Product Description:

The SD-A4.070.030-05.000 is a brushless servo motor produced by Bosch Rexroth Indramat and distributed within the SD Magnet Motors series. As a brushless servo motor, it converts electrical drive commands into controlled mechanical torque for positioning axes and cyclic motion in automated equipment. In servo systems, this supports repeatable starts, stops, and speed changes during automated cycles. Bosch Rexroth Indramat assigns it to the Servodyn Ferrite motor class, indicating a ferrite-based magnetic circuit for dynamic control. The motor is supplied as a standard model for general industrial motion applications.

This motor can hold a load at standstill with 7.0 Nm of torque, which is the continuous torque available to maintain static positions without rotor movement. That capability helps the axis resist drift between commanded moves. During rated operation, the shaft rotates at a nominal speed of 3000 rpm. The internal tacho generator produces 2.7 V/1000 rpm, and drive electronics use this proportional voltage to close the velocity feedback loop without a separate encoder. Dynamic braking requires storage of 261 Ws of energy, and a braking resistor of 5.6 Ω is specified so excess kinetic energy can be dissipated as heat during rapid deceleration or emergency stops.

A Ferrite magnet set supplies the magnetic flux and offers temperature-stable performance for mid-power axes. Power leads are terminated on a 1.5 mm² connection, so the cable cross-section and terminal blocks must match that size. Speed feedback relies on a Brushless Tacho, which reduces wear compared with brushed sensors. For position referencing, the drive controller receives the rotor's incremental signals labeled A, B, C, 1, 2, 3, enabling commutation and homing functions without additional interface hardware. These signal channels let the controller track rotor position during motion and startup.