Introduction to Truck Brake Shoes No Brass Mixture
Truck brake shoes no brass mixtures are advanced brake shoes friction materials engineered to eliminate copper content while maintaining high braking efficiency and environmental compliance. This brake shoes formula combines steel fibers, ceramic additives, and specialized binders to achieve superior thermal stability, reduced wear, and eco-friendly performance. Below is a detailed overview of its composition, technical specifications, advantages, and storage guidelines.
Technical Parameters
The table below outlines key properties of a no brass brake shoes mixture:
| Parameter | Specification | Remarks |
|---|---|---|
| Metallic Content | 55-65% (Steel fibers, Iron powder) | Copper-free design for eco-compliance |
| Density | 2.7-3.1 g/cm³ | Optimized for strength and heat transfer |
| Friction Coefficient (μ) | 0.38-0.45 (Dry) | Stable performance under heavy loads |
| Operating Temperature | -40°C to 650°C | Resists thermal degradation |
| Compressive Strength | ≥320 MPa | High-pressure resistance |
| Wear Rate | ≤0.4 cm³/MJ | Extended service life (80,000–200,000 km) |
| Shore Hardness | 65-80 Shore D | Ensures durability and drum compatibility |
Key Advantages
- Eco-Friendly Composition
Eliminates copper to meet global regulations (e.g., California’s SB 346) while maintaining performance . - Enhanced Thermal Stability
Steel fibers and ceramic additives ensure efficient heat dissipation, reducing brake fade even at 650°C . - Low Noise and Vibration
Ceramic particles in the brake shoes mixes dampen vibrations, minimizing squeal during braking . - High Durability
Reinforced steel fibers provide exceptional shear strength (≥3.8 MPa) and resistance to cracking . - Cost-Effective Maintenance
Reduced wear rates extend replacement intervals, lowering lifecycle costs for fleets .
Storage and Packaging
- Moisture Protection: Sealed, moisture-resistant packaging prevents oxidation of metallic components .
- Temperature Control: Store in environments between -10°C and 40°C to preserve material integrity .
- Stacking Limits: Maximum 5 layers to avoid deformation of the friction lining .
- Shelf Life: 24 months in unopened, original packaging .
Application of Brake Shoes Mixes
The brake shoes formula is molded under high pressure (20–35 MPa) and vulcanized to ensure adhesion to the shoe plate. Post-production testing includes thermal cycling and shear strength validation to meet ISO/TS16949 and E-Mark certifications . Customizable brake shoes mixes are available for OEM or aftermarket requirements, adapting to specific drum designs or operational conditions.
This copper-free innovation balances regulatory compliance, braking efficiency, and sustainability, making it ideal for modern heavy-duty trucks operating in environmentally sensitive regions.