Product Description:

The KDA 3.1-050-3-L0S-W1 is a spindle drive produced by Bosch Rexroth Indramat and supplied in the KDA Spindle Drives series. It is intended for machine-tool spindles where closed-loop speed regulation and high-frequency setpoint updates are required. Within an automation cell, the unit receives digital commands from a motion controller and delivers three-phase power to the attached motor. Current regulation and diagnostic feedback help the spindle maintain commanded velocity under changing cutting loads. This operating profile suits machining processes that need stable speed during drilling, milling, and similar continuous-duty work.

This model is energized from a DC bus held at 300 VDC, and its power section can supply up to 50 A of continuous output current to the motor windings. A dedicated heat sink blower, fed by an auxiliary line of 220 V/50-60 Hz, forces air across the cooling fins; the assembly uses a mounted heat sink blower with forced cooling. The current capacity supports sustained spindle demand, while the blower path carries heat away from the switching components. This arrangement helps the drive remain thermally stable during extended machining cycles. The drive does not include a second encoder input, which keeps wiring simpler when only the primary spindle encoder is used.

For plant integration, a serial interface (RS-232-C) is available for setup and service access, while high-speed velocity references enter through the SERCOS interface. This arrangement separates local communication from real-time motion traffic. The electronics are specified for ambient temperatures from 5 to 45 degrees Celsius and can maintain full performance up to 1000 m above sea level. This operating range fits typical enclosed machine cabinets on the shop floor. The drive does not include an extra encoder port, so the feedback layout remains focused on the primary spindle encoder.