KDA 2.1-050-3-D0S-W1 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 2.1-050-3-D0S-W1 is a spindle drive in the KDA Spindle Drives series. It features a mounted heatsink blower with forced cooling, operates with a DC supply voltage of 300 VDC, and has a rated current of 50 Amps. The drive supports a digital speed command value and includes a serial interface (RS 232 C).
Internal Product Review
The KDA 2.1-050-3-D0S-W1 spindle drive from Bosch Rexroth Indramat features forced cooling with a mounted heatsink blower and supports a 220V/50-60Hz AC source for efficient heat management. Its rated current of 50 A and a 300 VDC supply voltage enable reliable performance in demanding spindle applications. The inclusion of a serial interface (RS 232 C) ensures straightforward connectivity for system integration.
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Product Description:
The KDA 2.1-050-3-D0S-W1 spindle drive module is produced by Bosch Rexroth Indramat for the KDA Spindle Drives series. It converts DC bus energy to variable-frequency, variable-voltage output so a machine-tool spindle follows commanded speed profiles with closed-loop accuracy. Installed in multi-axis racks, the drive acts as the dedicated power stage between the control system and a synchronous or induction spindle motor. This arrangement supports regulated spindle operation during machining, drilling, and other speed-sensitive processes. It is intended for machine-tool installations that require repeatable spindle speed control across changing load conditions.
The drive operates from a bus link of 300 VDC, delivering up to 50 A of continuous phase current to the spindle. A dedicated heat sink blower powered by 220 V/50–60 Hz AC pushes air through the fins, and forced cooling helps keep the power semiconductors within their thermal limits during long cutting cycles. Speed reference data arrive through a 16-bit parallel digital interface, allowing the CNC to send absolute velocity words without the noise and resolution loss associated with analog signals. This electrical arrangement supports stable spindle acceleration and direct command transfer from the control system.
The drive is Version 2 and includes a Serial interface (RS 232 C) for parameter access, trace capture, and alarm diagnostics, while the second-encoder port is omitted to reduce unused circuitry. Installation is permitted at heights up to 1000 m above sea level, and reliable operation is specified for ambient temperatures of 5 to 45 °C. The mounted heat sink blower is fixed to the rear plate so cabinet exhaust air follows a defined path and avoids recirculation. This rear-mounted airflow path helps move warmed air away from the power section during continuous spindle use.
