Product Description:

The SF-A5.0460.030-14.019 is a servo motor built by Bosch Rexroth Indramat as a member of the SF Servo Motors series. This permanently excited rotary actuator is intended for closed-loop motion axes in industrial automation, where precise speed and position control are necessary for packaging machinery, handling modules, and similar equipment. By combining a high-resolution encoder with an integral holding brake, the motor provides dynamic running characteristics and secure standstill capability on vertical or safety-critical axes, reducing the need for external locking devices.

For static holding, the built-in brake develops 56 Nm of torque, which is enough to secure the shaft against back-driving under rated load. The brake’s kinetic characteristics are influenced by its 0.0030 kg·m² inertia and 3.8 kg mass, while release is achieved with a steady winding draw of 1.33 A from a 24 VDC supply. Shaft position feedback is delivered by an optical encoder whose resolution is 8,000,000 increments per revolution and whose precision is ±20 angular seconds, enabling fine interpolation for smooth velocity loops. Under continuous operation, the rotor can reach 3000 rpm, and the stator carries two NTC temperature sensors that report winding heat for thermal derating.

Electrical power is fed from a drive controller that provides a DC link of 670 VDC, supporting rapid current buildup during acceleration. If the shaft is blocked, the motor can accept 29 A of locked-rotor current while producing 46 Nm of stall torque. Dynamic response is helped by the modest rotor inertia of 0.0166 kg·m², allowing quick reversal without causing control loop overshoot. The electromagnetic design delivers a torque constant of 1.58 Nm/A, so the drive can calculate output torque directly from measured phase current.