Product Description:

The Bosch Rexroth Indramat KDA 2.1-050-3-A0I-U1 belongs to the KDA Spindle Drives series and is supplied as a dedicated spindle drive for numerically controlled machine tools. In automation layouts, it converts DC-link energy from a common supply into regulated three-phase output, allowing the connected spindle motor to accelerate quickly, hold constant speed, and reverse on command while the CNC maintains process accuracy. This operating role suits machining centers and similar equipment where stable spindle response affects surface finish, cycle timing, and repeatable process control.

The drive operates from a DC bus of 300 VDC and can deliver a continuous output of 50 A, providing the current needed for high-power cutting heads. Its integrated heatsink blower is fed from a single-phase source rated at 115 V, 50/60 Hz, so the fan can run independently of the main DC link. Thermal management is handled by a mounted heatsink blower that uses forced cooling to keep internal semiconductor temperatures within safe limits during sustained duty. The hardware is Series 2, and it omits a second encoder connector when only primary position feedback is required.

Environmental limits allow operation between 5 to 45 °C ambient and installation heights up to 1000 m above sea level without derating. Control systems can access spindle position through the additional incremental encoder output, which supports real-time synchronization with tool changers or probing routines. The commanded velocity arrives as an analog reference, enabling direct setpoint updates from standard CNC channels without added conversion hardware. The available feedback and command paths support cabinet integration where spindle motion must track machine sequencing and maintain consistent speed response during long production runs.