RAC 3.5-100-460-A00-W1-220 Bosch Rexroth Indramat
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MPN: R911256090
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The Bosch Rexroth Indramat RAC 3.5-100-460-A00-W1-220 is an AC Main Spindle Drive Controller from the RAC Spindle Drive Controllers series. It features an internal blower for cooling, uses an analog speed command of plus or minus 10 Volts, and connects to a rated voltage of 3 x AC 400 V or 3 x AC 460 V. The device includes a 9-pole X4 interface terminal and accepts an AC 230 V supply for control electronics.
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Product Description:
The RAC 3.5-100-460-A00-W1-220 is a spindle drive unit produced by Bosch Rexroth Indramat and supplied within the RAC Spindle Drive Controllers series. It regulates motor power, speed, and direction so machine-tool spindles can maintain stable cutting conditions in automated machining centers, grinders, and high-speed assembly stations. The drive combines power electronics with feedback-ready interfaces to support precise response during changing load conditions. That control behavior helps the spindle hold the commanded speed when tool engagement changes during drilling, milling, or grinding. This model also supports multiple incoming voltage configurations for use in different industrial power systems.
It draws power from a three-phase supply of 3 x AC 400 V at 50 Hz with ±15% tolerance or 3 x AC 460 V, covering common European and North American distribution networks. The control electronics are supplied by AC 230 V at 50-60 Hz, which keeps the low-power control section separate from the main switching supply. Thermal management relies on a built-in internal blower, so cabinet air moves through the heat sink fins without external ducting. Motion commands are received as an analog (±10 V) velocity reference, allowing direct connection to classic CNC or PLC controllers that scale spindle speed through a simple voltage signal. Field wiring terminates on connector X4 with 9 poles, providing a fixed pinout for enable, fault, and status chains.
The unit is supplied without an additional bleeder, so regeneration energy must be handled by the internal circuitry or by an external resistor in the cabinet. In applications with frequent deceleration, the cabinet design must account for returned energy so the DC link remains within its operating range. It is an AC main spindle drive controller intended for turning, milling, and grinding duties that require quick torque response. Within the product naming scheme, it carries series code 3 and version 5, which help identify the unit within the RAC family.
