Product Description:

The SF-A3.0068.030-04.000 is a servo motor produced by Bosch Rexroth Indramat and belongs to the SF Servo Motors series. Inside an automation cell, it converts drive controller current into mechanical rotation for positioning tasks on packaging, handling, or assembly axes. The unit integrates a feedback encoder and an electromagnetic brake so the axis can be driven, held, and referenced without external hardware. It mounts to planetary gearboxes or direct couplings through a standardized flange and shaft interface, allowing repeatable torque delivery in closed-loop systems.

In operation, the motor reaches a rated speed of 3000 rpm, and torque is regulated in proportion to current using a torque constant of 1.36 Nm/A. During startup, the drive may draw a locked-rotor current of 5.0 A and produce a locked-rotor torque of 6.8 Nm until rotation begins. The integrated holding brake is energized with 24 VDC and requires 0.66 A to provide a static holding torque of 10.0 Nm when the axis is at rest. Separate inertia values of 11 × 10⁻⁴ kg·m² for the rotor and 1.06 × 10⁻⁴ kg·m² for the brake should be considered during acceleration and deceleration. A feather key sized A6 × 6 × 32 secures torque transfer along the 19 mm diameter shaft.

For positioning precision, the motor uses a digital single-turn encoder with a resolution of 8 million increments per revolution and an accuracy of ±20 angular seconds. Mechanical integration is supported by a square mounting flange that measures 116 mm, while the overall length is 294 mm and the Ø19 × 40 mm shaft fits standard couplings. The motor housing and embedded brake bring the total mass to 9.6 kg. Rotor and brake inertia should be taken into account when setting motion profiles for high-cycle positioning.