KDA 3.1-050-3-AP0-U1 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 3.1-050-3-AP0-U1 is part of the KDA Spindle Drives series and is designed as a spindle drive with a rated current of 50 Amps and a DC supply voltage of 300 VDC. It features forced cooling using a mounted heatsink blower powered by a 115V AC source, and supports operation in ambient temperatures from 5 to 45 degrees Celsius up to 1000 meters above sea level.
Internal Product Review
The KDA 3.1-050-3-AP0-U1 spindle drive from Bosch Rexroth Indramat utilizes a mounted heatsink blower with forced cooling and operates on a 300 VDC supply voltage. Rated at 50 A, it supports a second encoder input for spindle or additional motor feedback, enhancing control flexibility. This model is well suited for demanding spindle drive applications where consistent cooling and precise speed control are required.
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Product Description:
The KDA 3.1-050-3-AP0-U1 is a spindle drive manufactured by Bosch Rexroth Indramat within the KDA Spindle Drives series. It forms the power stage between the common bus supply and the three-phase windings of a machine-tool spindle motor, modulating current in real time so cutting speed follows the command profile from the CNC. Its embedded diagnostic logic and dedicated feedback connector help the controller maintain tight velocity and position loops during turning, milling, or grinding cycles where stable spindle speed affects surface finish and process consistency. This operating role makes the unit suitable for spindle applications that must react quickly to load changes during metal-cutting processes.
The power section operates from a DC link rated at 300 VDC and can deliver a continuous line current of 50 A to the motor windings. Thermal energy is removed by a heat sink-mounted blower, and the fan is supplied from an external 115 V/50-60 Hz single-phase source rather than depending only on cabinet airflow. Safe operation is specified for an ambient range of 5 to 45 °C, allowing installation in temperature-controlled shop floors without additional conditioning equipment. By removing heat directly at the sink, the blower helps the power section maintain stable performance during sustained spindle operation.
Mechanical installation is permitted up to 1000 m above sea level; above that elevation, output must be derated to account for lower air density. The unit uses forced cooling, so airflow through the fins must be maintained whenever the power stage is energized. Commanded velocity arrives as an analog value, and a second encoder socket supports additional spindle or motor feedback for synchronized tapping or dual-loop control. The drive is Series 3, and the housing does not accept extra interface boards.
