Komatsu Track Roller

Ensure maximum chassis stability and long service life with precision-engineered Komatsu track rollers from ShengAn. Designed for demanding mining, quarrying, and civil earthmoving projects, our Komatsu bottom rollers (lower rollers) deliver exceptional load-bearing capacity, precise rail alignment, and maximum resistance against harsh abrasive ground conditions.

Available in both single-flange and double-flange configurations, our lower rollers are precision-forged from high-density alloy steel, deep induction-hardened, and equipped with lifetime dual-cone floating seals. Whether you operate compact PC-series mini excavators or heavy D-series dozers, we supply direct OEM-fit replacement rollers at competitive factory wholesale prices.

The Engineering Behind Our Komatsu Undercarriage Solutions

Komatsu’s specialized X-frame track design and high-torque travel motors place immense radial and lateral loads onto lower rollers. Generic aftermarket parts often suffer from shell collapse, pin galling, or oil leakage under these specific mechanical strains.
Our engineering process eliminates these vulnerabilities through targeted metallurgical enhancements tailored for Komatsu chassis dynamics:

• Thick-Wall Forged Alloy Construction: Manufactured using high-density 40Mn2 forged steel with reinforced wall thickness, effectively preventing shell mushrooming, flange cracking, and impact deformation under max tonnage loads.
• High-Frequency Induction Quenching: Unlike basic surface hardening, our specialized heat-treatment process creates an extended hardened case depth (HRC 52–58 up to 12mm), allowing the tread surface to resist relentless abrasive wear while maintaining core ductility to handle high-G shock loads.
• Micro-Lapped Mirror Oil Seals: Equipped with dual-cone floating seals featuring micro-lapped metal rings and oil-resistant synthetic rubbers, maintaining zero-leak fluid retention even under sub-zero or high-temperature operating conditions.
• Heavy-Load Bronze Journal Bearings: Precision-bored bronze bushings paired with induction-treated steel pins reduce internal rotating resistance, minimizing temperature spikes during continuous long-distance track travel.

Built for Heavy-Duty Applications

Our Komatsu excavator bottom roller are manufactured using premium materials and advanced production technology to ensure long-lasting performance under harsh working conditions.

Key features include:

• High-strength forged alloy steel
• Precision-machined roller body and shaft
• Advanced heat treatment for superior hardness
• Heavy-duty floating seal system
• Long-life internal lubrication
• Excellent resistance to wear, impact, mud, and dust
• Reduced maintenance requirements

These features help minimize downtime, lower operating costs, and improve the reliability of your excavator undercarriage. Genuine Komatsu undercarriage systems also emphasize optimized heat treatment, lubrication, and durable sealing for extended service life.

Key Metallurgical & Structural Specifications

Broad Model Compatibility (Dash-6, Dash-7, Dash-8 & Modern Series)

We maintain an extensive, ready-to-ship stock of single and double-flange bottom rollers matching the bolt-hole dimensions, shaft lengths, and track margins of classic and modern Komatsu machines:

• Komatsu Mini & Compact Diggers: PC18, PC27, PC35, PC45, PC50MR, PC55MR, PC60-7, PC78US
• Komatsu Utility & Mid-Size Excavators: PC120-6, PC130-8, PC160LC, PC200-6/7/8, PC210-10, PC220-8, PC240LC, PC270, PC290
• Komatsu Production & Heavy Mining Machinery: PC300-7/8, PC350, PC360-10, PC400-6/7/8, PC450, PC600, PC800, PC1250
• Komatsu Crawler Bulldozers: D31A/P, D37EX, D50A, D65EX/WX, D85ESS, D155A, D275A, D375A

If you cannot find your machine model, simply send us your customized excavator parts number or excavator model, and our technical team will recommend the correct replacement roller.

Why Choose ShengAn Excavator Parts?

ShengAn Excavator Parts is a professional China excavator parts manufacturers, serving distributors, equipment owners, and maintenance companies worldwide.
We provide:

• OEM-quality aftermarket parts
• Factory-direct wholesale pricing
• Fast worldwide shipping
• Stable production capacity
• Professional technical support
• Strict quality management
• Custom packaging services
• Wholesale and distributor programs

Whether you need replacement parts for routine maintenance or large-volume procurement, we are committed to providing reliable products and responsive customer service.

Komatsu Track Rollers FAQ

Q: Why are Komatsu excavators equipped with a combination of single and double-flange rollers?

A: Single-flange rollers sit adjacent to the travel motor sprockets and front idlers where initial track entry occurs. Double-flange rollers straddle the central track links to physically lock the chain in position, stopping track walking or derailment when side-sloping or swinging heavy buckets.

Q: How can I verify the correct roller fitment for my Komatsu Dash-series machine?

A: You can cross-verify fitment by submitting your exact Komatsu model designation (e.g., PC200-8MO), the machine serial number plate, or the stamped OEM casting number. Our engineers will check center-to-center bolt hole spacing and shaft diameter before order execution.

Q: Do you support container-load wholesale orders and custom OEM packaging?

A: Yes. ShengAn partners with international equipment dealers, regional spare parts importers, and fleet workshops, offering direct factory pricing, low minimum order quantities (MOQs), and OEM private-label packaging options.