Product Description:

The KDA 3.1-050-3-D0D-W1 is a spindle drive module manufactured by Bosch Rexroth Indramat for the KDA Spindle Drives series. It forms the closed-loop power stage between a common DC bus supply and a high-speed motor, enabling precise spindle speed and orientation in machine-tool and production equipment. By converting constant link voltage into controlled three-phase output, it lets the automation controller vary torque in real time to suit cutting, drilling, or grinding demands.

The power section operates from a regulated link of 300 VDC, and the current stage can furnish up to 50 A continuously to the connected motor. Velocity data reaches the drive through a 16-bit parallel digital channel, which supplies fine setpoint resolution. Orientation commands are handled separately through a digital position command interface that synchronizes spindle indexing. This version excludes a secondary encoder port, so the primary feedback loop must close through the main encoder alone. An auxiliary blower draws its energy from an isolated 220 V, 50/60 Hz source, keeping auxiliary loads off the DC link and helping stabilize bus voltage during fluctuating spindle demand.

Thermal regulation is delivered by a mounted heat sink blower operating in forced cooling mode, so the enclosure must allow a steady airflow path. Within an ambient range of 5 to 45 °C, the unit sustains full current without derating. Installation altitude is limited to 1000 m above sea level, because thinner air reduces heat transfer at higher elevations. The unit is in series 3. Wake Industrial offers a one-year warranty on this Bosch Rexroth Indramat KDA spindle drive. International shipping options are available. For questions about error, fault, and wiring, customers can use the free chat tool available on the website.