Disc Spring in Spring-Applied / Fail-Safe Brake Systems

Disc springs are used as a key elastic loading module in floating caliper disc brake systems with a spring-applied, fail-safe architecture.

In such systems, the disc spring provides the axial force required to actuate the brake caliper. This axial force is transmitted to compress the brake disc, thereby generating the necessary friction force for braking.

Functional operation of a fail-safe brake system

• When hydraulic or electrical pressure is applied, the brake is released.
• When system pressure is lost or power is removed, disc spring automatically applies the brake.

Therefore disc spring is responsible for generating the fail-safe engagement force, ensuring that the brake is automatically activated in the event of a power or pressure failure.

Disc springs are exposed to high-impact, rapidly changing dynamic loads during brake operation, Therefore, it is essential to verify that the material does not exhibit brittle fracture under such conditions.

For this reason, OPTIMUM disc springs apply notched impact testing for relevant materials. This test is used to evaluate material toughness and resistance to brittle failure, ensuring that no brittle fracture occurs that could compromise the safety function of the braking system.

OPTIMUM Disc Spring has been manufacturing disc spring for Fail-Safe Brake Systems since 1984. Need expert advice?

Contact our engineer today for customize solutions at jc@optimum-spring.com !