Product Description:

The ADF104B-B05TA1-BS06-D2N1 is a main spindle motor developed by Bosch Rexroth Indramat for the ADF Main Spindle Motors series. It drives the rotating spindles of machining centers, milling machines, and other automated tooling where steady torque and controlled acceleration are required. Paired with a matched inverter, the unit converts electrical energy into the mechanical rotation needed for cutting or grinding processes, and its internal coolant circuit sustains long duty cycles in production environments.

The rotor is balanced to R DIN ISO 2373, a quality grade that limits vibration at high speed. Position and speed are reported through digital servo feedback, allowing the drive controller to close the loop with high resolution. Mechanical installation is simplified by flange mounting, so the housing bolts directly to the machine frame. The motor is supplied without a holding brake, so static locking must be provided by the application or drive torque. Power conductors enter on Side A, and the connector is positioned on the top of the housing with a sealed plug interface. A standard rolling-element bearing set supports the rotor, the coolant and power connectors use the standard orientation for this series, and the size 104 stator laminations with the B-length stack make up the active magnetic volume.

As a liquid-cooled asynchronous motor, heat is removed by an internal coolant jacket rather than external airflow, allowing continuous operation at high load. The forged steel shaft is machined as a shaft with a keyway and balanced with the full key, which helps minimize runout when tooling is clamped. A shaft seal ring prevents lubricant loss and blocks coolant ingress into the bearing chamber. The electromagnetic design identified by winding code BS matches resistance and inductance to the corresponding ADF drive, and the housing terminates cleanly because there is no second shaft end on Side B.