KDA 3.1-100-3-DQ0-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-DQ0-U1 is a spindle drive from the KDA Spindle Drives series with a rated current of 100 Amps and a DC supply voltage of 300 VDC. It uses a mounted heatsink blower for forced cooling and operates within an ambient temperature range of 5 to 45 degrees Celsius. The drive is designed for elevations up to 1000 meters above sea level and accepts digital 16-bit parallel speed command values.
Internal Product Review
The KDA 3.1-100-3-DQ0-U1 spindle drive from Bosch Rexroth Indramat delivers steady performance with a rated current of 100 A and a 300 VDC supply, making it well-suited for demanding spindle control tasks. Its forced cooling system with a mounted heatsink blower ensures consistent operation within a 5 to 45 degrees Celsius ambient temperature range. This model stands out for reliable, high-capacity spindle drive functionality in industrial environments.
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Product Description:
The KDA 3.1-100-3-DQ0-U1 spindle drive is produced by Bosch Rexroth Indramat and belongs to the KDA Spindle Drives series. Designed for high-speed machining centers, the unit converts a regulated DC bus into three-phase output for synchronous or induction spindles while housing its own heatsink blower. Within an automation cabinet, it interfaces with the drive controller stack and supplies current to the attached motor so that rapid acceleration, controlled braking, and stable speed loops can be achieved during milling, drilling, or grinding operations. This arrangement supports spindle service in machine tools that must move quickly between idle speed, tool engagement, and sustained cutting without losing rotational stability.
This drive draws auxiliary blower power from a separate 115 V, 50–60 Hz AC tap, which keeps cooling performance independent of spindle load. Power for the inverter arrives on a shared 300 VDC intermediate circuit that can also supply other KDA modules in the same cabinet. Under rated conditions, the drive can deliver 100 A of continuous output current for large-diameter tool acceleration and steady cutting duty. Thermal management relies on forced cooling delivered through a mounted heat sink blower, which removes waste heat from the finned extrusion during sustained operation. The separate blower supply also helps maintain consistent airflow when spindle demand changes rapidly during repeated speed shifts.
The permissible ambient temperature range is 5 to 45 °C, which suits typical enclosed industrial cabinets with controlled airflow. Installation is permitted up to 1000 m above sea level without power derating, allowing use in most standard plant locations. Speed commands are accepted as a digital 16-bit parallel word, allowing precise velocity references without analog drift when the controller changes spindle setpoints. The drive has no additional interface option, so its terminal points remain fixed in the standard configuration.
