Bottom line
What this comparison can establish
Do not source a 2AD motor or RAC controller in isolation when the goal is a working spindle. Record both sides of the system and the machine function.
Main-spindle system guide / motor plus controller
2AD Motor and RAC Spindle-Drive Matching
A 2AD motor and RAC controller operate as a spindle system. The motor winding, cooling, feedback and mechanics must be reviewed with the controller current, command interface, programming and machine requirements.
Side-by-side identity
What each product label must tell you
- Role
- Regulated asynchronous main-spindle motor family with cooling, feedback and mechanical selections.
- Verify
- Complete motor code, winding, cooling, feedback, shaft/flange and installed accessories.
- Do not assume
- A 2AD frame and power estimate do not identify the full motor configuration.
- Role
- Main-spindle controller family that must be considered with motor and machine programming context.
- Verify
- Complete controller code, current/voltage, command interface, firmware or programming module and motor pairing.
- Do not assume
- A RAC base-controller match does not prove the spindle system is configured correctly.
Decision path
Turn the cabinet into a useful evidence set
Which motor is on the spindle?
Capture: Capture the entire 2AD label plus cooling, feedback and mechanical interfaces.
Then: Identify the exact motor selection before comparing controllers.
Which RAC controller drives it?
Capture: Capture controller, firmware/programming and command-interface labels.
Then: Compare controller and motor as a documented pair.
What does the machine expect?
Capture: Record machine model, spindle function, speed range, feedback cable and fault sequence.
Then: Preserve machine-specific startup and programming requirements.
Official manufacturer records
Use the edition that matches the installed hardware.
Verified downloads open on the manufacturer’s site. Other references open a library entry with assistance options. Confirm the applicable edition, physical nameplate and machine documentation.
R911260576Rexroth 2AD Asynchronous Motors - Project Planning Manual
Factory documentation for 2AD cooling, feedback, mechanical interfaces and main-spindle system planning.
View document reference →241629AC Main-Spindle Drives with Regulated 2AD Motors - Selection GuideReference for 2AD motor and main-spindle controller system selection.
View document reference →RAC project-planning manual searchRAC Main-Spindle Controller DocumentationReference for RAC controller interfaces, programming and system planning.
View document reference →Common questions
Before you request a configured match
Can I request only the 2AD motor?
Yes, but include the RAC controller and machine context so the requested motor can be checked against the installed spindle system.
Why does cooling matter?
Cooling configuration is part of the motor selection and installation; it must remain in the comparison.
What if the programming label is missing?
Send controller, cabinet and machine documentation photos and state what is missing. Do not guess a firmware or programming match.
Availability · repair · exchange
Send the complete code.
The suffix can change electrical and mechanical compatibility. Include every character and a clear nameplate photo.