KDA 3.1-100-3-AP0-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-AP0-U1 is a spindle drive from the KDA Spindle Drives series. It features a rated current of 100 Amps and operates with a 300 VDC supply voltage. Forced cooling is achieved through a mounted heatsink blower powered at 115V, and the unit supports a speed command value in analogue form.
Internal Product Review
The KDA 3.1-100-3-AP0-U1 spindle drive from Bosch Rexroth Indramat utilizes a forced cooling system with a mounted heatsink blower powered by a 115V/50-60Hz AC source. With a rated current of 100 A and support for analogue speed command values, this drive is well-suited for demanding spindle applications. Its second encoder input enables precise spindle or additional motor feedback, making it a versatile choice for high-performance environments.
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Product Description:
The KDA 3.1-100-3-AP0-U1 spindle drive is produced by Bosch Rexroth Indramat within the KDA Spindle Drives series. Classified as generation 3 electronics, it regulates asynchronous or synchronous spindle motors used in CNC milling, turning, and grinding equipment. The drive accepts analog speed references from the numerical control and closes internal current and velocity loops to maintain commanded spindle behavior. By integrating the power section, control section, and a heat sink blower in one chassis, it reduces panel space and simplifies installation in machine tool cabinets. This arrangement supports stable spindle operation during changing cutting loads.
The power stage is energized from a common DC bus at 300 VDC, and it can deliver a continuous output of 100 A for rapid acceleration and deceleration of large spindles. Thermal management depends on an auxiliary blower fed by 115 V/50-60 Hz mains power; combined with the drive’s forced cooling mode, this airflow keeps semiconductor temperatures within operating limits during heavy cutting cycles. Speed regulation is commanded through an analog reference signal, so the unit can be connected directly to standard ±10 V CNC outputs without serial fieldbus hardware. All logic and feedback processing is handled internally because the order code specifies no additional interface option beyond the base terminals.
The drive uses a mounted heat sink blower that supports full current delivery across an ambient range of 5 to 45 degrees Celsius without derating. Installation is approved up to 1000 m above sea level, allowing operation at typical plant elevations. A second encoder input is available for spindle position feedback or for an additional motor encoder, which supports applications such as gear-shifted spindles or synchronized auxiliary axes. The base terminal arrangement supports these functions without requiring an extra option card.
