KDA 2.1-150-3-AYS-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 2.1-150-3-AYS-U1 is a spindle drive from the KDA Spindle Drives series with a rated current of 150 Amps and a DC supply voltage of 300 VDC. This drive features forced cooling with a mounted heatsink blower that uses a 115V AC source, and supports a serial RS 232 C interface as well as a second encoder and synchronous input. It operates within an ambient temperature range from 5 to 45 degrees Celsius and can be installed up to 1000 meters above sea level.
Internal Product Review
The KDA 2.1-150-3-AYS-U1 spindle drive from Bosch Rexroth Indramat features a high rated current of 150 A and operates with a DC supply voltage of 300 VDC, making it suitable for demanding spindle applications. Forced cooling via a mounted heatsink blower ensures efficient thermal management, while a serial interface (RS 232 C) allows for streamlined connectivity. This drive stands out for its combination of reliable performance and advanced interface options.
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Product Description:
The KDA 2.1-150-3-AYS-U1 spindle drive is produced by Bosch Rexroth Indramat within the KDA Spindle Drives series. It is an AC power inverter designed to run high-speed machining spindles in CNC machine tools and automated production lines. By modulating the DC bus voltage into a three-phase output, the unit lets the motion controller regulate spindle speed and torque precisely for cutting, drilling, or grinding tasks. Because it is intended for spindle service, it suits applications where speed stability directly affects part quality. Its role is to convert control commands into controlled electrical output for the motor while responding to changing cutting loads.
The power stage is supplied from a common bus at 300 VDC, and it can sustain up to 150 A of armature current to drive large-frame induction or synchronous spindle motors. That current capacity gives the drive enough headroom for demanding spindle acceleration and sustained cutting loads. Thermal loading from this current is managed by a dedicated heat sink blower that runs on 115 V at 50/60 Hz auxiliary power. Airflow across the heat-dissipating fins uses forced cooling, which helps keep the semiconductor modules within their intended temperature range during continuous operation. Speed references arrive as an analog command voltage, allowing the connected CNC controller to change spindle velocity smoothly across the working range.
System integration includes an RS-232-C serial interface for parameter access and fault logging. The serial port also supports direct access to stored settings and diagnostic information during service. For applications that need dual-channel feedback, the drive provides a second encoder input and synchronous input, supporting redundant position monitoring or coordinated operation with external axes. The added feedback connection is useful when synchronization with another rotating axis is required. The unit can operate in ambient temperatures from 5 to 45 °C and at elevations up to 1000 m above sea level. This temperature and altitude range supports use on typical factory floors.
