Product Description:

The SF-A4.0172.030-00.050 servo motor is manufactured by Bosch Rexroth Indramat as part of the SF Servo Motors series. It supplies controlled rotary motion for automated stations that require accurate positioning and repeatable speeds, such as indexing tables, feeders, and small transfer modules. The unit combines the motor, a digital encoder, and an emergency plug brake in one compact assembly. This arrangement helps reduce the number of separate components needed around the axis while keeping motion control and stopping functions closely integrated.

The motor reaches a rated speed of 3000 rpm, giving the drive a stable operating point for mid-range duty cycles. A torque constant of 1.38 Nm/A links commanded current to output torque in a direct and predictable way. Closed-loop precision is supported by the optical encoder, which provides ±20 arcsec of positional accuracy and 8 million increments per revolution for very fine feedback resolution. Rotor inertia is 40 × 10⁻⁴ kg·m², which helps the motor respond quickly during acceleration and deceleration, and the housing can withstand impacts up to 6 g during handling and machine operation.

An allowable axial force of 154 N supports thrust loads that can occur in belt-driven or vertically loaded applications. The square mounting interface uses a flange that measures 142 mm across, which suits common ISO motor plate layouts. Start-up conditions draw a locked-rotor current of 13 A and can produce a locked-rotor torque of 18 Nm for short-duration load events. The integrated plug brake absorbs 785 Ws through a 1.0 ohm resistor to stop motion during emergency events. Electrical connection is handled through connector size 1 and a 4 x 1.5 mm² motor cable, which keeps installation straightforward without changing the motor’s stated mechanical and electrical performance.