KM908 Triple Grouser Track Shoe 135mm Pitch 23MnB Boron Alloy Steel for Mini Excavator Undercarriage Plate

Product Overview

The KM908 Triple Grouser Track Shoe is a precision-engineered undercarriage component for 2-4 ton class mini excavators. With a compact 135mm pitch and narrow 450mm width, this shoe is specifically designed for the lightweight track chains of mini excavators used in urban and residential construction. Hot forged from 23MnB boron alloy steel, each shoe undergoes controlled heat treatment to achieve balanced hardness (HRC 38-44) — hard enough for wear resistance yet tough enough to absorb the shock loads typical of mini excavator digging cycles. The triple grouser profile provides smooth ride quality and surface protection, making it the preferred choice for operators working on finished surfaces.

Key Features

• Ultra-Compact Mini Excavator Fit: Designed for 2-4 ton class mini excavators with 135mm pitch and narrow 450mm profile
• Triple Grouser Urban Design: Low-profile grousers ideal for urban construction, landscaping, and surface-sensitive applications
• Precision Forged Small Part: 23MnB steel with tight tolerance die forging for consistent quality across high-volume production
• Cross-Brand Compatibility: Fits Komatsu PC20 PC30, CAT 302 303, Hitachi EX30, and similar mini excavator models

Technical Specifications

Factory Strength

Our manufacturing facility spans over 20,000 square meters equipped with advanced forging production lines, CNC machining centers, and automated heat treatment furnaces. We operate 8 die forging hammers (1T-10T capacity), 12 CNC turning/milling machines, and 4 continuous mesh-belt quenching & tempering furnaces with precise temperature control. Annual production capacity exceeds 500,000 track shoes. Every batch undergoes rigorous quality inspection including dimensional gauging, hardness testing (HRC), ultrasonic flaw detection, and magnetic particle inspection. We hold ISO 9001:2015 and ISO 14001:2015 certifications, with SGS/Bureau Veritas third-party inspection available upon request. Our in-house metallurgical lab ensures consistent 23MnB/25MnB boron steel composition and optimal heat treatment parameters for maximum wear resistance and impact toughness.

Quality Control Process

1. Incoming raw material inspection with spectrometer analysis
2. Forging temperature monitoring and die wear inspection
3. Post-forging dimensional check on sampling basis (1 per 50 pcs)
4. Heat treatment hardness verification (HRC 40-48 on grouser surface)
5. Magnetic particle inspection for surface crack detection
6. Final dimensional inspection with go/no-go gauges
7. Anti-corrosion coating and packing inspection

Applications

Compatible with Komatsu PC20, PC30, CAT 302, 303, Hitachi EX30, and similar 2-4 ton mini excavators. Ideal for landscaping, utility trenching, indoor demolition, and urban construction.

Frequently Asked Questions

Q1: How many shoes does a mini excavator need?

A typical 2-4 ton mini excavator requires 36-42 track shoes per side (72-84 total). Please confirm your track chain link count for an accurate quantity.

Q2: Is this compatible with rubber track machines?

This steel track shoe is designed for steel track chain systems. If your machine currently uses rubber tracks, you would need to convert to a steel track chain system first.

Q3: What is the weight capacity of these shoes?

These shoes are designed for machines up to 4 tons operating weight. The forged 23MnB construction provides ample strength for mini excavator applications with a generous safety margin.