KDA 3.1-100-3-A0S-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 3.1-100-3-A0S-U1 is a spindle drive from the KDA Spindle Drives series. It has a rated current of 100 Amps and operates with a DC supply voltage of 300 VDC. The unit uses a mounted heatsink blower with forced cooling and supports an ambient temperature range of 5 to 45 degrees Celsius.
Internal Product Review
The KDA 3.1-100-3-A0S-U1 spindle drive from Bosch Rexroth Indramat delivers a rated current of 100 A and operates with a 300 VDC supply voltage, making it suitable for demanding spindle control tasks. Its forced cooling system, featuring a mounted heatsink blower powered by a 115V AC source, ensures reliable thermal management during continuous operation. This drive stands out for its efficient cooling and high current capacity within the KDA series.
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Product Description:
The KDA 3.1-100-3-A0S-U1 is a spindle drive built by Bosch Rexroth Indramat within the KDA Spindle Drives series. It acts as the power and control stage between a supply module and a high-speed motorized spindle, converting intermediate circuit voltage into precisely regulated three-phase output for machining centers, grinders, and milling heads. This arrangement allows the spindle to maintain stable speed and torque during changing cutting conditions, which helps support consistent machining performance across a wide operating range.
This model operates from a direct-current link of 300 VDC and is dimensioned to deliver a continuous output of 100 A. Thermal energy from the internal power semiconductors is removed by a mounted heat sink blower. The blower is supplied with 115 V/50–60 Hz mains power, and the overall assembly uses forced cooling to keep semiconductor junction temperatures within normal operating limits. Rated performance is maintained in ambient conditions from 5 °C up to 45 °C, provided the drive is installed inside a control cabinet with unobstructed airflow across the cooling fins.
An integrated RS-232 C serial interface permits parameter download, fault logging, and drive tuning from a host CNC or external terminal. Drive functions can be set through an analog speed command channel, which suits legacy control architectures that use ±10 V velocity references. The hardware supports installation heights up to 1000 m above sea level without derating, although additional cooling is recommended at higher elevations. There is no second encoder input, so closed-loop speed and position control must rely on the primary spindle encoder alone. This control layout is suitable for applications that require stable spindle regulation and straightforward electrical integration.
