Product Overview

The Track Roller — also known as Bottom Roller or Lower Roller — is a key undercarriage component installed beneath the track frame of Hyundai R220 crawler excavators.

The bottom roller carries the machine weight, supports the track chain and ensures smooth crawler movement during digging, travelling and construction operations.

For a 20-ton class excavator, the track roller operates under continuous working loads and is exposed to:

• Heavy machine weight
• Impact from uneven terrain
• Rock and gravel abrasion
• Mud and water contamination

A worn or damaged track roller may result in:

• Track chain misalignment
• Increased travelling vibration
• Accelerated track link wear
• Premature sprocket and idler wear
• Increased maintenance costs

Our Hyundai R220 track rollers are manufactured according to OEM-style drawings and production standards, providing reliable aftermarket replacement solutions for construction and earthmoving applications.

Key Features & Benefits

Wide Compatibility

Designed for:

• Hyundai R220
• Hyundai R220LC-7
• Hyundai R220LC-9
• Hyundai R220-9S
• Hyundai R220LC-9S

Reference OEM numbers:

• 81N611010
• 81Q611011
• 81N811051G9

Single & Double Flange Options

Available configurations:

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

Suitable for different positions on the track frame.

Heavy-Duty Alloy Steel Construction

Manufactured from:

40Mn2 Alloy Steel

Advantages:

• High load-bearing capacity
• Excellent impact resistance
• Strong fatigue resistance
• Extended service life

Advanced Heat Treatment

The roller tread surface is induction hardened:

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

Provides excellent resistance against:

• Rock impact
• Sand abrasion
• Continuous working loads

Reliable Floating Seal System

Equipped with:

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

Designed to prevent:

• Oil leakage
• Mud intrusion
• Internal bearing damage

OEM-Style Direct Replacement

Manufactured with:

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

Provides direct bolt-on replacement without modification.

Technical Specifications

Why Trust Our Undercarriage Solutions?

For a 20-ton class excavator like Hyundai R220, undercarriage components are among the most frequently replaced wear parts.

A high-quality track roller helps:

• Maintain proper track alignment
• Reduce crawler vibration
• Extend track chain service life
• Protect sprocket and idler components
• 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 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.