Product Description:

The ADS112C-B05TB1-ASF3-B2S4 is a liquid-cooled servo motor produced by Bosch Rexroth Indramat as part of the ADS Servo Motors series. This spindle-grade unit drives cutting tools, grinding wheels, and other rotary loads in CNC and transfer-line automation. It converts three-phase electrical input into controlled mechanical rotation, and its integrated standard Indramat spindle encoder supplies position and speed feedback to the associated drive controller. An external coolant circuit and a dedicated sealing-air channel help the motor maintain thermal stability and protect internal bearings during continuous operation. The feedback system also supports closed-loop spindle control where speed consistency and accurate position tracking are required during repeated machining cycles.

At its nominal operating point, the motor delivers 20 kW of mechanical power while drawing a phase current of 58 A from a 380 V supply. This electrical input produces a steady shaft torque of 64 Nm at a synchronized speed of 3000 rpm. Thermal losses at that load reach 4.0 kW, so the cooling circuit must remain active and the coolant pressure must not exceed 3 bar. The enclosure carries a IP54 rating, blocking harmful dust and water spray when the motor is mounted inside machine housings. Power conductors require a minimum copper cross-section of 16 mm² to limit resistive drop during high-current cycles, and coolant must pass through a 100 µm filter to prevent abrasive particles from reaching the jacket. These operating conditions make steady coolant flow and clean circulation important for consistent spindle performance over long duty periods.

Dynamic limits are equally important for spindle integration. The rotor can accelerate to a peak of 18000 rpm provided sealing air remains at 1.5 bar and coolant flow is continuous. A mass moment of 0.02967 kg·m² enables rapid speed changes without imposing excessive load on the drive electronics. During sustained production, the vibration velocity must stay below 1.8 mm/s to protect encoder accuracy and extend bearing life. This operating profile suits high-speed milling and grinding heads where quick acceleration, stable rotation, and continuous thermal control are all necessary during normal machine use.