KDA 2.1-150-3-DPD-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-DPD-U1 is a spindle drive from the KDA Spindle Drives series. It has a rated current of 150 Amps and operates with a 300 VDC supply voltage. The drive uses a mounted heatsink blower for forced cooling and supports digital position and speed command values.
Internal Product Review
The KDA 2.1-150-3-DPD-U1 spindle drive from Bosch Rexroth Indramat features a forced cooling system with a mounted heatsink blower powered by a 115V AC source, ensuring excellent thermal management. The unit delivers a rated current of 150 A and supports digital 16-bit parallel speed command value for precise spindle control. This spindle drive stands out for its reliable performance in demanding industrial environments.
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Product Description:
The KDA 2.1-150-3-DPD-U1 spindle drive is manufactured by Bosch Rexroth Indramat as part of the KDA Spindle Drives series. It acts as a closed-loop power stage for high-speed machining spindles, translating NC commands into torque and speed regulation. By providing integrated power electronics, field connections, and onboard cooling, the unit simplifies installation in machining centers and similar automation platforms. Within an Indramat motion system, it receives setpoints from a CNC controller and supplies regulated three-phase output to spindle motors designed for demanding duty cycles.
It draws its DC link energy from a regulated bus at 300 VDC, and the current path is dimensioned for a continuous output of 150 A, allowing acceleration of large-inertia tool spindles without current limiting. Thermal stability is maintained by a heat sink assembly that uses a blower powered from an auxiliary source rated at 115 V/50–60 Hz; this dedicated circuit separates the cooling load from the DC bus. Speed reference data arrive over a parallel interface with a 16-bit word length, enabling fine resolution in velocity control. Because dissipated heat is removed through forced cooling, cabinet temperatures remain stable during milling. The power section remains operational in an ambient range of 5 to 45 °C, so no derating is required for typical factory floor climates.
The drive keeps its thermal margin up to 1000 m above sea level; sites higher than this require external derating calculations. For coordinated motion, it accepts a dedicated position command value line in addition to the speed channel, letting CNC software switch between velocity and positional modes. A second encoder socket is provided when simultaneous spindle feedback or auxiliary motor monitoring is required, integrating that channel without extra interface cards. The control hardware is identified as Series 2.
