KDA 3.1-050-3-DY0-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-DY0-U1 is a spindle drive from the KDA Spindle Drives series. It operates with a DC supply voltage of 300 VDC and has a rated current of 50 Amps. The drive uses forced cooling with a mounted heatsink blower powered by a 115V AC source, and it supports digital speed command values with a 16 bit parallel format.
Internal Product Review
The KDA 3.1-050-3-DY0-U1 spindle drive from Bosch Rexroth Indramat features a forced cooling system with a mounted heatsink blower, utilizing a 115V/50-60Hz AC source to ensure stable thermal management. Its digital 16-bit parallel speed command value and support for a second encoder input deliver precise performance in demanding spindle applications. This model is well-suited for industrial environments requiring accurate and efficient spindle control.
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Product Description:
The KDA 3.1-050-3-DY0-U1 belongs to the KDA Spindle Drives series produced by Bosch Rexroth Indramat. It is a spindle drive for machine tools and automation cells, where it supplies regulated power and speed commands to high-speed motorized spindles. By combining power conversion, feedback handling, and blower control in one housing, the drive simplifies cabinet wiring and provides closed-loop spindle regulation for generation 3 motion systems. In spindle applications, closed-loop control helps maintain stable speed during load changes caused by cutting forces or tool engagement.
This unit is powered from a DC bus of 300 VDC, and its power stage can deliver a continuous output of 50 A to the connected spindle motor. Thermal management is handled by a heat sink-mounted blower that uses a single-phase supply of 115 V/50–60 Hz, and the airflow helps keep semiconductor temperatures within safe limits during heavy cutting cycles. The drive uses forced cooling, so air is actively moved across the fins instead of relying on natural convection. This arrangement supports stable thermal behavior during extended operation and repeated load changes. Speed references arrive through a 16-bit digital parallel interface, allowing the numerical controller to transmit high-resolution velocity words directly to the drive without analog drift or scaling issues. Digital command transfer also reduces the signal noise and offset problems that can affect analog reference lines in crowded electrical cabinets.
For reliable service on the plant floor, the drive operates in ambient air from 5 to 45 °C and sustains full rating up to 1000 m above sea level without derating. Control wiring includes a second encoder input and a synchronous input, which allows direct comparison of primary and secondary feedback signals or coordinated spindle-axis timing. These control connections also support synchronization tasks such as spindle orientation or phase matching with related motion axes. The design includes logic to monitor the blower supply, which reduces the need for separate external interlocks.
