The 86mm Permanent Magnet Power Off Brake is a reliable fail safe braking solution designed for NEMA34 stepper motors. Operating on 24V DC with a power consumption of just 5W, this brake delivers a rated torque of 6.5N·m and is built to fit a 14mm diameter shaft. Its working principle is straightforward: when power is cut, the permanent magnet's strong magnetic force securely clamps the pure iron friction plate, holding the shaft in place. When power is applied, the coil generates a magnetic field that cancels out the permanent magnet's force, allowing the friction pad to release and rotate freely with the shaft. This design makes it ideal for applications requiring automatic locking during power loss or emergency stops. Compatible with 86mm NEMA34 stepper motors, this brake is widely suited for use in automation equipment, chemical processing, food processing, machine tools, printing, packaging equipment.