This Electromagnetic Power Off Brake is a reliable mechanical braking solution designed specifically for NEMA34 86mm stepper motors. Built with a metal shell, this spring compression brake delivers for 86mm stepper motor holding torque of 4N.M, making it well suited for applications that require secure motor locking when power is cut. The brake operates on DC 12V or 24V, offering flexibility across a range of industrial and automation setups. It features an 8x7.5mm D shaped shaft hole for a secure and precise fit, and its compact 37mm thickness allows for easy integration into tight mechanical assemblies. The spring loaded design ensures the brake engages automatically upon power loss, providing a dependable safety mechanism for CNC machines, robotics, and other motion control systems. Whether you are building or upgrading a precision motion system, this electromagnetic power off brake offers a straightforward and effective solution for motor control and load holding.