Product Description:

The SF-A4.0125.060-14.050 is a servo motor manufactured by Bosch Rexroth Indramat as part of the SF Servo Motors series. Designed for industrial automation, the unit delivers programmable rotary motion and incorporates a mechanical holding brake so machines can remain fixed when supply power is removed. The model number identifies this unit's frame size, winding code, and the presence of the factory-mounted brake. It is suited for positioning tasks that require repeatable starts, stops, and stable holding at standstill. Its compact construction also helps the motor fit into machinery cells where installation space is limited.

Its dynamic operating point is a rated speed of 6000 rpm, which supports high cycle rates on indexing tables or feed drives. A torque constant of 0.71 Nm/A lets the connected amplifier relate motor current to output torque in a direct and predictable way. With a rotor inertia of 30 × 10⁻⁴ kg·m², the shaft responds quickly to command changes while still providing smooth rotational behavior during rapid motion. When started from rest, the drive may draw a locked-rotor current of 17 A to overcome static loads and create a locked-rotor torque of 12 Nm. The motor uses a 24 mm shaft diameter, a 50 mm shaft length, a 130 mm flange pilot diameter, and a total housing length of 324 mm with the brake installed. The additional brake inertia is 3.1 × 10⁻⁴ kg·m², which helps limit the effect of the brake on acceleration and deceleration behavior.

The holding system contributes a static torque of 18 Nm to secure vertical or suspended axes when motion must remain fixed. It is released by only 0.7 A from a 24 VDC control supply, which helps keep brake power demand low during operation. Overall mass, including the brake, is 17.7 kg, so the motor remains manageable for standard machine mounting arrangements. The integrated brake keeps the outer profile clean and avoids the need for a separate holding device at the axis. That layout can simplify surrounding mechanical clearances and leave more open space around nearby components for airflow.