D4H Bulldozer Undercarriage Parts Sprocket Segment Wheel for CAT Dozer
High-performance drive sprocket segments engineered for the Caterpillar D4H bulldozer undercarriage. Manufactured from premium alloy steel and precisely heat-treated, these sprocket segments ensure smooth track engagement, extended wear life, and superior power transmission in heavy-duty earthmoving environments.
| Material | 40Mn2/35MnBH |
|---|---|
| Surface Hardness | HRC52-58 |
| 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.
The Caterpillar D4H drive sprocket segment is a key undercarriage component responsible for transferring engine torque to the track chain, enabling stable and powerful machine movement. Designed to withstand harsh conditions such as compacted soil, abrasive rock, and heavy pushing operations, each dozer sprocket segment delivers consistent engagement and minimal vibration during long-term operation.
Unlike standard sprockets, the D4H segment design allows for easy replacement of individual segments without dismantling the entire drive assembly—making maintenance faster and more cost-efficient for contractors and fleet managers.
Material and Heat Treatment
To ensure exceptional performance, the D4H sprocket segments are forged from high-strength 35MnB or 40Mn steel, known for its excellent balance of toughness and wear resistance.
Each segment undergoes a deep induction hardening process, achieving a surface hardness of HRC 52–58, while maintaining a tough and ductile core to absorb impact loads.
Key material features include:
- High carbon and boron content for enhanced surface hardness and fatigue strength.
- Uniform hardness depth to ensure consistent wear even under uneven loading.
- Precision quenching and tempering for long service life in demanding working conditions.
Manufacturing Process
Each sprocket segment is produced using advanced CNC machining and automated forging lines to guarantee accuracy and uniformity.
The manufacturing process includes:
- Raw material cutting and inspection for chemical composition.
- Hot forging to refine the grain structure and improve toughness.
- Precision machining to maintain accurate pitch circle dimensions.
- Induction hardening to achieve superior surface strength.
- Tempering to reduce brittleness and prevent cracking.
- Surface treatment and coating for rust and corrosion protection.
- Final inspection to ensure every piece meets OEM dimensional and hardness standards.
This precise manufacturing workflow ensures every D4H sprocket segment fits perfectly with Caterpillar chains and idlers, providing smooth rotation and optimal load distribution.
Tooth Rough Machining
The sprocket blank is machined on a CNC lathe or gear hobbing machine to form the basic tooth profile.
Inner Ring Installation & Precision Machining
The inner ring is inserted and the entire part is precisely machined to ensure concentricity and dimensional accuracy.
Drilling
Mounting and lubrication holes are drilled to meet the installation and functional requirements.
Tooth Grinding & Finishing
After heat treatment, the sprocket teeth are ground or polished to remove burrs and ensure smooth engagement.
Surface Cleaning
The sprocket undergoes surface cleaning, removing scale and residue, preparing it for surface treatment.
Painting & Final Coating
The sprocket is coated with durable industrial paint (available in various colors), providing corrosion resistance and a clean, professional appearance.
OEM Compatibility
The sprocket segments are fully compatible with Caterpillar OEM undercarriage systems, meeting or exceeding the specifications for multiple bulldozer models, including Caterpillar D4H, D4C, and D4E. These components are designed for precise engagement with the track chain, ensuring efficient power transmission and reduced wear.
We also provide forged sprocket segments with the following OEM-compatible options:
- D4K Forged Sprocket Segment (6 Teeth, 6 Bolt Holes) – 278-2355
- D4K Forged Sprocket Segment (5 Teeth, 5 Bolt Holes) – 278-2356
Manufactured through a forging process, these sprocket segments offer enhanced structural strength, improved wear resistance, and longer service life under heavy-duty working conditions.
In addition to the D4 series, we also support custom-fit sprocket segments for a wide range of bulldozer models across Caterpillar, Komatsu, Shantui, and John Deere. Our solutions ensure broad compatibility, stable performance, and reliable operation in demanding applications such as construction, mining, and earthmoving.
| BRAND | MACHINERY MODEL NUMBER | |||||||
|---|---|---|---|---|---|---|---|---|
| CATERPILLAR | D3 | D3C | D3K | D3K2 | D4 | D4C | D4H | D4K2 |
| D5 | D5B | D5C | D5H | D5K | D5K2 | D5LGP | D5N | |
| D5R | D6 | D6B | D6C | D6D | D6G | D6H | D6K | |
| D6K2 | D6M | D6N | D6R | D6T | D6XE | D7 | D7E | |
| D7G | D7H | D7R | D7R II | D7T | D8 | D8H | D8K | |
| D8L | D8N | D8R | D8T | D9 | D9G | D9H | D9N | |
| D9R | D9T | D10 | D10N | D10R | D10T | D10T2 | D11 | |
| D11N | D11R | D11T | D11T CD | D11T2 | D3XL | D5XL | D6XL | |
| D6LGP | D7LGP | D8LGP | D9LGP | D5C LGP | D4G XL | D6G2 | D5G | |
| D3G | D3C III | D4E | D5E | D6E | D6S | D8S | D10S | |
Looking for a specific make or model not listed here? Reach out and we’ll be happy to assist.
Quality Assurance and Testing
Every sprocket segment undergoes strict quality control throughout production:
- Hardness and metallurgical testing to verify proper heat treatment.
- Dimensional checks for accurate pitch and bolt hole alignment.
- Dynamic fit tests to ensure perfect engagement with chain links.
Our in-house inspection system guarantees each batch meets ISO9001 and OEM manufacturing standards, ensuring consistent performance and longevity in real-world applications.
Performance Advantages
- Smooth track engagement reduces vibration and chain wear.
- High load-bearing capacity for efficient power transfer.
- Segmental structure allows cost-effective replacement.
- Resistant to impact, corrosion, and extreme pressure.
- Optimized tooth profile ensures stable traction on rocky or uneven surfaces.
These features make the D4H drive sprocket segment an ideal choice for long-term operation in quarrying, road construction, and heavy-duty land clearing.
Why Choose Our Products
To maximize service life:
- Regularly check sprocket teeth for rounding or deformation.
- Replace worn segments in pairs to maintain proper chain tension.
- Keep the chain and sprocket properly lubricated and tensioned.
- Avoid mixed use of new and worn segments to prevent uneven load distribution.
Routine inspections and timely replacement can greatly extend the overall life of your bulldozer’s undercarriage.
Conclusion
The Caterpillar D4H drive sprocket segment combines advanced metallurgy, precision machining, and heavy-duty heat treatment to deliver long-lasting performance in the most demanding job sites. Whether used in construction, mining, or forestry applications, it ensures your D4H bulldozer operates efficiently, safely, and cost-effectively.
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.
