High Strength Grade 12.9 40Cr 102-8072+102-8073 Excavator Track Bolt And Nut

Short Description:

Ensure maximum uptime and safety for your heavy machinery with our premium High-Strength Grade 12.9 Excavator Track Bolt and Nut Kit. Specifically engineered for the extreme demands of construction, mining, and excavation, this bolt (102-8072) and nut (102-8073) pair delivers unparalleled shear strength, fatigue resistance, and durability. Manufactured from 40Cr alloy steel and heat-treated for superior performance, this is the reliable solution for keeping your equipment on the job.

Key Features & Benefits:​

Premium Grade 12.9 Strength: The highest commercial grade available, offering a tensile strength of 1220 MPa minimum and a proof load of 1100 MPa. This means exceptional resistance to stretching, breaking, and loosening under extreme shock loads and vibrations.

Durable 40Cr Alloy Steel Construction: Made from chromium alloy steel (40Cr), known for its excellent toughness, hardenability, and wear resistance, significantly outperforming standard carbon steel bolts.

Precision Heat Treatment: Undergoes a controlled quenching and tempering process to achieve the ideal balance of core strength and surface hardness, preventing brittleness and ensuring long-term reliability.

Corrosion Resistance: Features a durable coating (e.g., zinc plating, yellow dichromate) to protect against rust and corrosion, extending the component's life in harsh, wet, or abrasive environments.

Precision Machined Threads: Rolled threads for superior fatigue strength and a perfect, secure fit with the matching nut, reducing the risk of cross-threading and ensuring consistent clamping force.

Complete Kit for Your Convenience: Sold as a matched set (Bolt 102-8072 & Nut 102-8073), guaranteeing compatibility and simplifying your inventory and replacement process.

Built for Heavy-Duty Applications: Designed specifically to withstand the punishing conditions of excavator undercarriages, providing reliable performance in construction, mining, quarrying, and other demanding industrial applications.

Detailed Product Specification Table:

Compatibility:

This High-Strength Track Bolt and Nut kit (102-8072 + 102-8073) is designed as a direct replacement for OEM parts. It is compatible with a wide range of excavator models from leading brands like Caterpillar, Komatsu, Hitachi, Volvo, Doosan, and Kobelco. Please check your machine's manual or existing parts to confirm compatibility.

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Why Choose Our Excavator Track Bolts?

Enhanced Safety: Reduce the risk of catastrophic track failure on site, protecting your personnel and equipment.

Reduced Downtime: Our bolts' superior durability means fewer replacements and less frequent maintenance stops, boosting your project productivity.

Cost-Effective Solution: Avoid the high cost of genuine OEM parts without compromising on quality or performance. Get exceptional value and a longer service life.

Rigorous Quality Control: Every batch is tested to meet or exceed industry standards, ensuring you receive a consistently high-quality product.

FAQ

• Q: What does Grade 12.9 mean?

  A: Grade 12.9 is the highest metric strength grade for bolts. The "12" denotes a tensile strength of 1200 MPa, and the "9" indicates a yield strength ratio of 90%. This signifies a bolt with very high clamp force and resistance to fatigue.

• Q: Are these bolts resistant to vibration loosening?

  A: Yes. The precision fit between the high-strength bolt and nut, combined with the correct installation torque, provides excellent resistance to vibration-induced loosening, a common issue in construction machinery.

• Q: How do I ensure I'm installing these correctly?

  A: Always refer to your equipment's service manual for the specified torque value. Use a calibrated torque wrench and ensure threads are clean and free of debris. Proper installation is critical for achieving the designed performance.

• Q: Do you offer a warranty?

  A: Yes, we stand behind the quality of our parts. Please see our warranty policy for detailed information.

Detailed photos

Xiamen Doozer Industries Co., Ltd. is a leading supplier of high-quality undercarriage parts for excavators and bulldozers in China. .With over 16 years of experience, our brand DZR is widely recognized for its superior quality and excellent service.

We boast extensive expertise in OEM and After Markets for various construction machinery, including PC1250, EX1000, D9N,D11N, D475, EC950,and other models. Our specialty lies in offering a diverse range of crawler-type undercarriage and correlated replacement parts such as track rollers, carrier rollers, idler assemblies, recoil spring assemblies, track link assemblies, track shoes, sprockets, segments, excavator buckets, bucket teeth & adaptors, cutting edges, end bits, excavator boom arms/sticks, bucket pins & bushes, bolts, and nuts for excavators and bulldozers.
Our products are compatible with most major makes such as Caterpillar, Komatsu, Hitachi, Kobelco, JCB, Volvo, Kato, Daewoo, Doosan, Hyundai, Samsung, and more. We export a majority of our products to Europe, Southeast Asia, Middle East, South America, and other regions.

Our motto "Quality First" reflects our commitment to continuously improving our production techniques, ensuring that we provide better products at competitive prices. We welcome customers from all over the world to consult with us and visit our company to create mutual benefit and a successful business relationship together.

We believe that our experience, quality products, and excellent customer service will make us your best partner for construction machinery parts.