Stead Fast Engineers Pvt. Ltd. Manufactures Electro Magnetic Brakes For 440 Volts AC Supply. Stead Fast Engineers Pvt. Ltd is an ISO9001:2000 certified company that also offers induction furnaces, spares for crucibles, panels and cranes. Electro Magnetic Brakes For 440 Volts AC Supply operate at 1,2 and 3 phase power supply. When the power in given to the Electro Magnetic coil, the the coil gets energized and in turn pulls the plunger down. The plunger in turn operates the arm of the brakes and the brake opens. The Electro Magnetic Brakes For 440 Volts AC Supply is designed is such that as the lining keeps wearing out due to normal operation of the brake, the brake adjusts itself on its own to achieve the rated toque. It is available with a rated torque ranging from 200 Kg cm for the smallest brake [100mm Dia] up to 6900 kg cm for a 380mm dia at 50% coil rating i.E. The coil remains in circuit for a maximum of 5 min out of every 10min.