Product Description:

The MKD025B-058-GP0-KN is a servo motor produced by Bosch Rexroth Indramat in the MKD Synchronous Motors series. As a permanent-magnet AC drive element, it converts electrical energy from the associated drive controller into precise rotary motion required for positioning tables, pick-and-place heads, and other automated axes on production lines. The motor fits compact machines where short settling times and high repeatability are preferred, and it integrates with Indramat digital controllers through resolver feedback for closed-loop speed and position regulation.

Its mechanical interface uses a flange that measures 54 mm, while the centering pilot is 40 mm, allowing accurate concentric alignment against gearbox or machine frames. The motor belongs to size 025 and length code B, giving a short overall body that fits limited mounting depths. The 058 winding set identifies the electrical resistance and inductance range expected by the connected drive. At standstill, the motor can deliver 0.9 Nm of continuous torque, supplying enough holding force for small feed axes without overheating. Integrated resolver feedback (RSF) produces analog sine-cosine signals that the drive interpolates for shaft position and commutation accuracy during rapid reversals.

The electrical and mechanical interfaces are placed on side B, where a compact connection box provides screw terminals for power and feedback conductors. This orientation simplifies wiring in cabinets that mount the motor in tight rows. The rotor uses a shaft with a keyway, enabling slip-free coupling to pulleys or pinions, and a shaft seal is included to limit lubricant migration into the stator. Because the unit is supplied without a holding brake, external clamps are required when static load retention is needed. Resolver signals provide relative position information, so an external reference switch is required for absolute homing at startup.