I have a couple of questions about the construction of the linear motion sets:
It says the rails use drill rod. Does that mean they have a thread? If yes, what for? Or is my understanding of English wrong, and a drill rod is a rod with a smooth surface?
About the linear rails and ball bearings it says that the bearings are side loaded. Is that an engineering term which expresses that the bearings are fully on the rails, but a bit sideways? Is this design due to the fact that the slide can only move along one axis?
The current design of shaft mounts uses screws to put the bearing in place. Why did'nt you simply drill a bigger hole in the angle and press the bearing inside?