Product Description:

The SF-A4.0230.060-14.000 is a brushless servo motor manufactured by Bosch Rexroth Indramat within the SF Servo Motors series. It is intended for closed-loop axis drives where quick position cycles and repeatable velocity are required by packaging lines, pick-and-place gantries, and machining centers. By converting electrical power into controlled rotary motion, the unit forms the actuating element that the drive controller regulates in industrial automation systems.

At a rated speed of 6000 rpm, the motor supports continuous rotation suited to high-throughput tooling before field weakening is required. The electromagnetic design generates torque in proportion to current, quantified by a constant of 0.88 Nm/A, so the drive can calculate command values directly from load requirements. During a stalled condition, the shaft resists up to 22 Nm while drawing a locked-rotor current of 25 A; these values affect inverter sizing and short-term thermal limits. Position feedback is supplied by a single-turn STG encoder that produces 8,000,000 incr/rev, allowing the controller to resolve angular movement to fractions of a degree. The rotor inertia of 54 × 10⁻⁴ kg·m² moderates acceleration spikes, and the overall body length is 388 mm, giving space for windings while keeping the form factor compatible with compact mechanical frames. A 50 mm shaft extension simplifies coupling to standard clamping hubs.

The holding brake delivers 18 Nm of static torque and is energized by a control supply of 24 V while drawing 0.7 A, enabling safe axis parking when power is removed. This arrangement is useful on axes that must remain in position during shutdowns or temporary power loss. Its friction element contributes 3.1 × 10⁻⁴ kg·m² of additional inertia, a value that leaves step-response targets achievable. The motor weighs 23.7 kg, so mounting structures must support this mass together with operational loads. Power is transmitted through a ground steel shaft whose diameter is 24 mm, and this size supports standard couplings without the need for bushings or adapters.