I have a sculpture that is designed to rotate over 3 axes at max. 30RPM and is mounted on an aluminium disc. My plan is to use 3 of these geared steppers and secure the sculpture to the Z-axis shaft, but it's not quite clear to me how to (economically) secure the motors and the load to provide 3-axis movement. I see that the maximum radial and axial loads are around 150N, and because the load is around 8kg, I could perhaps save myself from using additional bearings and just rely on the bearings in the gearboxes. Is it correct that if the load is accelerated and decelerated slowly (<1.88m/s^2), the 150N force limits won't likely be exceeded?
My current plan is to mount the Y-axis motor to the shaft of the X-axis motor using a shaft flange like this:
Similar for the Z-axis motor. However, the force figures of these flanges are usually not provided. Also there doesn't seem to be a good way to limit axial movements of the flange. I've thought about using circlips, but I'm not sure if they have sufficient strength to resist a 8kg load.
Does anyone know of a good way (or a good reference) for providing 3-axis movement to a 8kg load? Is it reasonable to expect the bearings in the gearboxes to adequately support the load, given the 150N axial and radial force ratings?
Any advice appreciated.