The Track Roller — also known as Bottom Roller or Lower Roller — is a critical undercarriage component installed beneath the track frame of JCB JS330 crawler excavators.
The bottom roller carries a large proportion of the machine operating weight, supports the track chain and maintains correct crawler alignment during travelling and excavation operations.
For a 33-ton class excavator, the roller works under severe conditions:
A worn or damaged track roller may cause:
Our JCB JS330 track rollers are manufactured according to OEM-style drawings and heavy-duty production standards, providing reliable aftermarket replacement solutions for construction contractors, equipment dealers and mining applications.
Designed for:
Reference OEM numbers:
Available configurations:
Suitable for different positions on the track frame.
Manufactured from:
40Mn2 / 50Mn Alloy Steel
Advantages:
The roller tread surface is induction hardened:
Improves resistance against:
Equipped with:
Designed to prevent:
Manufactured with:
Provides direct bolt-on installation without modification.
| Item | Specification / Detail |
|---|---|
| Machine Model | JCB JS330 Excavator |
| Compatible Models | JS330 / JS330LC / JS330NLC |
| Machine Class | 33 Ton Excavator |
| Part Type | Track Roller (Bottom Roller / Lower Roller) |
| OEM Part Number | 331/43219 / 331/35386 / 331/43853 / 331/42460 |
| Flange Type | Single Flange (SF) / Double Flange (DF) |
| Material | High-strength 40Mn2 / 50Mn Alloy Steel |
| Manufacturing Method | Forging / Casting / Precision Machining |
| Surface Hardness | HRC 52-58 |
| Hardening Depth | 8mm - 12mm |
| Sealing | Heavy-duty floating oil seal, lifetime lubricated |
| Mounting | OEM standard, bolt-on direct replacement |
| Application | Heavy construction, mining and earthmoving |
| Shipping Note | Heavy component — sea freight recommended |
For a 33-ton class excavator like JCB JS330, undercarriage reliability directly affects machine productivity and operating cost.
A high-quality track roller helps:
Every roller produced by our factory undergoes strict quality inspection:
With professional manufacturing capability for excavator undercarriage parts, we provide OEM-compatible replacement solutions with stable quality, competitive pricing and warranty support.
Contact us with your machine model, serial number, OEM part number and roller position to confirm the correct replacement.
The Track Roller — also known as Bottom Roller or Lower Roller — is a critical undercarriage component installed beneath the track frame of JCB JS330 crawler excavators.
The bottom roller carries a large proportion of the machine operating weight, supports the track chain and maintains correct crawler alignment during travelling and excavation operations.
For a 33-ton class excavator, the roller works under severe conditions:
A worn or damaged track roller may cause:
Our JCB JS330 track rollers are manufactured according to OEM-style drawings and heavy-duty production standards, providing reliable aftermarket replacement solutions for construction contractors, equipment dealers and mining applications.
Designed for:
Reference OEM numbers:
Available configurations:
Suitable for different positions on the track frame.
Manufactured from:
40Mn2 / 50Mn Alloy Steel
Advantages:
The roller tread surface is induction hardened:
Improves resistance against:
Equipped with:
Designed to prevent:
Manufactured with:
Provides direct bolt-on installation without modification.
| Item | Specification / Detail |
|---|---|
| Machine Model | JCB JS330 Excavator |
| Compatible Models | JS330 / JS330LC / JS330NLC |
| Machine Class | 33 Ton Excavator |
| Part Type | Track Roller (Bottom Roller / Lower Roller) |
| OEM Part Number | 331/43219 / 331/35386 / 331/43853 / 331/42460 |
| Flange Type | Single Flange (SF) / Double Flange (DF) |
| Material | High-strength 40Mn2 / 50Mn Alloy Steel |
| Manufacturing Method | Forging / Casting / Precision Machining |
| Surface Hardness | HRC 52-58 |
| Hardening Depth | 8mm - 12mm |
| Sealing | Heavy-duty floating oil seal, lifetime lubricated |
| Mounting | OEM standard, bolt-on direct replacement |
| Application | Heavy construction, mining and earthmoving |
| Shipping Note | Heavy component — sea freight recommended |
For a 33-ton class excavator like JCB JS330, undercarriage reliability directly affects machine productivity and operating cost.
A high-quality track roller helps:
Every roller produced by our factory undergoes strict quality inspection:
With professional manufacturing capability for excavator undercarriage parts, we provide OEM-compatible replacement solutions with stable quality, competitive pricing and warranty support.
Contact us with your machine model, serial number, OEM part number and roller position to confirm the correct replacement.
