Product Specifications

Drive Wheel / Sprocket Assembly | P/N 21N-271-1171

Direct OEM Replacement for Komatsu PC1000 Hydraulic Excavators | Manufactured by DPW Machinery Parts

• Komatsu Part Number: 21N-271-1171

• 100% OEM Interchangeable

• Forged Alloy Steel | Induction Hardened Teeth

Product Overview

The Komatsu 21N-271-1171 is the critical Final Drive Sprocket (Drive Wheel) that transmits power to the track system on your Komatsu PC1000-1 and PC1000SE-1 hydraulic excavators. Failure of this component doesn't just cause downtime; it can lead to secondary damage to the entire final drive and track chain.

This DPW Machinery Parts replacement is engineered as a direct, bolt-for-bolt substitute for the OEM part. Manufactured from premium forged steel and subjected to rigorous heat treatment, it delivers exceptional resistance to tooth wear and impact fractures, ensuring maximum uptime in the most demanding mining and heavy excavation environments.

Key Features & Engineering Advantages

• Precision Forging for Superior Strength

  • Feature: Fabricated from 41XX Series Chromium-Molybdenum Alloy Steel using a closed-die forging process.

  • Benefit: Forging aligns the grain structure to the part's shape, resulting in higher impact toughness and fatigue strength compared to cast alternatives, eliminating the risk of catastrophic tooth failure.

• Optimal Induction Hardening

  • Feature: Sprocket teeth undergo computer-controlled induction hardening to achieve a deep, consistent case hardness (approx. 55-60 HRC) while retaining a tough, ductile core.

  • Benefit: Maximizes resistance to abrasive wear from the track bushings, preventing premature "hooking" or sharpening of the teeth and extending service life.

• CNC-Machined to Exact Tolerances

  • Feature: All critical interfaces—including the spline bore, pilot diameter, and mounting bolt holes—are precision machined to Komatsu's original specifications.

  • Benefit: Guarantees a perfect fit with the final drive output shaft and secure mounting, ensuring optimal power transmission and preventing misalignment issues.

• Advanced Surface Protection

  • Feature: Treated with a phosphate coating for superior corrosion resistance and excellent paint adhesion.

  • Benefit: Protects the component during storage and transport, and provides a durable base for field painting to match your equipment specifications.

Technical Specifications & Compatibility

Application & Operating Environments

This DPW Drive Wheel (21N-271-1171) is built for severe-duty cycles, including:

• Surface Mining: Overburden removal, shot rock loading.

• Quarry Operations: High-abrasion environments with granite, limestone.

• Major Earthworks: Dam construction, large-scale infrastructure projects.

Why Choose DPW for Your Komatsu PC1000 Undercarriage?

1. Guaranteed Fit & Function: Every 21N-271-1171 assembly is verified against OEM specifications to ensure perfect compatibility.

2. Full Material Certification: We provide mill certificates and heat treat documentation for complete quality traceability.

3. Rigorous Non-Destructive Testing (NDT): 100% of critical components undergo magnetic particle inspection to detect any surface or sub-surface defects.

4. Complete Undercarriage Solutions: We offer a full suite of matched undercarriage parts for the PC1000, including track chains, rollers, and idlers for optimal wear life.

5. Global Logistics Support: We are experienced in handling international shipping and customs for oversized parts to get them to your site, anywhere in the world.

Frequently Asked Questions (FAQ)

Q1: Is this DPW part a direct replacement for my Komatsu 21N-271-1171?
A: Yes, absolutely. This DPW Drive Wheel Assembly is a direct, interchangeable replacement for the OEM Komatsu 21N-271-1171 part. It is manufactured to the same dimensional, material, and performance specifications.

Q2: Why is a forged sprocket better for my PC1000?
A: Forging produces a continuous grain flow that follows the shape of the sprocket, resulting in superior impact and fatigue strength. For a machine of the PC1000's size and power, this is critical for handling shock loads from tramming over broken rock, significantly reducing the risk of tooth breakage.

Q3: Do you recommend replacing the sprocket and track chain as a set?
A: Yes, for optimal performance and longevity, we strongly recommend replacing worn undercarriage components as a matched set. Installing a new sprocket against a worn chain (and vice versa) will cause accelerated, premature wear to both components. We can provide a quote for a complete undercarriage package.

Q4: What is the lead time and packaging for this part?
A: Lead times vary. Please contact our sales team for current stock status. The sprocket is securely packaged with rust-inhibitive VCI wrapping and crated on a wooden skid for safe transport.

Call to Action Section

Secure Your Komatsu PC1000's Productivity

Avoid costly unplanned downtime and protect your final drive investment. Contact DPW today for a competitive quote on the reliable 21N-271-1171 Drive Wheel Assembly.

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