Product Description:

The SR-A4.0230.060-04.000 synchronous servo motor is manufactured by Bosch Rexroth Indramat for the SR Synchronous Servo Motors series. It functions as a high-response rotary drive for machinery that demands rapid indexing, tight path accuracy, and repeatable torque delivery. Within an automation cell, the motor converts the regulated output of a servo amplifier into mechanical rotation, while its resolver encoder returns rotor position so the controller can maintain phase alignment during operation.

Rated for a top speed of 6000 rpm, the unit supports fast cycle times without sacrificing control resolution. A torque constant of 0.88 Nm/A links drive current to shaft torque, which helps the servo amplifier respond predictably in current-controlled loops. During a stall, the windings can accept a locked-rotor current of 25 A and generate a locked-rotor torque of 22 Nm, allowing the axis to resist static loads while feedback remains active. The rotor’s moment of inertia is only 0.0054 kg·m², so the motor can accelerate quickly and settle with minimal overshoot. An enclosure rating of IP67 protects internal components from dust and short-duration immersion, making the motor suitable for washdown areas. Axial loads up to 154 N can be applied to the shaft without exceeding bearing limits, which is useful when belt drives or helical gears introduce thrust forces.

The electromechanical brake is energized at 24 VDC, draws 0.7 A when released, and supplies a holding torque of 18 Nm to secure vertical or suspended axes during power loss. With the brake installed, the assembly weighs 23.7 kg and measures 388 mm overall, factors that affect moving-axis mass and available installation space. A 142 mm mounting flange centers the housing, and the 24 × 50 mm keyed shaft transfers motion to couplings or pulleys without slip. This arrangement suits machine sections that need fast servo response, reliable holding action, and resistance to moisture or contamination.