The Braking of high flywheel inertia is possible by the brakes with large heat capacity and high heat dissipation. The Electromagnetic Fail Safe Brakes are designed to interrupt the torque transmission in the event of power failure. The Braking torque is applied by spring force when power supply to the coil is interrupted.These brakes meet the requirements in machine tools,winches,conveyors etc, where for safety reasons, instant and reliable braking is required. The braking torque is produced by multiple coil springs acting on the plates and released by the magnet coil.