Product Description:

The ADF134D-B05TA0-BS27-A2N1 is a main spindle motor manufactured by Bosch Rexroth Indramat and supplied within the ADF Main Spindle Motors series. Designed as a liquid-cooled asynchronous drive, it serves as the primary rotary actuator in CNC machining centers, milling heads, and grinding spindles where high duty cycles are common. When paired with compatible drive electronics, it converts three-phase power into regulated spindle rotation that helps maintain stable cutting speed during automated machining. It is intended for machine tools that require repeatable spindle behavior during sustained production runs.

The frame is size 134 with a length code of D, giving the motor a large active stack for continuous torque production. A balance quality of R DIN ISO 2373 helps reduce vibration at high speed, while standard rolling bearings support the rotor for smooth operation. Installation uses flange mounting, and the housing places the power connector on the top side so cables route to side A through a plug-type interface. Winding code BS identifies the electrical characteristics matched to compatible Rexroth inverters. The motor uses a plain shaft without a shaft seal ring, and the opposite end has no second shaft extension. This layout simplifies coupling alignment and helps keep the spindle assembly compact.

The unit is a liquid-cooled asynchronous motor, so heat is removed by coolant delivered through an axial connection with a 1/4-inch thread. Coolant reaches the stator area directly, which helps limit thermal drift during long cutting passes. A digital servo feedback with integrated encoder supplies rotor position data to the drive for closed-loop speed and torque control. For controlled stopping, an electrically actuated holding brake with release is incorporated and engages automatically when power is removed. This combination supports accurate spindle control during extended machining cycles.