The Track Roller — also known as Bottom Roller or Lower Roller — is a critical undercarriage component installed beneath the track frame of Caterpillar CAT E312 crawler excavators.
The bottom roller carries the machine operating weight, supports the track chain and maintains correct crawler alignment during travelling and excavation operations.
For a 12-ton class excavator, the track roller operates under demanding conditions:
A worn or damaged track roller may cause:
Our CAT E312 track rollers are manufactured according to OEM-style drawings, providing reliable aftermarket replacement solutions for construction contractors, equipment dealers and repair workshops.
Designed for:
Reference OEM numbers:
Available configurations:
Suitable for different positions on the track frame.
Manufactured from:
40Mn2 Alloy Steel
Advantages:
The roller tread surface is induction hardened:
Improves resistance against:
Equipped with:
Designed to prevent:
Manufactured with:
Provides direct bolt-on replacement without modification.
| Item | Specification / Detail |
|---|---|
| Machine Model | Caterpillar CAT E312 Excavator |
| Compatible Models | E312 / 312 / 312B / 312BL / E120B |
| Machine Class | 12 Ton Excavator |
| Part Type | Track Roller (Bottom Roller / Lower Roller) |
| OEM Part Number | 4I7346 / 861934 / 151-9747 / CR5108 |
| Flange Type | Single Flange (SF) / Double Flange (DF) |
| Material | High-strength 40Mn2 Alloy Steel |
| Manufacturing Method | Forging / Casting / Machining |
| Surface Hardness | HRC 52-58 |
| Hardening Depth | 5mm - 10mm |
| Sealing | Heavy-duty floating oil seal, lifetime lubricated |
| Mounting | OEM standard, bolt-on direct replacement |
| Application | Construction, earthmoving and excavation operations |
| Shipping Note | Heavy component — sea freight recommended |
For a 12-ton class excavator like CAT E312, undercarriage components directly affect machine stability, travelling performance and operating cost.
A reliable 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 Caterpillar CAT E312 crawler excavators.
The bottom roller carries the machine operating weight, supports the track chain and maintains correct crawler alignment during travelling and excavation operations.
For a 12-ton class excavator, the track roller operates under demanding conditions:
A worn or damaged track roller may cause:
Our CAT E312 track rollers are manufactured according to OEM-style drawings, providing reliable aftermarket replacement solutions for construction contractors, equipment dealers and repair workshops.
Designed for:
Reference OEM numbers:
Available configurations:
Suitable for different positions on the track frame.
Manufactured from:
40Mn2 Alloy Steel
Advantages:
The roller tread surface is induction hardened:
Improves resistance against:
Equipped with:
Designed to prevent:
Manufactured with:
Provides direct bolt-on replacement without modification.
| Item | Specification / Detail |
|---|---|
| Machine Model | Caterpillar CAT E312 Excavator |
| Compatible Models | E312 / 312 / 312B / 312BL / E120B |
| Machine Class | 12 Ton Excavator |
| Part Type | Track Roller (Bottom Roller / Lower Roller) |
| OEM Part Number | 4I7346 / 861934 / 151-9747 / CR5108 |
| Flange Type | Single Flange (SF) / Double Flange (DF) |
| Material | High-strength 40Mn2 Alloy Steel |
| Manufacturing Method | Forging / Casting / Machining |
| Surface Hardness | HRC 52-58 |
| Hardening Depth | 5mm - 10mm |
| Sealing | Heavy-duty floating oil seal, lifetime lubricated |
| Mounting | OEM standard, bolt-on direct replacement |
| Application | Construction, earthmoving and excavation operations |
| Shipping Note | Heavy component — sea freight recommended |
For a 12-ton class excavator like CAT E312, undercarriage components directly affect machine stability, travelling performance and operating cost.
A reliable 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.
