RPM DC motor using CD panel ...

What’s the best way to turn a high-powered brushless DC motor optimized for hobby use into a decent low-RPM generator? Do you take a purely mechanical approach and slap a gearbox on the shaft?

[Raynerd] wanted a new spindle for his CNC machine and thought that a brushless DC motor would be a great platform to build from. [Raynerd] started with an off the shelf motor that had an 8mm shaft.