Product Overview

The Track Roller — also known as Bottom Roller or Lower Roller — is a key undercarriage component installed beneath the track frame of Hitachi RH108 crawler excavators.

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

During operation, the roller is exposed to:

• Continuous machine loading
• Impact from uneven terrain
• Soil and gravel abrasion
• Mud and water contamination

A worn or damaged track roller may cause:

• Track chain misalignment
• Excessive vibration
• Uneven track wear
• Increased maintenance cost
• Reduced machine working efficiency

Our RH108 track rollers are manufactured according to OEM-style production standards, providing reliable replacement solutions for equipment dealers, repair workshops and contractors.

Key Features & Benefits

Wide Compatibility

Designed for:

• Hitachi RH108 Excavator

Suitable for:

• Construction equipment maintenance
• Earthmoving applications
• Excavator repair workshops
• Heavy equipment distributors

Single & Double Flange Options

Available configurations:

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

Suitable for different track frame positions.

Heavy-Duty Alloy Steel Construction

Manufactured from:

40Mn2 Alloy Steel

Advantages:

• High load-bearing strength
• Excellent impact resistance
• Superior 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 operation wear

Reliable Floating Seal System

Equipped with:

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

Designed to prevent:

• Oil leakage
• Dust entry
• Water contamination

OEM-Style Direct Replacement

Manufactured with:

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

Provides direct replacement without additional modification.

Technical Specifications

Why Trust Our Undercarriage Solutions?

For crawler excavators like Hitachi RH108, undercarriage components directly affect machine stability, travelling performance and maintenance cost.

A reliable track roller helps:

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

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 or roller dimensions to confirm the correct replacement.