KDA 2.1-050-3-L0D-W1 Bosch Rexroth Indramat
Wake Industrial LLC is not an authorized distributor of this product.
Wake Industrial LLC is not an authorized distributor of this product.
The Bosch Rexroth Indramat KDA 2.1-050-3-L0D-W1 is a spindle drive from the KDA Spindle Drives series. It features a rated current of 50 Amps, a 300 VDC supply voltage, and uses forced cooling with a mounted heatsink blower. The drive supports position command value through a digital interface and SERCOS speed command value, and operates in ambient temperatures from 5 to 45 degrees Celsius.
Internal Product Review
The KDA 2.1-050-3-L0D-W1 is a spindle drive from the Bosch Rexroth Indramat KDA series, featuring a rated current of 50 A and a DC supply voltage of 300 VDC. Efficient forced cooling is achieved with a mounted heatsink blower operating on 220V/50-60Hz, supporting consistent performance in demanding environments. The digital position command value interface and SERCOS speed command capability make this drive a strong choice for precision spindle control applications.
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Product Description:
The KDA 2.1-050-3-L0D-W1 belongs to the KDA Spindle Drives series manufactured by Bosch Rexroth Indramat. As a spindle drive, it regulates high-speed rotary axes in machine tools by converting a fixed DC bus into variable three-phase output for the motor while exchanging motion data with upper-level CNC controllers. Its design positions the unit as the drive module that closes the velocity loop and enforces axis limits inside an automated machining cell.
This model is powered from a DC bus of 300 V DC, and that fixed link voltage is the reference from which the inverter stage synthesizes the required spindle waveforms. A continuous output capability of 50 A allows the drive to sustain considerable torque demand without derating during roughing cuts or rapid acceleration. Speed references reach the unit through the SERCOS interface, and this fiber-optic fieldbus transmits setpoints and diagnostic data with deterministic timing. For coarse position synchronization, an auxiliary channel described as a digital position command value is available so a master controller can send stepwise position increments independent of the velocity loop. Internal thermal management relies on an external fan circuit that accepts 220 V at 50 to 60 Hz, so the heat sink blower can run from common facility power even when the DC bus is inactive. A second encoder socket is intentionally omitted, simplifying wiring when only one feedback source is required.
Effective heat removal is achieved through forced cooling that moves air across a mounted heat sink blower, and this arrangement keeps semiconductor temperatures stable during continuous high-load operation. The electronics operate in ambient temperatures from 5 to 45 °C, accommodating most factory climates without supplementary conditioning. Installation is permitted up to 1000 m above sea level, ensuring full current delivery before altitude-related air-density reduction can affect blower performance. The drive should be installed where airflow to the blower remains unobstructed.
