Product Overview

The Track Roller, also called Bottom Roller or Lower Roller, is a key undercarriage component installed beneath the track frame of crawler bulldozers.

For Komatsu D85 and Shantui SD22, the compatible track roller supports the machine weight, guides the track chain and transfers operating loads to the ground through the crawler system.

During bulldozer operation, track rollers are continuously exposed to:

• Heavy machine loading
• High impact from uneven terrain
• Rock and gravel abrasion
• Mud, dust and water
• Continuous travelling and pushing loads

A worn or damaged track roller may result in:

• Track chain misalignment
• Excessive vibration
• Abnormal travelling noise
• Uneven track wear
• Accelerated wear of sprocket and track links
• Increased maintenance costs and downtime

Our D85 / SD22 track rollers are manufactured using professional undercarriage production processes to provide a reliable aftermarket replacement solution for construction, earthmoving and heavy-duty bulldozer applications.

Key Features & Benefits

Common Application for D85 & SD22

Designed for compatible:

• Komatsu D85
• Shantui SD22

One replacement roller can serve both applications where the undercarriage specifications are confirmed to be interchangeable.

Heavy-Duty Alloy Steel Construction

Manufactured from:

40Mn2 Alloy Steel

Advantages:

• High load-bearing capacity
• Excellent impact resistance
• Strong fatigue resistance
• Good wear resistance
• Long service life

Advanced Heat Treatment

The roller tread surface is induction hardened to improve resistance against abrasive working conditions.

• Surface hardness: HRC 52-58
• Hardening depth: 8mm-12mm

Suitable for demanding applications involving:

• Rock
• Gravel
• Hard soil
• Continuous heavy-duty operation

Reliable Floating Seal System

Equipped with:

• Heavy-duty floating oil seals
• Wear-resistant bushings
• Internal lifetime lubrication

The sealing system helps prevent lubricant leakage and protects the internal bearing area from dust, mud and water contamination.

OEM-Style Direct Replacement

Manufactured with precision-controlled:

• Roller dimensions
• Shaft dimensions
• Mounting specifications
• Flange configuration

Designed for direct bolt-on installation without additional modification when the correct configuration is selected.

Technical Specifications