I just bought a set of those bearings for my printer. Even from US source they are nearly ~50USD. I just bit the bullet and bought them. Once my replacement hot end comes in it looks like I will be designing a new carriage and effector for this printer. The design I am using is unnecessarily heavy and large. It looks like I will be buying some metric bolts to get this done. As for linear motion, it looks like I will be sticking to smooth rods for now. In my second printer version I may do something else entirely to reduce the cost and increase stiffness.
The traxxas rod ends, looking back at them are no where near the precision required. I can see the effector rocking just in slop. Causes +-.2mm shake on the printer just due to the rod ends.
The traxxas rod ends, looking back at them are no where near the precision required. I can see the effector rocking just in slop. Causes +-.2mm shake on the printer just due to the rod ends.