Spring-operated brakes and spring-applied brakes as fail-safe brakes, holding brakes, service brakes

Spring-operated brakes (spring-applied brakes) safely brake and hold components in place even if there is a failure in the power supply system.

The electromagnetically operated spring-applied brakes (also called spring-operated brakes) generate the braking effect via their built-in compression springs. In this type of brake, the braking torque or braking force is generated via pre-tensioned springs. The brakes are released electromagnetically. By applying a DC current, a magnetic field is generated which pulls the armature plate away from the friction surface against the spring pressure. The spring-applied brake has now been released (is now open) and no braking torque is generated.

The friction-generated braking torque is still available when no current is flowing. This also applies in the event of a mains failure or cable break, such that the brake closes/brakes in a deenergised state. Due to this method of functioning, spring-operated brakes are used as a safety-relevant component. The braking effect is lifted using the electromagnetic principle via the generation of a magnetic field.

The spring-applied brakes can either be designed as service brakes or holding brakes with an emergency stop function.

This special type of brake is used where masses need to be slowed down or held in place.

Their application area encompasses various industrial fields of application, such as:

• Automation
• Machine tools and machining systems
• Materials handling technology
• Packaging machines
• Hoisting applications, cranes
• etc.

As a fail-safe brake, it is also often used in spindle stroke applications and vertical axes.

Due to the compact design and the high wear resistance, the spring-applied brake guarantees a high level of durability.