Komatsu D155 Bulldozer Drive Sprocket Segment Parts Wholesale 175-27-22322
Heavy-duty drive sprocket segments designed for Komatsu D155 series bulldozers. Built from premium alloy steel and precision heat-treated, these segments deliver exceptional strength, smooth power transmission, and long-lasting wear resistance under the toughest earthmoving conditions.
| 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.
The Komatsu D155 sprocket segment plays a vital role in the bulldozer’s powertrain system, transferring torque from the final drive to the track chain and propelling the machine forward. In large crawler dozers like the D155A and D155AX series, the sprocket endures massive stress loads and continuous abrasion from soil, gravel, and rock.
Our replacement sprocket segments are engineered for maximum contact accuracy with the track links, ensuring efficient power delivery and minimizing wear on both the chain and final drive components. Each segment is carefully machined and surface-hardened to achieve long operational life even in high-impact conditions such as mining, reclamation, and heavy road construction.
Material and Heat Treatment
Komatsu D155 sprocket segments are made from high-quality boron-alloy steel (35MnB or 40Mn2) to balance wear resistance with impact absorption. This alloy composition offers high tensile strength and superior fatigue performance during heavy-duty operation.
Each segment undergoes deep induction hardening and controlled tempering, producing:
- Surface hardness: HRC 52–58 for excellent wear protection.
- Core toughness: maintained for shock resistance and crack prevention.
- Uniform hardened layer: ensuring consistent wear over the entire tooth profile.
Additionally, precision tempering eliminates brittleness while preserving durability, allowing the sprocket to perform reliably in extreme working temperatures and abrasive conditions.
Manufacturing Process
Every D155 sprocket segment is produced through a strict multi-step manufacturing process combining forging precision, mechanical strength, and dimensional accuracy.
Production stages include:
- Raw Material Selection: only certified alloy steel billets are used.
- Hot Forging: enhances the metal grain structure for improved toughness.
- CNC Machining: ensures exact tooth profile and perfect bolt-hole alignment.
- Induction Hardening: strengthens the working surface for longer wear life.
- Tempering Treatment: improves internal toughness and impact absorption.
- Surface Coating: provides anti-corrosion protection during storage and use.
- Final Inspection: includes hardness testing, geometry verification, and assembly fit tests.
Through these controlled procedures, each sprocket segment maintains precise engagement with Komatsu undercarriage chains, ensuring smooth motion and optimal traction on rough terrain.
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 Fit and Compatibility
These drive sprocket segments are fully compatible with the following Komatsu bulldozer models:
- D155A-1, D155A-2, D155A-3, D155AX-5, D155AX-6
- Reference model: 175-27-22322
We also provide sprocket segments for a wide range of Komatsu and Caterpillar bulldozers, ensuring that every customer can find a reliable and dimensionally accurate replacement.
| 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 and Testing
Each Komatsu D155 sprocket segment is subjected to multiple quality assurance checks throughout the production cycle:
- Metallurgical testing to confirm the steel composition and grain structure.
- Hardness mapping to verify consistent surface treatment depth.
- Dimensional inspection for pitch circle precision and bolt alignment.
- Assembly simulation tests to ensure perfect chain engagement.
All sprockets are manufactured under ISO9001:2015 certified quality systems, guaranteeing reliable and repeatable performance in every batch.
Performance Advantages
Our Komatsu D155 sprocket segments deliver performance that exceeds OEM standards, with proven advantages such as:
- Extended wear life under heavy abrasive conditions.
- Accurate tooth profile for consistent chain engagement and reduced vibration.
- Segmental design for easy maintenance and cost-effective replacement.
- Superior impact absorption, minimizing risk of tooth chipping or cracking.
- Excellent resistance to heat, corrosion, and pressure fluctuations.
These benefits make our sprocket segments the trusted choice for contractors who demand both durability and efficiency in their dozer fleets.
Conclusion
The Komatsu D155 drive sprocket segment represents a perfect balance of material strength, precision engineering, and long-lasting reliability. Engineered for demanding work environments, it ensures stable operation, reduced downtime, and optimized performance for your Komatsu bulldozer fleet.
When you choose our sprocket segments, you invest in components that perform with confidence — built tough, built to last.
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.
