KDA 2.1-150-3-L0I-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-L0I-U1 is part of the KDA Spindle Drives series and functions as a spindle drive. It offers a rated current of 150 Amps and operates with a DC supply voltage of 300 VDC. The unit utilizes forced cooling with a mounted heatsink blower that runs on 115V at 50-60Hz and supports a SERCOS Interface for speed command values.
Internal Product Review
The KDA 2.1-150-3-L0I-U1 spindle drive from Bosch Rexroth Indramat features a mounted heatsink blower and operates with forced cooling, delivering consistent performance in demanding environments. With a rated current of 150 A and a 300 VDC supply voltage, this drive handles high-power spindle applications efficiently. The inclusion of an incremental encoder output enhances feedback precision, making this spindle drive a strong choice for precision machining.
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Product Description:
The KDA 2.1-150-3-L0I-U1 belongs to the KDA Spindle Drives series manufactured by Bosch Rexroth Indramat. It is a spindle drive module used to regulate high-speed, high-power motor spindles found in CNC machining centers and grinding equipment. By converting the fixed DC link of a shared supply unit into a precisely controlled three-phase output, the drive provides closed-loop speed and torque control for repeatable metal-cutting and forming processes. This arrangement helps the spindle respond accurately during acceleration, steady-state running, and changing load conditions.
The heatsink blower that removes switching and motor losses is powered from an auxiliary line at 115 V/50–60 Hz, so a separate DC fan supply is not required. Cooling air is forced directly through a mounted heatsink blower, and the drive uses forced cooling to keep semiconductor temperatures within safe limits during continuous duty. The power stage draws energy from a DC bus rated at 300 VDC, and it can deliver up to 150 A of output current to the spindle motor. This current capacity supports demanding spindle acceleration and sustained cutting loads. A secondary encoder socket is omitted on this model, so only the primary feedback channel is available for position confirmation.
Installation is allowed up to 1000 m above sea level without performance reduction, and an incremental encoder output is available for downstream control tasks such as droop compensation or handwheel display. The unit maintains full functionality in ambient temperatures of 5 to 45 °C, which matches typical shop-floor conditions. All velocity commands are transmitted digitally over the SERCOS interface, ensuring deterministic communication with the machine controller. This communication method supports stable coordination between the spindle drive and the rest of the motion system.
