The Carrier Roller, also known as Top Roller or Upper Roller, is installed above the track frame of the crawler excavator.
Unlike the lower track rollers, which directly carry the machine weight, the carrier roller supports and guides the upper section of the track chain. It helps maintain correct track chain position and reduces friction between the moving track chain and undercarriage frame.
For a 30-35 ton class excavator such as the Caterpillar E330, the carrier roller operates under continuous vibration, track-chain loading and demanding working conditions.
A worn or damaged carrier roller may result in:
Our E330 carrier rollers are manufactured using professional undercarriage production processes to provide a reliable aftermarket replacement solution for equipment dealers, distributors, repair workshops and fleet operators.
Designed for Caterpillar E330 excavators and suitable for demanding:
applications.
Manufactured from:
40Mn2 Alloy Steel
The material provides:
The roller body and working surfaces undergo controlled heat treatment to improve wear resistance and durability.
Typical specification:
This helps the carrier roller withstand continuous contact with the track chain under demanding operating conditions.
Equipped with:
The sealed structure helps retain lubricant and protect internal components against:
Manufactured with controlled:
Designed as a bolt-on replacement when the correct configuration is selected.
| Item | Specification / Detail |
|---|---|
| Product Type | Excavator Undercarriage Carrier Roller |
| Machine Model | Caterpillar E330 |
| Compatible Models | E330 |
| Machine Type | Crawler Excavator |
| Machine Class | Approx. 30-35 Ton |
| OEM Part Number | Confirm by machine serial number |
| Material Grade | 40Mn2 Alloy Steel |
| Manufacturing Process | Forging / Casting + CNC Machining |
| Heat Treatment | Induction Hardening |
| Surface Hardness | HRC 52-58 |
| Hardening Depth | 8mm-12mm |
| Seal System | Heavy-duty Floating Oil Seal |
| Lubrication System | Lifetime Internal Lubrication |
| Bearing Structure | Hardened Shaft + Wear-resistant Bushing |
| Quality Inspection | Dimension, Hardness and Sealing Inspection |
| Flange Type | Single Flange / Double Flange |
| Installation | OEM-Style, Bolt-on Direct Replacement |
| Application | Construction / Mining / Earthmoving |
| Shipping Note | Heavy Component — Sea Freight Recommended |
The Carrier Roller, also known as Top Roller or Upper Roller, is installed above the track frame of the crawler excavator.
Unlike the lower track rollers, which directly carry the machine weight, the carrier roller supports and guides the upper section of the track chain. It helps maintain correct track chain position and reduces friction between the moving track chain and undercarriage frame.
For a 30-35 ton class excavator such as the Caterpillar E330, the carrier roller operates under continuous vibration, track-chain loading and demanding working conditions.
A worn or damaged carrier roller may result in:
Our E330 carrier rollers are manufactured using professional undercarriage production processes to provide a reliable aftermarket replacement solution for equipment dealers, distributors, repair workshops and fleet operators.
Designed for Caterpillar E330 excavators and suitable for demanding:
applications.
Manufactured from:
40Mn2 Alloy Steel
The material provides:
The roller body and working surfaces undergo controlled heat treatment to improve wear resistance and durability.
Typical specification:
This helps the carrier roller withstand continuous contact with the track chain under demanding operating conditions.
Equipped with:
The sealed structure helps retain lubricant and protect internal components against:
Manufactured with controlled:
Designed as a bolt-on replacement when the correct configuration is selected.
| Item | Specification / Detail |
|---|---|
| Product Type | Excavator Undercarriage Carrier Roller |
| Machine Model | Caterpillar E330 |
| Compatible Models | E330 |
| Machine Type | Crawler Excavator |
| Machine Class | Approx. 30-35 Ton |
| OEM Part Number | Confirm by machine serial number |
| Material Grade | 40Mn2 Alloy Steel |
| Manufacturing Process | Forging / Casting + CNC Machining |
| Heat Treatment | Induction Hardening |
| Surface Hardness | HRC 52-58 |
| Hardening Depth | 8mm-12mm |
| Seal System | Heavy-duty Floating Oil Seal |
| Lubrication System | Lifetime Internal Lubrication |
| Bearing Structure | Hardened Shaft + Wear-resistant Bushing |
| Quality Inspection | Dimension, Hardness and Sealing Inspection |
| Flange Type | Single Flange / Double Flange |
| Installation | OEM-Style, Bolt-on Direct Replacement |
| Application | Construction / Mining / Earthmoving |
| Shipping Note | Heavy Component — Sea Freight Recommended |
