KDA 3.3-100-3-D0I-W1 Bosch Rexroth Indramat
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MPN: R911268610
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The Bosch Rexroth Indramat KDA 3.3-100-3-D0I-W1 is a spindle drive from the KDA Spindle Drives series. It provides a rated current of 100 Amps and operates with a DC supply voltage of 300 VDC. The unit features a mounted heatsink blower for forced cooling and supports incremental encoder output with a digital 16-bit parallel speed command value.
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Product Description:
The Bosch Rexroth Indramat KDA 3.3-100-3-D0I-W1 spindle drive belongs to the KDA Spindle Drives series and is intended for coupled CNC axes. It receives a digital speed command from the machine controller, regulates three-phase current for the spindle motor, and returns position data to the control loop through incremental feedback. By combining power switching, status monitoring, and integrated blower-assisted thermal management in one unit, it supports rapid startup, controlled braking, and stable spindle operation in milling, drilling, and routing equipment. This arrangement lets the drive handle both power conversion and motion-response tasks without requiring separate external interface hardware for normal spindle control.
The drive operates from a regulated DC link of 300 VDC, and its transistor bridge can supply up to 100 A to the connected spindle. Heat is removed by a mounted blower powered from 220 V/50-60 Hz, and the unit uses forced cooling to keep semiconductor temperatures within acceptable limits during sustained cutting duty. Command information is accepted through a 16-bit parallel digital input, which transfers the speed reference across sixteen simultaneous signal lines for fast response. That input structure helps the drive react quickly to changing speed commands while maintaining smooth regulation during acceleration, deceleration, and steady operation. The result is precise spindle control across a wide working range without adding unnecessary communication overhead inside the motion system.
The electronics are rated for ambient air from 5 to 45 degrees Celsius and for installation up to 1000 m above sea level without adjustment. For feedback distribution, the drive provides an incremental encoder output so the CNC control or connected monitoring equipment can receive actual spindle position directly from the unit. There is no second encoder input, so any redundant feedback path must be provided elsewhere in the machine. These installation limits and interface points should be considered when the drive is placed in enclosed cabinets, high-speed spindle systems, or multi-axis machining platforms.
