machines). |
3. Signs of a Worn-Out Carrier Roller
✔ Excessive Play or Wobble (bearing failure)
✔ Visible Wear or Flat Spots on the roller surface
✔ Track Misalignment or Derailment
✔ Grinding or Squeaking Noises while moving
✔ Grease Leaks (indicates seal damage)
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