KDA 3.1-050-3-LYS-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 3.1-050-3-LYS-U1 is a spindle drive from the KDA Spindle Drives series. It features forced cooling with a mounted heatsink blower, powered by a 115V AC source at 50-60Hz. This drive operates at a rated current of 50 Amps and accepts speed command values via a SERCOS interface.
Internal Product Review
The KDA 3.1-050-3-LYS-U1 spindle drive delivers excellent performance in high-demand applications, featuring a rated current of 50 A and a 300 VDC supply voltage. Its forced cooling via a mounted heatsink blower ensures stable operation within an ambient temperature range of 5 to 45 degrees Celsius. The integrated RS 232 C serial interface and SERCOS-based speed command value make this drive a standout choice for precise and adaptable motion control.
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Product Description:
The KDA 3.1-050-3-LYS-U1 is a spindle drive manufactured by Bosch Rexroth Indramat and assigned to the KDA Spindle Drives series. In automated machining centers, this drive supplies controlled three-phase power to high-speed spindle motors, allowing accurate torque and velocity regulation during drilling, milling, or grinding operations. Its role is to translate digital speed commands from the motion controller into regulated motor current while removing waste heat through an integral blower so that continuous duty cycles remain within thermal limits.
The power section is energized from a 300 VDC common bus, and the inverter can deliver a continuous output of 50 A for steady-state spindle loading. The heat sink blower, powered from a dedicated 115 V/50–60 Hz auxiliary line, moves forced air across the fins to stabilize semiconductor temperatures. Drive parameters are adjusted or read through a RS-232-C service port, while velocity references during normal production are received over the SERCOS interface, keeping command latency low and synchronization tight across multiple axes. An integrated heat sink blower is fitted to this model, so no external cooling ducts are required.
The unit uses forced cooling, which allows it to sustain its ratings in ambient shop conditions from 5 to 45 °C. Operation is permitted up to 1000 m above sea level without derating, matching typical plant elevations. Feedback versatility is extended by the presence of a second encoder input and synchronous input, enabling dual-loop control or spindle orientation functions when a separate position transducer is mounted on the workpiece side. The serial and SERCOS links provide separate access paths for diagnostics and recipe changes without interrupting closed-loop speed control.
