This is a rear brake drum for heavy-duty trucks such as Sinotruk and Shaanxi Automobile, and is a core component of commercial vehicle braking systems.

1. Product Positioning & Application

Applicable Models: Primarily designed for heavy-duty trucks from Sinotruk (Howo, SITRAK, etc.) and Shaanxi Automobile (Delong, Aolong, etc.). It is also compatible with the rear axle braking requirements of other heavy-duty trucks.

Function: Mounted on the wheel hub of the rear axle, it works together with the brake shoes to slow down or stop the vehicle through friction braking. The inner surface of the brake drum is the friction working surface, while the outer part is bolted to the hub. It must withstand braking forces and high-temperature wear under heavy loads and high-speed driving conditions.

2. Appearance & Structural Features

Material: Mostly made of high-strength cast iron (or alloy materials in some cases), offering wear resistance, rigidity, and anti-fade performance, suitable for heavy loads and complex road conditions.

3. Service Life & Maintenance

Replacement Interval: Affected by load, road conditions, and braking habits. It is generally recommended to inspect wear every 100,000–200,000 km. Replacement is needed when the friction surface thickness falls below the limit, or when cracks or severe wear appear.

4. Compatibility

Fitment: Different truck models (e.g., Sinotruk Howo T7H, Shaanxi Automobile Delong X3000) have different rear brake drum dimensions, bolt hole patterns, and braking surface specifications. Selection must strictly follow the vehicle/axle model to avoid brake failure due to mismatched installation.

Summary

This rear brake drum is designed for heavy-duty trucks such as Sinotruk and Shaanxi Automobile. It is a critical wear part in commercial vehicle braking systems, requiring high strength, wear resistance, and anti-fade properties to ensure braking safety under heavy loads. The product shown in the image is in a warehouse, ready for shipment, with proper packaging, suitable for bulk supply to heavy-duty truck repair shops or OEM assembly lines.