Product Description:

The KDA 2.1-050-300-A00-W1-115 spindle drive is built by Bosch Rexroth Indramat and is part of the KDA Spindle Drives series. Intended for CNC machining centers and grinding machines, it converts regulated DC bus power into controlled three-phase output that keeps spindle motors on their commanded velocity profiles during cutting, finishing, and tool-change operations. That control is important where changing cutting loads can otherwise disturb spindle speed and affect surface finish. By working with supply and feedback modules, the unit supports closed-loop speed and torque regulation that improves dimensional accuracy on metal and composite workpieces.

The drive receives its DC link from a stable bus at 300 VDC, feeding the IGBT inverter stage without overvoltage stress. A continuous output of 50 A, listed as the Rated Current, sets the thermal limit for the semiconductor junctions, so the external supply and cabling should match that load. Internal fans provide forced cooling that moves cabinet air across the heat sink and helps maintain safe operating temperatures under full load. This cooling method depends on unobstructed cabinet airflow rather than passive heat dissipation alone. Reliable operation is intended for ambient conditions from 5 to 45 °C, where component tolerances, lubricant viscosity, and insulation performance remain within the expected range during long production cycles.

Installation altitude should not exceed 1000 m above sea level so that air density remains adequate for the cooling airflow. Thinner air at higher elevations reduces the cooling effect of moving air and can limit heat removal at the power stage. The hardware belongs to design release 2 and is identified under the Product Type entry as a spindle drive. The stored Ambient Temp Range marks the approved operating window for this unit.