Product Overview

The Track Roller — also known as Bottom Roller or Lower Roller — is a critical load-bearing component installed under the track frame of Caterpillar CAT E330 crawler excavators.

For a 30-ton class excavator, track rollers operate under extremely high working loads. They support the machine weight, guide the track chain and distribute ground pressure evenly during digging, loading and travelling operations.

During heavy-duty applications, the roller is exposed to:

• High impact loads
• Continuous vibration
• Rock and gravel abrasion
• Mud, dust and water contamination

A worn or damaged track roller may cause:

• Track chain misalignment
• Abnormal vibration
• Accelerated track link wear
• Increased sprocket and idler wear
• Higher operating costs

Our CAT E330 track rollers are manufactured according to OEM-style drawings, providing a reliable aftermarket replacement solution for construction, mining and earthmoving applications.

Key Features & Benefits

Wide Compatibility

Designed for:

• Caterpillar CAT E330
• CAT 330B
• CAT 330C
• Related CAT 330 series excavators

Reference OEM numbers:

• 117-5047
• 134-1013
• 150-3987
• 163-4149

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 / 50Mn alloy steel

Advantages:

• High load-bearing capacity
• Excellent impact resistance
• Improved fatigue strength
• Longer service life

Advanced Heat Treatment

The roller tread surface is induction hardened:

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

Improves resistance against:

• Rock impact
• Sand abrasion
• Heavy continuous loading

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 30-ton class excavator like CAT E330, undercarriage components represent a significant percentage of machine maintenance costs.

A high-quality track roller helps:

• Maintain correct track alignment
• Reduce crawler vibration
• Extend track chain service life
• Improve machine uptime
• 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 and roller position to confirm the correct replacement.