Product Description:

The KDA 1.1-100-300-W1-115V spindle drive is manufactured by Bosch Rexroth Indramat and belongs to the KDA Spindle Drives series. It serves as the power interface between a DC bus and the three-phase windings of a machine-tool spindle motor, enabling accurate regulation of rotational speed and torque in automated machining cells. When paired with compatible motion control hardware, the unit supports drilling, milling, and grinding processes by delivering responsive current control during changing cutting loads. Stable regulation helps the spindle recover quickly when tool engagement varies, which is important in contouring and finish operations. Fast response also helps reduce speed droop during sudden load changes at the cutting edge.

Its operating environment is specified for ambient air between 5 to 45 °C, allowing the electronics to maintain rated parameters without supplemental cabinet cooling. Thermal energy is removed through a mounted heat-sink blower, and airflow is intensified by the drive’s forced cooling method to prevent heat buildup during long production shifts. The power stage is fed from a common DC link held at 300 VDC, which the converter chops into variable-frequency output for the attached motor. The current path is sized for 100 A, giving the spindle enough headroom for rapid acceleration and changing cutting conditions without early current limiting. This arrangement lets the inverter match motor frequency to the commanded spindle speed while maintaining controlled torque output across a broad operating range.

The unit can be mounted in panels at elevations up to 1000 m above sea level without derating, so normal cooling performance is retained at typical industrial sites. It exchanges position and velocity commands with higher-level controllers to keep the tool shaft synchronized with programmed feed motion during machining. Its cabinet-friendly form helps integrate the drive into existing machine layouts without requiring unusual placement. In machines that coordinate spindle motion with axis feed, the control section can adjust speed references in real time as process conditions change.