KDA 2.1-150-3-L0D-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-L0D-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. It uses forced cooling with a mounted heatsink blower powered by a 115V AC source, and features a digital position command value interface. The drive is designed to operate in ambient temperatures from 5 to 45 degrees Celsius up to elevations of 1000 meters above sea level.
Internal Product Review
The KDA 2.1-150-3-L0D-U1 spindle drive from Bosch Rexroth Indramat stands out with a 150 A rated current and forced cooling via a mounted heatsink blower, ensuring dependable performance in demanding environments. Its SERCOS interface for speed command and digital position command input supports precise and flexible motion control. Overall, this drive delivers strong output and efficient cooling for high-performance spindle applications.
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Product Description:
The KDA 2.1-150-3-L0D-U1 is a regulated spindle drive built by Bosch Rexroth Indramat for the KDA Spindle Drives series. This unit mounts inside the drive cabinet of CNC machines and woodworking centers, where it converts intermediate-bus energy into controlled three-phase power for high-speed motor spindles. By linking to numerical controls, it supplies rapid torque changes and precise velocity regulation, supporting metal cutting, drilling, and grinding sequences in automated production lines. The regulated output helps the spindle follow commanded speed changes during acceleration, load variation, and orientation tasks.
For power integration, the drive connects to a DC bus rated at 300 VDC, which provides the operating voltage for the transistor bridge. The armature path can deliver up to 150 A of continuous current, enabling large-frame spindle motors to reach full load without derating during sustained machining. Thermal energy is removed by a mounted heat sink blower fixed to the backplate, and the fan motor draws from an auxiliary source of 115 V/50-60 Hz. This arrangement provides forced cooling, helping the drive maintain stable internal temperature during long roughing passes, repeated starts, and frequent speed reversals.
Command data reach the unit through a SERCOS interface that transmits speed commands, while a separate channel accepts a digital position command value for orientation tasks such as tool-change alignment. There is no second encoder input, so spindle positioning feedback is expected from the primary motor sensor alone. The drive operates within an ambient range of 5 to 45 °C and can be installed at elevations up to 1000 m above sea level. These operating limits apply to properly ventilated cabinet installations where the blower can move air across the heat sink without obstruction.
