Product Description:

The SF-A3.0042.030-00.018 is a servo motor manufactured by Bosch Rexroth Indramat within the SF Servo Motors series. Designed for closed-loop motion control, it supplies commanded torque to conveyors, handling modules, and other axes that require repeatable positioning in automated equipment and transfer systems. An integrated absolute encoder reports shaft position to the drive controller, enabling immediate feedback after power-up without a homing sequence.

The motor’s electromechanical baseline includes a rated speed of 3000 rpm, meaning the shaft can reach this velocity continuously when the drive delivers nominal current. To energize the stator, the connected inverter must present a DC link voltage of 670 V; this bus level supports the maximum back EMF the unit can withstand during regenerative events. Torque rises proportionally with phase current at a constant of 1.6 Nm/A, so 1 A produces 1.6 Nm in linear fashion until magnetic saturation begins. When the rotor is blocked, the motor can develop a stall torque of 3.7 Nm, a figure used to size mechanical couplings against startup loads. Power conductors are routed through a size-1 circular connector and must use cable rated at 4 × 1.5 mm²; this cross-section satisfies both voltage-drop and thermal limits over typical installation lengths.

Additional parameters describe how the unit behaves under atypical mechanical and braking conditions. The permissible axial load on the shaft is 133 N, allowing direct belt tension or thrust coupling without exceeding bearing life calculations, and dynamic stopping energy is absorbed by an internal plug brake resistor of 5.6 Ω, which can dissipate up to 261 Ws per braking event before thermal equilibrium is reached. During a locked-rotor condition, the stator draws 2.3 A; the associated I²t value helps set drive protection so the windings remain within their thermal class during braking and overload events that place higher thermal stress on the stator.