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Komatsu Track Bottom Roller PC300-8 Factory Direct Heavy Duty Undercarriage Replacement Parts

1. What is a track roller?

As the backbone of excavator undercarriage systems, track rollers bear the full weight of the machine while enduring extreme ground impacts. Accounting for over 70% of operational resistance, their quality directly determines undercarriage longevity and machine efficiency. Unlike conventional welded rollers prone to structural failure, our friction-welded rollers utilize advanced metallurgical bonding to create seamless, ultra-durable assemblies – delivering 35% longer service life than industry standards.

2. Engineering Excellence: Why Our Track Rollers Dominate Severe Conditions

✅ Military-Grade Sealing Integrity

Every roller undergoes 0.6Mpa pressurized gas testing – exceeding OEM specifications to eliminate oil leakage and guarantee 10,000+ hour lifespans in mud, sand, and abrasive environments.

✅ Forged Alloy Armor Defense

Precision-forged shells undergo deep-case hardening and quench-tempering treatments, achieving:

• Rockwell 60-65 HRC surface hardness
• 450MPa+ tensile strength
• riple-layer chrome plating on shafts

✅ Battle-Proven Load Capacity

Re-engineered internal raceways and tapered bearings distribute load forces 30% more efficiently, preventing:

• Premature flange wear
• Bending deformation under cyclical load

✅ Genuine Komatsu DNA

Direct-from-factory components include:

• 100% OEM-matched dimensions

• Forged alloy steel certified to JIS G4051

• raceable heat batch documentation

3. The Cost-Smart Solution for Mining & Heavy Earthmoving

When your PC300-8 faces:
⚠️ Rocky terrain degradation
⚠️ High-hour maintenance costs
⚠️ Unplanned downtime

Our rollers deliver field-proven ROI:
➤ 22% lower rolling resistance = reduced fuel consumption
➤ Interchangeable with Komatsu 70G-75-21100
➤ 3-Year structural warranty

Replace Weakness with Unstoppable Traction
Factory-direct pricing | ISO 9001 certified manufacturing | Global logistics support

4. Production Processes

5. Track Roller Structure

6. Design/Structure/Main Dimensions of Installation

7. Our Advantages 

* World-class quality

* Factory sale directly with reasonable price

* 35 years experience in Excavator & Bulldozer spare parts manufacturing

* Flexible payment terms including T/T, L/C and so on

* Fast delivery within 30 days after contract established

* Professional sales team, quality inspection, and report, maritime logistics guidance

* After-sale services: video technical support,24h online support

8. Hot Sale Products