RAC4.3-300-460-A0D-W1 Bosch Rexroth Indramat
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MPN: R911267025
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The Bosch Rexroth Indramat RAC4.3-300-460-A0D-W1 is part of the RAC Spindle Drive Controllers series. This AC main spindle drive controller operates with a controller current class of 300 Amps and features a built-in cooling unit. It is designed for 3-phase AC power input and supports an analog ±10 V set-point interface with a 16-bit parallel position value.
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Product Description:
The RAC4.3-300-460-A0D-W1 is a spindle drive controller manufactured by Bosch Rexroth Indramat and assigned to the RAC spindle drive controller series. It is used in CNC machining centers to regulate torque, speed, and orientation of main spindles so that tool changes, tapping, or rigid-threading tasks follow programmed profiles without mechanical drift. The unit links directly to higher-level numerical controls, converting commanded velocity or torque references into regulated motor power for induction or synchronous spindle motors.
The controller is designed for mains supplies of 3 × AC 400 V/50 Hz; 460 V/60 Hz, letting it operate on common European or North American plant power without an external transformer. Within this supply envelope, the internal power stage falls under the 300 A current class, indicating the continuous armature current that can be delivered to the spindle motor windings. Thermal management is handled by a built-in cooling unit, so the drive can be panel-mounted without a separate heat exchanger or cabinet fan array. Command values arrive through an analog ±10 V set-point interface, giving PLCs and numerical controls a straightforward voltage channel for speed or torque modulation while maintaining high resolution over the full reference range.
The power section is arranged for 3 input phases, matching the industrial mains topology and simplifying breaker and contactor selection. Position feedback from external measuring systems feeds a 16-bit parallel rated position value interface, allowing fine spindle orientation during tool clamping cycles. Because there is no additional bleeder, excess regenerative energy must be redirected by the machine’s mechanical load or an external resistor bank if rapid deceleration is expected. The design also provides no additional encoder input, so all positional data are processed through the primary interface cited above. The unit is part of the RAC Spindle Drive Controllers line and is intended for high-current main-spindle applications.
Frequently Asked Questions about RAC4.3-300-460-A0D-W1:
Q: What is the controller current class for the RAC4.3-300-460-A0D-W1 spindle drive?
A: The RAC4.3-300-460-A0D-W1 is rated for a controller current class of 300 A.
Q: What type of cooling method does the RAC4.3-300-460-A0D-W1 utilize?
A: This model uses a built-in cooling unit for temperature management.
Q: What mains voltage and phase are needed for the RAC4.3-300-460-A0D-W1?
A: The RAC4.3-300-460-A0D-W1 requires a 3-phase AC supply and supports 400 V at 50 Hz or 460 V at 60 Hz.
Q: What set-point interface does the RAC4.3-300-460-A0D-W1 support?
A: The set-point interface on this model is an analogue ±10 V input.
Q: What is the position interface specification for the RAC4.3-300-460-A0D-W1?
A: The RAC4.3-300-460-A0D-W1 features a rated position value interface with a 16-bit parallel configuration.
