Product Overview

The Track Roller — also known as Bottom Roller or Lower Roller — is a key load-bearing component installed under the track frame of Komatsu PC200 crawler excavators.

For a 20-ton class excavator, track rollers continuously carry the machine's operating weight and transfer ground pressure through the crawler system. They guide the track chain, reduce vibration and maintain smooth travel performance.

During excavation and construction operations, the roller is exposed to:

• Heavy machine loads
• Impact from uneven terrain
• Abrasive sand, rocks and soil
• Mud and water contamination

A worn or damaged track roller may cause:

• Track chain deviation
• Abnormal vibration
• Faster track link and sprocket wear
• Increased maintenance costs

Our Komatsu PC200 track rollers are manufactured according to OEM-style drawings, providing a reliable aftermarket replacement solution for construction, mining and earthmoving applications.

Key Features & Benefits

Wide Compatibility

Designed for Komatsu PC200 crawler excavators, including:

• PC200
• PC200LC
• PC200-5
• PC200-6
• PC200-7
• PC200-8

Single & Double Flange Options

Available configurations:

• Single Flange (SF)
• Double Flange (DF)

Suitable for different installation positions on the track frame.

Heavy-Duty Alloy Steel Construction

Manufactured from:

40Mn2 / 50Mn alloy steel

Features:

• High load-bearing capacity
• Excellent impact resistance
• Long fatigue life

Advanced Heat Treatment

The roller tread surface is induction hardened:

• Surface hardness: HRC 52-58
• Hardening depth: 5mm-10mm

This improves resistance against wear caused by rocks, gravel and abrasive soil.

Reliable Floating Seal System

Equipped with:

• Heavy-duty floating oil seals
• Premium bushings
• Lifetime lubrication system

Designed to prevent:

• Oil leakage
• Dust intrusion
• Water contamination

OEM-Style Direct Replacement

Manufactured with:

• Accurate dimensions
• Standard mounting specifications
• Correct shaft size

Designed for easy bolt-on replacement without modification.

Technical Specifications

Why Trust Our Undercarriage Solutions?

For a 20-ton class excavator like Komatsu PC200, undercarriage components represent one of the largest maintenance expenses during machine operation.

A reliable track roller helps:

• Maintain correct track alignment
• Reduce vibration during travelling
• Extend track chain and sprocket service life
• Reduce machine downtime

Every roller produced by our factory undergoes strict quality inspection:

• Raw material inspection
• Heat treatment verification
• Dimensional accuracy checking
• Seal performance testing

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.