Product Overview

The Track Roller, also known as Bottom Roller or Lower Roller, is a key undercarriage component installed beneath the track frame of Kobelco SK50SR crawler excavators.

The roller supports the machine operating weight, maintains track chain alignment and transfers load evenly through the undercarriage system during travelling and excavation.

For 5-ton class excavators, track rollers are exposed to:

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

A worn or damaged track roller may cause:

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

Our Kobelco SK50SR track rollers are manufactured using professional undercarriage production technology, providing reliable aftermarket replacement solutions for equipment dealers, repair workshops and machine owners.

Key Features & Benefits

Wide Compatibility

Designed for:

• Kobelco SK50SR
• Kobelco SK50SR-2
• Kobelco SK50SR-3

Different production years may use different OEM references. Please confirm by machine serial number before ordering.

Heavy-Duty Alloy Steel Construction

Manufactured from:

40Mn2 Alloy Steel

Advantages:

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

Advanced Heat Treatment

The roller tread surface is induction hardened.

Specification:

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

Improves resistance against:

• Soil abrasion
• Gravel impact
• Continuous operation wear

Reliable Floating Seal System

Equipped with:

• Heavy-duty floating oil seals
• Wear-resistant bushings
• Lifetime internal lubrication

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 when the correct configuration is selected.

Technical Specifications