Product Description:

The SD-B3.050.030-04.000 from Bosch Rexroth Indramat belongs to the SD Magnet Motors series and is supplied as a permanent-magnet servo actuator for compact positioning tasks in automated machinery. By combining an electronically commutated stator with a magnetized rotor, the unit converts drive controller current into controlled angular displacement without brush wear. The actuator responds to commanded current changes with controlled rotation, which helps the drive manage positioning, indexing, and short travel moves. In multi-axis assemblies, it serves as the primary mechanical element for repeatable motion in feeders, pick-and-place heads, and indexing mechanisms where compact size and predictable response are important.

The front mounting flange measures 116 mm, which matches common gearbox or frame patterns used in compact machine layouts. Its stepped shaft measures ø 19 × 40 mm and accepts standard keyed couplings for direct mechanical connection. Rotor excitation is provided by Ferrite magnets, a material choice that resists demagnetization at typical industrial temperatures. The motor is supplied as basic equipment with a disk brake, which provides passive holding capability during power-off states. Under rated electronic commutation, it reaches 3000 rpm, making it suitable for medium-inertia loads such as conveyor rollers or small ball screws. The flange and shaft dimensions let the actuator fit compact drive trains without oversized adapters or couplings.

The actuator has a holding torque of 4.0 Nm, allowing it to resist static load at standstill. Commanded phase current can produce a stall torque of 5.0 Nm when the shaft must oppose external force at zero speed. As a Brushless servo motor, the design avoids sparking during operation. These torque values are useful when the axis must remain still during dwell periods or resist external force at zero speed. The motor can support controlled starts and stops in compact automation stations that need moderate torque density in a small footprint.