Product Overview

The Track Roller — also known as Bottom Roller or Lower Roller — is a critical load-bearing component installed under the track frame of Doosan DH220 crawler excavators.

For a 20-ton class excavator, each track roller carries a significant portion of the machine's operating weight. It supports the track chain, guides crawler movement and distributes ground pressure evenly during digging, loading and travelling operations.

During daily operation, the roller is exposed to:

• Heavy impact loads
• Continuous vibration
• Rock and gravel abrasion
• Mud, dust and water contamination

A worn or damaged track roller may result in:

• Track chain deviation
• Increased track link wear
• Accelerated sprocket and idler wear
• Reduced machine working efficiency

Our DH220 track rollers are manufactured according to OEM-style drawings, providing reliable aftermarket replacement solutions for construction, mining and earthmoving applications.

Key Features & Benefits

Wide Compatibility

Designed for:

• Doosan DH220
• Doosan DH220LC
• Daewoo DH220 series

Suitable for crawler excavator undercarriage replacement applications.

Single & Double Flange Options

Available configurations:

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

to match different positions on the track frame.

Heavy-Duty Alloy Steel Construction

Manufactured from:

40Mn2 / 50Mn alloy steel

Advantages:

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

Advanced Heat Treatment

The roller tread surface is induction hardened:

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

The hardened tread provides improved resistance against:

• Rock impact
• Sand abrasion
• Continuous heavy loading

Reliable Floating Seal System

Equipped with:

• Heavy-duty floating oil seals
• High-quality bushings
• Lifetime lubrication system

Designed to prevent:

• Lubricant leakage
• Mud entry
• Internal bearing damage

OEM-Style Direct Replacement

Manufactured with:

• Accurate roller dimensions
• Correct shaft specifications
• Standard mounting design

Provides easy bolt-on installation without modification.

Technical Specifications

Why Trust Our Undercarriage Solutions?

For a 20-ton class excavator like Doosan DH220, undercarriage components represent a major part of machine maintenance costs.

A high-quality track roller helps:

• Maintain correct track alignment
• Reduce crawler vibration
• Extend track chain and sprocket service life
• Improve machine uptime

Every roller produced by our factory undergoes strict 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 replacement 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.