Product Description:

The SD-B4.140.030-05.010 brushless servo motor is built by Bosch Rexroth Indramat and belongs to the SD Magnet Motors series. Designed for industrial automation, the unit converts command currents from a compatible drive into precise shaft torque and speed. This supports accurate positioning and velocity control on packaging lines, material-handling axes, and general motion platforms.

It mounts on a 142 mm square flange that aligns with standard machinery faces and simplifies mechanical integration. During continuous operation, the shaft can reach a nominal speed of 3000 rpm, synchronized with the drive frequency for steady cycle times. Transient load surges can be handled because the winding can accept 45.5 A peak current without demagnetization. The housing meets the IP54 protection standard, so dust deposits and splashing fluids do not enter the stator cavity. Dynamic response is aided by a rotor inertia of 11.56 × 10⁻³ kg·m², and the 6.9 ms mechanical time constant supports rapid acceleration profiles. The electrical time constant is 9.24 ms, while standstill current is 13.0 A and the winding uses 8.48 mH inductance with 0.92 Ω resistance. These values describe the current-loop demand that the drive must support.

Long-term thermal behavior is indicated by a 130 min thermal time constant, allowing extended duty cycles before the winding reaches its limit. When the motor is locked, it can sustain 14.0 Nm of torque, and every ampere delivered produces 1.08 Nm/A, so torque at standstill scales predictably with current. Back-EMF rises at 150 V/1000 rpm, a value used by the controller for velocity estimation and overvoltage protection. A ferrite magnet set provides the excitation field without rare-earth materials, while the ø 24 × 50 mm shaft transmits power through keyed couplings.