Product Description:

The SF-A3.0042.060-14.000 is a servo motor produced by Bosch Rexroth Indramat within the SF Servo Motors series. As a brushless rotary actuator, it converts commanded current into precise shaft motion for positioning axes and regulating feed drives in automated machinery. Integrated feedback and an electromechanical holding brake allow the motor to maintain position when power is removed, making it suitable for coordinated multi-axis systems in packaging, printing, and assembly lines.

The brake circuit is energized with 24 VDC, and a brake rated current of 0.66 A releases a mechanical stop with a brake inertia of 1.06 × 10⁻⁴ kg·m². During operation, the feedback system uses a single-turn encoder with 8 million increments per revolution, which supports very fine position control. The motor reaches a rated speed of 6000 rpm, and its torque constant of 0.70 Nm/A indicates the current required to produce commanded torque. At standstill, the holding brake provides 10.0 Nm of torque to keep loads in place when external locking is not used. For startup under heavy load, the stator can deliver a locked-rotor current of 6.0 A, and the combined rotor inertia is 7 × 10⁻⁴ kg·m².

Power is supplied from a 670 V DC link, allowing the motor to operate from compact drive systems without oversizing the supply bus. The housing measures 262 mm in length and the motor weighs 7.6 kg, which helps limit moving mass in gantry and robot arm applications. A 19 × 40 mm smooth shaft couples directly to precision couplings, and the absence of keyways helps reduce backlash in speed-controlled loops. During stalled conditions, the electromagnetic structure can withstand 3.9 Nm of locked-rotor torque without thermal damage, while the brake coil is designed to keep internal temperatures within acceptable limits during long duty cycles.