Product Description:

The SD-B5.250.015-05.000 is a rotary actuator built by Bosch Rexroth Indramat and supplied within the SD Magnet Motors series. It is a permanent-magnet servo unit intended for closed-loop positioning tasks in industrial automation lines where repeatable torque delivery and speed control are required. It is well suited for indexing tables, feed axes, and similar mechanisms that need repeatable starts, stops, and dwell periods under servo control. In automated transfer equipment, this type of actuator is used where axes must follow frequent motion changes without losing positional stability. The compact form also suits machine layouts with limited mounting space.

A mounting flange measuring 116 mm fixes the motor to the machine frame and aligns the stator to the driven load. Inside, the rotor carries ferrite magnets that establish the working flux without rare-earth materials. Rated operation occurs at a nominal speed of 1500 rpm, which helps the motor match common gearbox ratios while keeping electrical frequency moderate. When the shaft is energized but stationary, it can sustain a holding torque of 25 Nm, providing static torque for clamping or vertical-axis support. Mechanical power leaves the unit through a shaft sized at ø 19×40 mm, allowing direct coupling to standard keyed hubs or flexible couplers.

The motor is classified as a brushless servo motor, eliminating commutator wear and limiting routine service mainly to bearing-related maintenance. The absence of brushes also avoids contact-related electrical wear during repeated reversing cycles and supports cleaner operation in enclosed machine sections. This layout removes the voltage drop associated with sliding electrical contacts and helps the drive maintain consistent response at low speed. Its electrical characteristics are aligned for use with compatible Indramat power stages, supporting stable servo operation in positioning and speed-controlled applications. That behavior is useful on axes that alternate between short indexing moves and longer continuous traverses.