The 24V DC Permanent Magnet Power Off Brake is a dependable braking solution engineered for use with 86mm NEMA34 stepper motors. Built with an 86x86mm frame and a 14mm bore diameter featuring a 5mm keyway shaft, this brake delivers a rated torque of 4.5N·m at a rated current of just 0.5A. Its operating principle is both simple and effective: when power is cut, the permanent magnet's strong magnetic force firmly clamps the pure iron friction plate, securing the shaft in place. When power is restored, the coil generates a magnetic field that cancels out the permanent magnet's force, allowing the pressure spring to release the friction pad so the shaft can rotate freely. This fail-safe, power-off design makes it especially well suited for emergency braking situations during unexpected power loss. Compatible with a wide range of industrial applications, it performs reliably in automation equipment, chemical processing, food processing, machine tools, printing, and packaging machinery. Whether you need precise motion control or dependable holding power, this brake offers a secure and consistent mechanical interface for your NEMA34 stepper motor system.