Product Description:

The ADF134B-B05TA0-BS27-A2N1 spindle unit is manufactured by Bosch Rexroth Indramat and belongs to the ADF Main Spindle Motors series. It is an asynchronous spindle with liquid cooling for CNC machining centers, where stable torque and controlled thermal behavior support long cutting cycles. The motor is intended for continuous rotary motion during milling, drilling, and similar machining operations. Integrated feedback lets the control monitor spindle position during indexed moves and tool-change sequences.

A frame size of 134 with length code B gives the motor a compact, high-torque profile. The housing uses flange mounting, and the power lead exits on Side A through a top-mounted connector or plug, which helps keep cable routing orderly in enclosed machine layouts. The output is a plain shaft at the drive end, while the opposite side has no second shaft end to reduce overhang loads on the bearing set. Motion data are supplied through digital servo feedback with an integrated encoder so the CNC can support spindle indexing and rigid tapping. Winding code BS matches the stator to compatible ADF inverters, and the motor uses standard-precision bearings for normal spindle support.

Cooling is handled by a liquid-cooled asynchronous motor design, with coolant routed through an axial 1/4" coolant port threaded into the stator jacket. This flow path helps keep winding temperature stable during long production runs under steady load. Rotor balance meets R DIN ISO 2373, which helps limit vibration that could affect surface finish during extended machining. The unit includes an electrically released holding brake to secure the spindle at rest. Because no shaft seal ring is installed, external sealing is needed if coolant can reach the spindle nose, and with the power cable routed to Side A, the assembly leaves clearance for way covers.