Product Description:

The SF-A4.0125.030-14.015 is a synchronous servo motor manufactured by Bosch Rexroth Indramat as part of the SF Servo Motors series. It delivers commanded torque quickly, allowing accurate positioning and speed regulation in industrial automation tasks such as gantry axes, tool handling, and assembly stations. The motor interfaces with Rexroth drive controllers to form a closed-loop system that translates electrical commands into controlled mechanical rotation. This arrangement supports repeatable motion on axes that must start, stop, and reverse direction with tight control.

Its nominal mechanical performance is highlighted by a rated speed of 3000 rpm, which suits rapid indexing duties. The electromagnetic coupling generates torque in proportion to current, expressed by a constant of 1.37 Nm/A; this linear ratio supports stable current-loop response in the drive. During startup, the motor can withstand a locked-rotor torque of 14.5 Nm while drawing up to 10.6 A, allowing breakaway of static loads without stall. Dynamic behavior is influenced by the 30 × 10-4 kg·m² rotor inertia, which balances acceleration response with load stability. Acoustic output is 58 dB(A), which helps keep operation quieter in general production areas. The rotor-mounted brake adds only 3.1 × 10-4 kg·m² of inertia, so the brake assembly has only a small effect on motion response.

During dwell periods, the holding brake engages automatically. It is energized from a control line rated at 24 VDC and draws 0.7 A, which keeps coil heating predictable during stationary holding. When engaged, the brake can clamp the shaft with 18 Nm of torque measured at 120 °C, preventing drift on vertical axes. Mechanical survivability is improved by a shock resistance of 6 g, so the unit can tolerate transport impacts or emergency stops without a shift in operation. After the brake is released, the shaft can return to commanded motion without interrupting normal servo operation.