Product Overview

The Track Roller, also known as Bottom Roller or Lower Roller, is an important undercarriage component installed beneath the track frame of Sumitomo SE75 crawler excavators.

The roller carries the machine operating weight, supports the track chain and maintains correct crawler alignment during travelling and excavation operations.

For 7-ton class excavators, track rollers operate under demanding working conditions:

• Continuous machine loading
• Uneven terrain impact
• Soil and gravel abrasion
• Mud and water contamination

A worn or damaged track roller may cause:

• Track chain misalignment
• Increased travelling vibration
• Abnormal track noise
• Uneven track wear
• Accelerated wear of sprocket and idler

Our Sumitomo SE75 track rollers are manufactured with professional undercarriage production technology, providing reliable aftermarket replacement solutions for equipment dealers, repair workshops and machine owners.

Key Features & Benefits

Heavy-Duty Alloy Steel Construction

Manufactured from:

40Mn2 Alloy Steel

Advantages:

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

Advanced Heat Treatment

The roller tread surface is induction hardened:

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

Improves resistance against:

• Soil abrasion
• Gravel impact
• Continuous operating wear

Reliable Floating Seal System

Equipped with:

• Heavy-duty floating oil seal
• High-quality bushing
• Lifetime lubrication system

Designed to prevent:

• Grease leakage
• Dust intrusion
• Water contamination

OEM-Style Direct Replacement

Manufactured with:

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

Provides direct bolt-on replacement without modification.

Technical Specifications