Truck brake drums are typically constructed from high-strength materials designed to endure the significant stress and heat generated during braking. In general, the material of this brake drum is cast iron. The key components of a brake drum include:
- Drum
- The main purpose of the brake drum is usually made from cast iron. It supports for its durability and heat dissipation properties. The drum body features a cylindrical shape that houses the brake shoes and provides a surface for them to press against during braking. The internal surface of this drum plays an important role in braking system. This drum supports the tyre rim to seat on the top where the tyre has fitted.There is always a tolerance for machining the internal drum surface to regain the friction surface. This practice otherwise called as drum skimming.
- Vent Hole
- This vent hole helps to dissipate heat generated during braking. These features enhance the drum's performance by reducing the risk of brake fade, which can occur when the drum overheats.
- Friction Surface
- The inner surface of the drum is machined to create a smooth, even surface that allows for effective contact with the brake shoes. This friction surface is crucial for generating the necessary stopping power and is subject to wear over time.
- Mounting Flange
- This mounting flange is designed to accommodate wheel bolts and is crucial for maintaining the overall integrity of the braking system.
- Weight Distribution
- Brake drum ensures that weight is evenly distributed to the whole circumference, allowing for balanced braking performance across all wheels.
The primary function of brake drums is to provide a surface against which the brake shoes can press to generate stopping power. The uses of truck brake drums include:
- Braking System
- Heat Dissipation Rate
- Durability and Compatibility
- Performance and Safety
Regular maintenance and appropriate selection of brake drums will ensure reliable braking performance, enhancing the overall safety of the vehicles on the road.