KDA 3.1-100-3-D0S-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 3.1-100-3-D0S-U1 is part of the KDA Spindle Drives series and is designed as a spindle drive with a rated current of 100 Amps. This model is cooled by a mounted heatsink blower with forced cooling and operates on a DC supply voltage of 300 VDC. It features a serial interface, digital 16-bit parallel speed command value, and can be installed at elevations up to 1000 meters above sea level.
Internal Product Review
The KDA 3.1-100-3-D0S-U1 spindle drive from Bosch Rexroth Indramat offers a reliable 100 A rated current and operates with a 300 VDC supply voltage for demanding spindle control applications. Forced cooling is provided by a mounted heatsink blower with a 115V/50-60Hz AC source, supporting efficient thermal management in continuous operation. The integration of a serial RS 232 C interface ensures straightforward communication and diagnostics, making this drive an excellent solution for modern machining systems.
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Product Description:
Bosch Rexroth Indramat’s KDA 3.1-100-3-D0S-U1 is a spindle drive from the KDA Spindle Drives series used for high-speed machining and turning centers. The unit converts the regulated DC link supplied by an external power supply into synchronized three-phase output for a motorized spindle while supervising speed and torque. By integrating drive control, power electronics, and dedicated cooling hardware, it allows machine controllers to command precise spindle velocities required in automated production lines.
The drive draws a continuous current of 100 A, giving it the headroom to accelerate large spindle masses without exceeding thermal limits. Internally it is supplied from a bus voltage of 300 VDC, so component spacing and insulation are designed for that potential. Cooling is active; the electronics are kept within operating limits by forced cooling, which channels air through the power stack and heat sink. The blower itself receives utility power at 115 V 50/60 Hz, eliminating the need for a separate low-frequency transformer inside the cabinet. The drive receives its target speed through a digital 16-bit parallel command, allowing the CNC control to transmit exact velocity words without analog drift.
Monitoring and diagnostics can be accessed through an RS-232 C serial port, enabling parameter uploads and fault logging from a laptop or HMI without opening the enclosure. Thermal management is supported by the mounted heatsink blower, so the drive may be placed beside other heat-generating modules without requiring extra ductwork. Reliable performance is specified for ambient temperatures from 5 to 45 °C, covering common machine shop environments. Installation elevation is limited to 1000 m; above this altitude, thinner air lowers cooling efficiency and may require current derating.
