In anticipation of the Dual Extruder, I replaced the X-Axes Polymer Bearings with high quality LM10U bearings, and the 10mm rods with hardened rods. What a difference. Noticeably quieter, and absolutely NO PLAY (wobble) in the truck.
Just in case I damaged the single and dual bearing holders in the process, I printed out a set and also had a set professionally printed in case my prints didn’t turn out well. My prints did, however turn out just fine.
The big problem with the Double Bearing Holder that I printed and the one I had professionally made is that there is nothing on the left hand side of the Double Bearing Holder to hold the bearing in place. It just slides right out. This happens with the Polymer bearings and the steel LM10U linear bearings.
Does the design of the Double Bearing Holder depend on using low quality prints to keep the bearing in place (I.e., prints that are not quite up to spec or rough in texture)? What is supposed to keep the bearing from sliding out? The single holder has stops on both ends. The double holder has a stop only on 1 end.
I used this design (couldn’t find the source CAD file)