Hitachi EX400(9074011,9133956,AT201944) front idler forged/high quality idler fctory/idler ass'y/track idler undercarriage part

Product Specifications

Hitachi EX400(9074011,9133956,AT201944) front idler forged/high quality idler fctory/idler ass'y/track idler undercarriage part-Japan quality made in china

Key Advantages of Forged Construction

✔ 30% Higher Impact Resistance vs. cast idlers
✔ Superior Metal Density – Fewer voids/inclusions for structural integrity
✔ Extended Wear Life – Up to 2X longer service in abrasive environments
✔ Reduced Crack Risk – Ideal for high-shock load applications

Product Specifications

• Material: High-carbon alloy steel, heat-treated to HRC 50-55 hardness

• Bearing Type: Double-sealed, pre-lubricated roller bearings

• Flange Design: Reinforced double flange for track guidance

• Surface Treatment: Induction-hardened rolling surface (3-5mm depth)

  

  Performance Comparison: Forged vs Cast Idlers

  Feature	EX400 Forged Idler	Standard Cast Idler
  Service Life	8,000-10,000 hrs	3,000-5,000 hrs
  Failure Mode	Gradual wear	Sudden cracking
  Load Capacity	25% higher	Standard
  Best For	Mining, rock	General earthmoving

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  When to Upgrade to Forged Idlers?

  ▸ Operating in rocky/abrasive environments
  ▸ Experiencing frequent cast idler failures
  ▸ Running high-hour machines (>15,000 hrs)
  ▸ Needing to reduce unplanned downtime

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  Maintenance Guide

  • Every 250 hrs: Clean debris from flanges

  • Every 1,000 hrs: Check bearing play (<1.5mm)

  • Replace When:

    • Flange wear exceeds 35% thickness

    • Visible spalling on rolling surface

    • Bearing rotation becomes rough

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  Pro Tip: Pair with EX400 forged idlers and hardened track chains for complete undercarriage protection.

  Need a custom solution? Provide:

  1. Your exact machine model/year

  2. Current idler part number (if available)

  3. Primary material being handled (e.g., granite, iron ore)

  Available with optional laser-etched wear indicators for easy monitoring!