Product Description:

The SF-A3.0042.030-14.000 belongs to the SF Servo Motors series from Bosch Rexroth Indramat. It is a permanent-magnet servo motor intended for closed-loop positioning and velocity control in industrial automation lines. The unit connects directly to digital drives and includes a holding brake for vertical or indexing axes. Its design supports applications that need accurate motion response during repetitive machine cycles. The integrated motor, feedback, and brake arrangement also helps keep the axis package compact.

The motor reaches a rated speed of 3000 rpm, allowing fast traverses while remaining within the operating range associated with a torque constant of 1.6 Nm/A. When power is removed, the holding brake provides 10 Nm of static torque to secure the load; brake-side rotor inertia is 1.06 × 10⁻⁴ kg·m² and coil current is 0.66 A during engagement. Overall rotor inertia, including the encoder, is 7 × 10⁻⁴ kg·m², which supports responsive acceleration with stable control behavior. The assembly weighs 7.6 kg, and the housing length is 262 mm, which helps when installation space is limited. That combination suits machinery that needs controlled motion without excessive rotating mass or unnecessary mounting depth.

Feedback is generated by a single-turn absolute encoder with a resolution of 8 million counts per rev, providing fine position feedback for the servo drive. Absolute feedback allows the control system to know shaft position immediately after power-up within one mechanical revolution. The brake coil operates from 24 VDC, which can simplify wiring when the same control supply is used for nearby devices. During a stall, the motor can deliver a locked-rotor torque of 3.7 Nm while the corresponding current reaches 2.3 A, which is useful for drive current-limit settings. The motor uses IM B5 mounting, and torque is transmitted through a Ø19 × 40 mm shaft that accepts standard keyed hubs.