Product Description:

The SF-A3.0042.030-10.050 is a synchronous servo motor produced by Bosch Rexroth Indramat for the SF Servo Motors series. It is intended for integration into numerically controlled axes where rapid positioning accuracy is required. This type of motor is typically paired with a servo drive that regulates current, speed, and position in a closed loop. The motor follows the IM B5 construction type, so it mounts by a flange rather than a foot, and its flange pilot diameter of Ø110 j6 centers the housing against the machine plate. A 6-pin size 1 power-feedback connector simplifies single-cable routing between the motor and drive controller, which helps in compact machine layouts.

The motor has a nominal speed of 3000 rpm for contouring tasks. Its torque constant is 1.6 Nm/A, so each ampere of stator current produces that amount of shaft torque. During start-up or an unexpected stall, the motor can hold a 3.7 Nm locked-rotor torque, and it draws 2.3 A under that stalled condition. The drive’s intermediate circuit must supply a 670 V DC link so the inverter can generate the required phase voltages across the windings. Proper mechanical alignment is supported by a square bolt pattern of 116 mm, which helps distribute the mounting load around the pilot. This combination of electrical and mounting values helps the axis respond predictably during acceleration and steady operation.

The shaft may accept up to 133 N of axial force without exceeding bearing ratings. Structures subject to impact can rely on a 6 g shock resistance threshold during handling or operation. Power conductors inside the machine can be specified at 4 × 1.5 mm², matching the motor cable cross-section stated by the manufacturer. Two integrated NTC thermal sensors report winding temperature to the controller, allowing the drive to react if internal heat rises during repeated duty cycles. The specified pilot diameter tolerance also helps keep runout low after installation.