Product Description:

Bosch Rexroth Indramat builds the ADF134B-B05TA0-BS27-A2N2 for the ADF Main Spindle Motors series. As a liquid-cooled asynchronous main spindle motor, it supplies continuous rotary power to machining centers and other automated equipment that need precise speed control at the work spindle. The motor’s closed-loop architecture, efficient internal coolant circuit, and compatibility with Indramat drive packages make it suitable for high-duty cutting, grinding, and forming operations in industrial automation. This arrangement supports stable spindle output during continuous-duty machining cycles where speed accuracy and temperature control both affect process quality.

Rotor smoothness is governed by its S DIN ISO 2373 balance class, which limits residual vibration so that tool chatter is minimized at elevated spindle speeds. A frame designation of 134 means the stator diameter supports higher torque density without increasing the installation footprint. Position and speed are measured by digital servo feedback delivered through an integrated encoder, and this signal lets the drive controller correct slip immediately and maintain the commanded rpm. When power is removed, an electrically released holding brake clamps the shaft to prevent drift during tool changes or maintenance. Thermal energy exits through an axial 1/4-inch coolant connection, a threaded port that channels liquid directly around the stator jacket for stable winding temperatures.

Mechanical integration is simplified by flange mounting, so the housing bolts to the machine frame while the power conductors reach the motor from the top on side A via a connector plug. The shaft is a plain shaft without a seal ring, and there is no secondary shaft end on side B; this arrangement suits belt-driven or coupling-driven spindles where additional interfaces are unnecessary and where external transmission components set the final spindle layout. Internal windings use code BS, matching electrical resistance and inductance to Indramat inverters. The motor also uses standard bearings and a B-length housing.