Product Description:

The Bosch Rexroth Indramat KDA 3.2-050-3-DQ0-U1 is a spindle drive from the KDA Spindle Drives series and is design version 2 in the third product line. Its function is to regulate spindle speed and torque in CNC machining centers, lathes, and grinding machines by converting a shared DC bus into a precisely timed three-phase output. This allows the control system to keep the spindle synchronized with linear feed axes during contour milling, drilling, and high-speed finishing operations. The drive is intended for machine tools that require stable rotational control during changing loads and varying cut conditions.

It draws DC-link power from a bus stabilized at 300 VDC, and the internal power stage is rated for continuous output of 50 A, allowing it to drive medium-frame induction or synchronous spindles without derating. Thermal energy is removed by a mounted heat sink blower, and the drive relies on forced cooling to keep IGBT junction temperatures within acceptable limits during rapid acceleration cycles and sustained machining duty. The blower is supplied from an auxiliary feed of 115 V/50-60 Hz, so no separate low-voltage converter is required for fan operation. This arrangement supports consistent heat removal while the spindle drive is handling repeated speed changes.

The permitted ambient range is 5 to 45 °C, and reliable operation continues up to 1000 m above sea level. Speed references arrive through a 16-bit parallel digital channel, giving the CNC system fine control over surface speed during threading, contour cuts, and other precision machining tasks. Because the unit has no additional interface option, wiring is limited to the main command bus and standard feedback connectors, which helps keep the panel layout straightforward. The control path remains focused on core spindle-drive functions without adding extra interface hardware.