Product Description:

The 07.03.100-2287 is a spring-applied brake unit produced by KEB for the Combistop Spring Brakes series. It functions as a fail-safe stopping element: torque is generated by pre-loaded springs when power is absent, and the brake is released when a coil is energized. By holding or arresting rotary motion whenever an axis is de-energized, the module safeguards load positioning and assists controlled shutdowns in automated conveyors, packaging stations, or material-handling axes.

This model uses an electromagnetic release method, meaning coil excitation overcomes the spring force to disengage the brake without hydraulic or pneumatic circuits. Internally, the active component is a clutch magnet, and magnetic flux transmits the braking force to the rotor. The brake can sustain a static load of 15 Nm, which is sufficient for medium-inertia drives such as servo gearboxes. When energized, it draws only 20 W, reducing panel heat and easing power-supply sizing. Consistent clearance between the armature and rotor is maintained by a 0.2 mm nominal air gap, which limits response delay and prevents drag. There are no slip rings, so contact maintenance is avoided and electrical continuity remains stable over the device’s service life.

The braking torque acts on a single disc, a configuration that simplifies axial alignment and lowers axial spring deflection. Installation is straightforward because the housing is flange mounted, allowing direct attachment to IEC or NEMA motor end bells. Friction elements operate in a dry mode, eliminating the need for oil circulation and ensuring predictable static coefficients at every engagement. Coil excitation must be supplied as DC only; rectified control voltage avoids eddy losses and guarantees fast magnetic collapse during emergency stops.