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Komatsu D20 Bottom Track Roller Excavator Undercarriage Parts for Sale With Heavy Duty Forged Steel

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

Conquer Rocky Terrain & Slash Costs on Your D20

Tired of your D20 suffering from:

• Premature roller failure on harsh, rocky ground?
• Spiraling maintenance bills as hours climb?
• Profit-killing unplanned downtime?

Upgrade to Our D20 Rollers for Proven Results & ROI:

• ✅ Save 22% on Fuel: Advanced design delivers significantly lower rolling resistance.
• ✅ Perfect Komatsu Fit: Direct interchange with 70G-75-21100 rollers - installs seamlessly.
• ✅ Unmatched Durability: Built tough with premium alloys, backed by a robust 3-Year Structural Warranty.

Unstoppable Traction & Uptime Start Here:

Factory-Direct Pricing | ISO 9001 Certified Quality | Global Logistics Network

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