Product Description:

The KDA 2.1-100-3-D00-W1 belongs to the KDA Spindle Drives series manufactured by Bosch Rexroth Indramat. As a spindle drive, it links the machine controller to a three-phase motor, shaping power and feedback so that milling, drilling, or grinding spindles follow programmed speed profiles. By regulating current while supplying diagnostic data, the unit supports automated tool changes and closed-loop surface finishing that depend on constant rotational accuracy across variable loads.

Inside the power section, the drive draws a bus voltage of 300 VDC, and this fixed level sets the maximum electromagnetic torque the connected spindle can reach. A continuous output limit of 100 A indicates the current the power stage can supply during sustained operation. The integral heat sink blower is supplied from an auxiliary line at 220 V, 50–60 Hz, so ventilation remains active during coast-down. Safe operation is intended within an ambient temperature range of 5 to 45 °C, which helps prevent condensation at startup and derating at higher temperatures. Installation altitude is restricted to 1000 m above sea level so that internal components operate with predictable air density and heat dissipation.

In service, thermal management relies on a mounted heat sink blower that forces air over power semiconductors. This arrangement uses forced cooling and allows full current delivery without external ducting. Speed references arrive from a controller as a digital 16-bit parallel value, which avoids analog drift and supports multi-axis synchronization. The unit has the lack of an additional interface option, which reduces configuration variables in the control setup. The absence of a second encoder input keeps feedback processing in the master CNC, so drive resources remain focused on current regulation and protective functions rather than multiplexed sensing.