Product Description:

The SD-B3.050.030 is a brushless servo motor manufactured by Bosch Rexroth Indramat within the SD Magnet Motors series. The unit converts controlled electrical input into rotational motion for automated machinery such as indexing stations, pick-and-place modules, and light-duty conveyors. Integrated electronic commutation, together with an external servo drive, lets the motor maintain commanded position and velocity under varying load, making it suitable for precise industrial automation tasks that demand repeatable performance.

The motor develops 5.0 Nm of torque at standstill, giving low-speed holding capacity for indexing tables. Under rated excitation it reaches 3000 rpm, so gear stages can be omitted in medium-speed conveyors. A 116 mm square flange aligns with standardized mounting faces, while the shaft measures 19 mm in diameter and 40 mm in length for direct coupling. The internal thermistor actuates at 140 °C, and the drive should disengage above that limit to help prevent demagnetization of the ferrite stack. Feedback electronics are powered from ±15 V DC, and the brushless DC tacho carries a ±5% accuracy band to support stable velocity loops. The windings connect through a power connector with 1.5 mm² conductors, and both the rotor magnets and the overall motor construction use ferrite material.

Control wiring is routed through a feedback cable that combines 10 × 0.14 mm² signal pairs with 4 × 0.5 mm² power cores and can be run up to 100 m without degradation. During rapid deceleration, the drive shunts excess energy into a 3.3 Ω brake resistor; at least 293 Ws of energy must be absorbed, so the resistor bank must match this value. The analog tacho produces 2.7 V/1000 rpm, making speed scaling straightforward for most PLC counters. These values should be matched with the connected drive and braking circuit so the motor operates within its intended thermal and electrical limits.