Komatsu D51 Bulldozer Undercarriage Drive Sprocket Segment Parts
Komatsu sprocket segments are designed to provide stable power transmission and precise engagement with the track chain. Manufactured from high-strength alloy steel with advanced heat treatment, they deliver excellent wear resistance and reliable undercarriage performance in demanding working environments.
| Material | 35mnbh/40Mn2 |
|---|---|
| Surface Hardness | HRC53-58,deepth: 8-12mm |
| Colors | Black or yellow or customized |
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Kinton Parts is trusted by professionals worldwide for delivering high-quality parts for excavators, bulldozers, and other construction machinery—with guaranteed performance and durability.
Komatsu dozer sprocket segments are critical undercarriage components used to transfer driving power from the final drive to the track chain. Installed at the rear of the bulldozer undercarriage system, the sprocket segment engages directly with the track links, allowing the machine to move smoothly while maintaining stable traction under heavy load conditions. As durable replacement drive sprocket segments for Komatsu bulldozers, these components are engineered to reduce abnormal wear on track links and bushings while improving overall transmission efficiency. Proper tooth engagement helps minimize chain slippage, vibration, and power loss during operation, which is especially important in high-load environments such as mining, quarry work, and large-scale earthmoving projects.
Manufacturing Process
The sprocket segments are manufactured from high-strength alloy steel with excellent toughness and wear resistance. Advanced forging or precision casting processes are used to ensure structural integrity and stable mechanical performance.
Material Preparation, Forming & Structural Treatment
The production process begins with high-quality alloy steel material cutting and preparation. Depending on the product requirements, the sprocket segments are formed through precision forging or casting to achieve strong structural integrity and stable mechanical properties. After shaping, trimming and sand cleaning are performed to remove excess material and surface impurities. A normalizing heat treatment process is then applied to refine the internal grain structure, improve toughness, and reduce internal stress, creating a solid foundation for subsequent machining and hardening processes.
CNC Precision Machining
Advanced CNC machining equipment is used to ensure accurate dimensions and stable installation performance. Key machining processes include precision surface milling and bolt hole drilling, ensuring proper alignment with the sprocket hub and reliable engagement within the bulldozer undercarriage system. Accurate machining also helps reduce assembly errors and improve operational stability.
Surface Hardening & Tempering
To improve wear resistance and extend service life, the sprocket tooth surfaces undergo medium-frequency induction hardening. This process significantly increases surface hardness in high-contact areas exposed to continuous track chain engagement. A low-temperature tempering treatment is then applied to balance hardness and toughness, reducing the risk of cracking while maintaining long-term durability under heavy-load operating conditions.
Finishing, Inspection & Protective Coating
After heat treatment, the sprocket segments undergo shot blasting to remove surface scale and improve surface cleanliness. Strict dimensional and hardness inspections are carried out to ensure compliance with OEM standards and performance requirements. Finally, anti-rust coating and protective painting are applied before packaging, helping prevent corrosion during storage and transportation while improving overall product appearance.
OEM Compatibility
OEM part numbers and technical drawings can be provided upon request for compatibility confirmation.
| BRAND | MACHINERY MODEL NUMBER | |||||||
|---|---|---|---|---|---|---|---|---|
| KOMATSU | D20 | D21 | D31 | D37 | D39 | D41 | D50 | D53 |
| D55 | D57 | D60 | D61 | D65 | D68 | D75 | D80 | |
| D85 | D85A-12 | D87 | D90 | D95 | D135 | D155 | D155A-1 | |
| D155A-2 | D155A-3 | D155A-5 | D155AX-6 | D155AX-7 | D275 | D275A-2 | D275AX-5 | |
| D275AX-5EO | D355 | D355A-3 | D375A-2 | D375A-3 | D375A-5 | D375A-6 | D375A-8 | |
| D475A-2 | D475A-3 | D475A-5 | D475A-8 | D475A-8EO | D575A | D575A-2 | D575A-3 | |
| D65EX-12 | D65PX-12 | D61EX-15 | D61PX-15 | D61EX-24 | D61PX-24 | D37EX-21 | D37PX-21 | |
| D39EX-21 | D39PX-21 | D39EX-24 | D39PX-24 | D51EX-22 | D51PX-22 | D51EX-24 | D51PX-24 | |
| D85EX-15E0 | D85PX-15E0 | D85EX-18 | D85PX-18 | D155AX-8 | D155AXi-8 | D375A-8EO | D475A-8EO | |
Looking for a specific make or model not listed here? Reach out and we’ll be happy to assist.
Quality Control
Each sprocket segment undergoes strict inspection before shipment, including material testing, hardness verification, dimensional inspection, and tooth profile checking. These quality control procedures help ensure accurate fitment, stable engagement with the track chain, and dependable field performance.
Conclusion
Komatsu D51 sprocket segments are engineered for reliable power transmission, high wear resistance, and long-term durability in demanding bulldozer applications. With OEM-standard manufacturing, precision machining, and advanced heat treatment, they provide a dependable solution for undercarriage replacement and maintenance in construction, mining, and earthmoving industries.
SHIPPING & DELIVERY
At Kinton Parts, we ensure reliable, worldwide shipping of parts for excavators, bulldozers, and a full range of construction machines—safe, fast, and secure.
All products are securely packed using high-quality export cartons, reinforced wooden cases, or industry-standard palletized packaging to ensure maximum protection during transit and smooth handling during unloading.
Standard orders are typically shipped within 3–5 working days, while large or customized orders are usually dispatched within 7–20 days, depending on volume and production requirements.
We offer flexible global shipping options, including:
- International sea freight for cost-effective bulk transport
- Air freight for urgent orders
- Courier delivery (DHL, FedEx, UPS) for small-volume or sample shipments
Our logistics team manages every shipment carefully, providing real-time updates and tracking information until your order arrives safely at your destination.
Need assistance choosing the best shipping method for your location and timeline? Contact our team — we’ll help you plan a smooth delivery experience.
FAQ
Q: What are your main products?
A: We supply a full range of undercarriage and wear parts for excavators, bulldozers, and other heavy equipment. Our product line includes: Track rollers, carrier rollers, front idlers, sprockets, segments, track shoes, track chains, bolt and nuts, pins and bushings, bucket teeth and adaptors, filters, seal kits, swing bearing, and hydraulic cylinder—plus other essential replacement parts.
Q: Which countries do you export to?
A: Kinton Parts exports to over 60 countries worldwide, including:
USA, Canada, UK, Germany, Russia, UAE, Indonesia, Malaysia, Thailand, India, Pakistan, Bangladesh, Sri Lanka, South Africa, Colombia, Peru, and many others.
Q: Can I order a sample?
A: Yes, we accept trial orders. For parts in stock, samples can be shipped quickly. If you have technical drawings or existing samples, we also support customized production and mold development.
Q: How can I track my order after shipping?
A: Once your order is shipped, we will provide you with all necessary tracking information based on the shipping method. For express deliveries, you’ll receive a tracking number to follow the shipment online. For air or sea freight, we’ll send you the relevant documents such as the airway bill (AWB) or bill of lading (B/L), along with the packing list and commercial invoice to help with tracking and customs clearance.
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Trusted by professionals worldwide, Kinton Parts supplies premium-quality components for excavators, bulldozers, and more—with reliable quality you can count on.
