Product Description:

The KDA 2.1-050-3-AQ0-W1 spindle drive is manufactured by Bosch Rexroth Indramat as part of the KDA Spindle Drives series. It serves as the axis power module that links a supply unit with a high-speed spindle motor, providing regulated torque and speed for metal-cutting or drilling stations in automated machine tools. By translating the controller’s velocity commands into controlled armature currents, the unit supports precise spindle acceleration profiles and repeatable finishing passes. This operating role helps the spindle hold commanded speed as cutting load changes during drilling, milling, and similar machining cycles. Integrated fault diagnostics issue alarm codes for overcurrent, overtemperature, and supply irregularities, helping prevent hardware damage.

Internally, the drive is energized from a DC link of 300 VDC, and its power section is rated for a continuous output of 50 A. A mounted blower pushes air across the fin stack through a forced cooling arrangement, and the blower itself is supplied from an auxiliary line rated at 220 V 50–60 Hz. Speed reference data reach the control board as an analog voltage, enabling direct coupling with legacy CNC cards. This input method supports straightforward speed-command wiring in systems that still use voltage-based control signals. Because no additional interface option is installed, fieldbus or digital encoder expansion requires separate add-on hardware.

The drive is intended for continuous operation from 5 to 45 °C ambient temperature, and altitude is limited to 1000 m above sea level so the cooling path can work as intended. The blower and fins are packaged as a single mounted heat sink blower, which keeps airflow aligned with the power components and helps reduce panel depth. The unit is identified as Series 2. This series code indicates the product generation used for the drive, and it distinguishes the unit within the KDA line.