The Carrier Roller, also known as Top Roller or Upper Roller, is mounted above the track frame of Hitachi EX100 and EX120 crawler excavators.
Its primary function is to support the upper section of the track chain and maintain correct track alignment during travelling. The carrier roller also helps reduce friction between the track chain and undercarriage frame.
A worn or seized carrier roller may cause:
Our EX100 / EX120 carrier rollers are manufactured using professional undercarriage production processes and provide a reliable aftermarket replacement solution for equipment dealers, distributors, repair workshops and fleet operators.
Designed for compatible:
The exact fitment should be confirmed according to machine serial number and existing undercarriage configuration.
Manufactured from:
40Mn2 Alloy Steel
Providing:
The roller working surface is subjected to controlled heat treatment.
Typical specification:
This improves resistance to continuous track-chain contact and abrasive working environments.
Equipped with:
The sealed structure helps retain lubricant and protect internal components against dust, mud and water contamination.
Manufactured with controlled:
Designed for bolt-on replacement when the correct configuration is selected.
| Item | Specification / Detail |
|---|---|
| Product Type | Excavator Undercarriage Carrier Roller |
| Machine Models | Hitachi EX100 / EX120 |
| Machine Type | Crawler Excavator |
| Machine Class | Approx. 10-12 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 | 5mm-10mm |
| 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 |
| Mounting Configuration | OEM Standard |
| Installation | Bolt-on Direct Replacement |
| Application | Construction / Earthmoving |
| Shipping Note | Heavy Component — Sea Freight Recommended |
The Carrier Roller, also known as Top Roller or Upper Roller, is mounted above the track frame of Hitachi EX100 and EX120 crawler excavators.
Its primary function is to support the upper section of the track chain and maintain correct track alignment during travelling. The carrier roller also helps reduce friction between the track chain and undercarriage frame.
A worn or seized carrier roller may cause:
Our EX100 / EX120 carrier rollers are manufactured using professional undercarriage production processes and provide a reliable aftermarket replacement solution for equipment dealers, distributors, repair workshops and fleet operators.
Designed for compatible:
The exact fitment should be confirmed according to machine serial number and existing undercarriage configuration.
Manufactured from:
40Mn2 Alloy Steel
Providing:
The roller working surface is subjected to controlled heat treatment.
Typical specification:
This improves resistance to continuous track-chain contact and abrasive working environments.
Equipped with:
The sealed structure helps retain lubricant and protect internal components against dust, mud and water contamination.
Manufactured with controlled:
Designed for bolt-on replacement when the correct configuration is selected.
| Item | Specification / Detail |
|---|---|
| Product Type | Excavator Undercarriage Carrier Roller |
| Machine Models | Hitachi EX100 / EX120 |
| Machine Type | Crawler Excavator |
| Machine Class | Approx. 10-12 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 | 5mm-10mm |
| 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 |
| Mounting Configuration | OEM Standard |
| Installation | Bolt-on Direct Replacement |
| Application | Construction / Earthmoving |
| Shipping Note | Heavy Component — Sea Freight Recommended |
