Product Description:

The SF-A3.0042.030-14.029 is a brushless synchronous servo motor manufactured by Bosch Rexroth Indramat within the SF Servo Motors series. In automated machinery, it delivers commanded torque and speed profiles to axes that require repeatable motion, such as pick-and-place units, feed systems, or indexing tables. The unit integrates an electromechanical holding brake for load retention during power-off states, and its pressure-tight enclosure supports use in wet or dusty production areas without additional protective covers.

At its nominal operating point, the motor reaches a rotational velocity of 3000 rpm, enabling direct coupling to gear stages or loads that need moderate speed with high positional accuracy. The motor has a torque constant of 1.6 Nm/A, which helps the drive translate current into predictable torque output during normal operation. An integrated spring-applied brake is energized from a 24 VDC source, draws 0.66 A while released, and provides 10.0 Nm of holding torque when power is removed. The brake hardware adds 0.6 kg to the assembly and contributes 1.06 × 10⁻⁴ kg·m² of additional inertia, so the axis response should account for the added rotating mass. A molded housing sealed to IP67 helps prevent water and dust ingress during washdown cycles.

When the shaft is loaded axially, the bearing set tolerates up to 133 N without shortening service life, allowing the motor to drive screw actuators or belt pulleys that impose thrust. After power loss, the brake reaches full torque after a mechanical delay of 20 ms, and the armature is fully released 29 ms after voltage is restored. During startup, a locked rotor can draw 2.3 A and produce 3.7 Nm, which is useful when setting short-term overload limits in the drive. The main rotor inertia is 7 × 10⁻⁴ kg·m², so acceleration and deceleration settings should reflect the stored kinetic energy of the rotating assembly.