Product Description:

The SF-A3.0068.030-14.050 is a synchronous servo motor produced by Bosch Rexroth Indramat within the SF Servo Motors series. Designed for closed-loop positioning tasks in automated handling, packaging, and assembly lines, this motor converts controlled drive currents into repeatable rotational motion for mechanical axes. Its integrated holding brake and IM B5 flange mounting allow direct coupling to gearboxes or load shafts, simplifying installation while helping retain position when power is removed in vertical or intermittent-duty applications.

The electromechanical brake uses a rated current of 0.66 A at 24 V DC. When the brake is engaged, it produces 10.0 Nm of static torque to lock the shaft. Electrical leads for the brake are routed through a dedicated 2 × 1.5 mm² cable, while the power conductors use a 4 × 1.5 mm² cable that terminates in a size 1, 6-pin connector. During startup, the drive may demand a locked-rotor current of 5.0 A to overcome the initial locked-rotor torque of 6.8 Nm, which is useful information for drive sizing and overload protection. The motor housing also tolerates shocks up to 6 g, making it suitable for mounting on moving gantries without additional damping.

Once rotation begins, kinetic energy is managed by the plug braking path, which can absorb up to 261 Ws through an internal resistor with a resistance of 5.6 ohms. Continuous operation stabilizes at a rated speed of 3000 rpm, where the torque constant of 1.36 Nm/A relates controller current commands directly to shaft torque. The flange interface maintains concentric alignment in this speed range, and the housing geometry supports transport on machinery that sees high acceleration without additional reinforcement. This current-to-torque relationship helps the controller regulate motion consistently during acceleration and steady-speed operation.