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GLOBALMACHEX
Kobelco SK55 SK55SR SK55SRX Excavator Track Roller Bottom Roller Lower Roller Undercarriage Track Roller Assembly 72951433 Replacement

Kobelco SK55 SK55SR SK55SRX Excavator Track Roller Bottom Roller Lower Roller Undercarriage Track Roller Assembly 72951433 Replacement

Model: SK55TR

USD $50.00 - $120.00 / Pieces

Min. Order: 1 Pieces

Model:
Kobelco SK55
Description:
Track Roller
Replacement:
Kobelco SK55SR SK55SRX
Part No.:
72951433
Supported Trade Terms:
FOBEXW
Lead Time:
in stock
Supply Ability:
10,000 Pieces
Shipping Port:
Xiamen, China
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Product Features & Applications

Heavy-duty Track Roller (Bottom Roller / Lower Roller) for Kobelco SK55, SK55SR and SK55SRX mini excavators. Manufactured from high-strength alloy steel with precision machining, heat treatment and reliable floating seal technology. The roller supports the machine weight, guides the track chain and ensures smooth travelling performance for 5-6 ton class excavators used in construction, landscaping and utility projects. Compatible with Kobelco SK55 series excavators. Reference OEM numbers include 72951433, PW64D00010F0, PW64D00010F1, PW64D00010F2 and 772148.37300. Manufactured according to OEM-style dimensions for direct replacement with excellent wear resistance, reliable sealing performance and long service life. Please provide your machine serial number or existing OEM part number to confirm exact fitment.

Product Overview

The Track Roller — also known as Bottom Roller or Lower Roller — is an important undercarriage component installed beneath the track frame of Kobelco SK55 crawler excavators.

The bottom roller supports the excavator weight, maintains track chain alignment and ensures smooth crawler movement during travelling and excavation operations.

For compact excavators operating in:

  • Landscaping
  • Urban construction
  • Agricultural projects
  • Rental fleets

the track roller is exposed to:

  • Continuous 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
  • Accelerated track link wear
  • Higher maintenance costs

Our Kobelco SK55 track rollers are manufactured according to OEM-style drawings, providing reliable aftermarket replacement solutions for mini excavator users and equipment dealers.

Key Features & Benefits

Wide Compatibility

Designed for:

  • Kobelco SK55
  • Kobelco SK55SR
  • Kobelco SK55SRX
  • SK55SR-6

Reference OEM numbers:

  • 72951433
  • PW64D00010F0
  • PW64D00010F1
  • PW64D00010F2
  • 772148.37300

Mini Excavator Heavy-Duty Design

Although installed on compact excavators, the roller features:

  • High-strength steel body
  • Precision machining
  • Reinforced sealing structure

Suitable for:

  • Construction contractors
  • Landscaping companies
  • Equipment rental businesses

High Strength Alloy Steel Construction

Manufactured from:

40Mn2 / 50Mn Alloy Steel

Advantages:

  • Good wear resistance
  • Strong impact resistance
  • Stable performance under repeated loading

Heat Treatment Technology

The roller tread surface is hardened:

  • Surface hardness: HRC 50-58
  • Hardening depth: 4mm-8mm

Improves resistance against:

  • Soil abrasion
  • Gravel impact
  • Daily operating wear

Reliable Seal System

Equipped with:

  • Floating oil seal
  • High-quality bushing
  • Lifetime lubrication

Designed to prevent:

  • Grease leakage
  • Dust entry
  • Water contamination

OEM-Style Replacement

Manufactured with:

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

Provides direct bolt-on replacement without modification.

Technical Specifications

Item Specification / Detail
Machine Model Kobelco SK55 Excavator
Compatible Models SK55 / SK55SR / SK55SRX / SK55SR-6
Machine Class 5-6 Ton Mini Excavator
Part Type Track Roller (Bottom Roller / Lower Roller)
OEM Part Number 72951433 / PW64D00010F0 / PW64D00010F1 / PW64D00010F2
Flange Type Single Flange (SF)
Material High-strength 40Mn2 / 50Mn Alloy Steel
Manufacturing Method Forging / Casting / Machining
Surface Hardness HRC 50-58
Hardening Depth 4mm - 8mm
Sealing Floating oil seal, lifetime lubricated
Mounting OEM standard, bolt-on direct replacement
Application Mini excavator, construction and landscaping
Shipping Note Small component — suitable for air or sea freight

Why Trust Our Undercarriage Solutions?

For mini excavators like Kobelco SK55, reliable undercarriage parts are essential for maintaining machine stability and reducing operating costs.

A quality track roller helps:

  • Maintain track alignment
  • Reduce vibration
  • Extend track chain service life
  • Improve travelling performance
  • Reduce maintenance frequency

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.

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