The Track Roller — also known as Bottom Roller or Lower Roller — is a critical load-bearing component installed under the track frame of Komatsu PC300 crawler excavators.
For a 30-ton class excavator, each track roller operates under extremely high static and dynamic loads. It supports machine weight, guides the track chain and distributes ground pressure evenly during digging, loading and travelling operations.
During operation, the roller is exposed to:
A worn or damaged track roller may cause:
Our Komatsu PC300 track rollers are manufactured according to original dimensional requirements, providing reliable aftermarket replacement solutions for construction, mining and earthmoving applications.
Designed for Komatsu PC300 crawler excavators, including:
Available configurations:
to match different installation positions on the track frame.
Manufactured from high-strength:
40Mn2 / 50Mn alloy steel
with excellent:
The roller tread surface is induction hardened:
providing excellent wear resistance under harsh working conditions.
Equipped with:
to prevent:
Manufactured according to OEM drawings with:
No additional modification required.
| Item | Specification / Detail |
|---|---|
| Machine Model | Komatsu PC300 Excavator |
| Compatible Models | PC300 / PC300LC / PC300-5 / PC300-6 / PC300-7 / PC300-8 |
| Part Type | Track Roller (Bottom Roller / Lower Roller) |
| OEM Part Number | 207-30-00150 / 207-30-00650 / 207-30-00660 (Confirm by serial number) |
| Flange Type | Single Flange (SF) / Double Flange (DF) |
| Material | High-strength 40Mn2 / 50Mn 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, mining and earthmoving operations |
| Shipping Note | Heavy component — sea freight recommended |
For a 30-ton class excavator like Komatsu PC300, undercarriage components represent a major maintenance cost. High-quality track rollers directly affect machine stability, travelling performance and overall operating cost.
A reliable track roller helps:
Every roller produced by our factory is inspected through:
With professional manufacturing capability for excavator undercarriage parts, we provide OEM-compatible 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 load-bearing component installed under the track frame of Komatsu PC300 crawler excavators.
For a 30-ton class excavator, each track roller operates under extremely high static and dynamic loads. It supports machine weight, guides the track chain and distributes ground pressure evenly during digging, loading and travelling operations.
During operation, the roller is exposed to:
A worn or damaged track roller may cause:
Our Komatsu PC300 track rollers are manufactured according to original dimensional requirements, providing reliable aftermarket replacement solutions for construction, mining and earthmoving applications.
Designed for Komatsu PC300 crawler excavators, including:
Available configurations:
to match different installation positions on the track frame.
Manufactured from high-strength:
40Mn2 / 50Mn alloy steel
with excellent:
The roller tread surface is induction hardened:
providing excellent wear resistance under harsh working conditions.
Equipped with:
to prevent:
Manufactured according to OEM drawings with:
No additional modification required.
| Item | Specification / Detail |
|---|---|
| Machine Model | Komatsu PC300 Excavator |
| Compatible Models | PC300 / PC300LC / PC300-5 / PC300-6 / PC300-7 / PC300-8 |
| Part Type | Track Roller (Bottom Roller / Lower Roller) |
| OEM Part Number | 207-30-00150 / 207-30-00650 / 207-30-00660 (Confirm by serial number) |
| Flange Type | Single Flange (SF) / Double Flange (DF) |
| Material | High-strength 40Mn2 / 50Mn 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, mining and earthmoving operations |
| Shipping Note | Heavy component — sea freight recommended |
For a 30-ton class excavator like Komatsu PC300, undercarriage components represent a major maintenance cost. High-quality track rollers directly affect machine stability, travelling performance and overall operating cost.
A reliable track roller helps:
Every roller produced by our factory is inspected through:
With professional manufacturing capability for excavator undercarriage parts, we provide OEM-compatible 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.
