Product Description:

The MAC021B-0-WS-2-E/032-A-0 is an AC servo motor produced by Bosch Rexroth Indramat for the MAC AC Servo Motors series. This model pairs with analog drive controllers that require precise velocity and torque regulation in automated machinery. By supplying continuous rotary motion and the feedback required by legacy or retrofitted control hardware, the unit supports positioning axes, feeders, and material-handling stations. Its compact form is suitable for automated equipment with limited mounting space and controlled motion requirements.

The motor is equipped with tachometer feedback, so the drive receives an analog speed signal proportional to shaft rotation and can maintain closed-loop regulation without a digital encoder. The motor has no blocking brake, so an external clamp or drive-generated torque must hold the shaft when the axis is stationary. Heat is removed through natural convection, eliminating the need for forced-air or liquid-cooling equipment. The housing must have adequate surrounding airflow so heat can dissipate during operation without an auxiliary fan.

Frame size 021 gives the motor a compact diameter that fits small gearboxes while accommodating enough stator material for industrial duty cycles. The B length designation indicates an extended magnetic stack that provides more continuous torque than the shorter A version while retaining a relatively low mass for responsive acceleration. Power enters through a connector on side A, simplifying cable routing when the output shaft faces the driven machine. The WS winding code identifies the coil resistance and inductance characteristics matched to compatible Indramat amplifiers. Phase wiring, feedback circuits, and insulation are coordinated for the voltage rise times associated with current-controlled analog drives.