What should I call it?? Mods for mostlyprintedcnc
X-Bearing
One-to-much …
@Erich_HaHaOh agree but look nicer this way
“The Snapping Cross” Those sharp internal corners are going to break pretty easily.
Yep, looks very weak for a CNC machine
It’s a poorly designed slide berring. What else.
This is just the base for further revisions. Keep criticism coming.
@Ariel_Yahni_UniKpty It is a good start three wheels will work in a triangle if evenly spaced, but you will give up considerable stability, the more berring contact surface the more stabilized it will be.
Looks like your using pinned in axles, have you considered the instability in the design of the top wheels being only supported on one side?
@Carroll_Sanders working on it
@Ariel_Yahni_UniKpty If the shaft doesn’t have to be round, and the bearings only have to slide along the lengths of the shaft, I would place a flat surface under each bearing wheel, to reduce friction, binding, and increase stability.
If the wheels need to turn on the shaft side ways consider making the contact surface on the wheel concave to fit the shafts profile.
Increasing stabilization that way.
Well…you’d reduce printingtime, and one bearing by only using 3 bearings 
Reducing to three you could call it “Mercedes bearing” or “peace glider” 
I thinks great so keep testing and iterating! I’ve fiddled with this type of setup quite a bit. You will need two of these carriages on each rod or just use three ins triangle formation. If you switch to one square tube, it will save cost and only need one tube. Be sure to offset the wheels. I would try one square tube and print a big beefy carriage in one piece- printed on its side.
Keep us posted
Brook
Is there a mate for that set of bearings?
You could probably also make one with 3 layers of laser cut material in a triangle shape, a tube hole in the middle, a cut spot for axles in te middle piece and nuts and bolts to combine the three layers. You would then still need a matching set for the other side of your sliding part.
Is that for the sides or the center? If it is the center, I think you can reduce the bearing count by relying on just 3 bearings on each pole. 2 in the front of the x bar and one in the back. 2 on the top and one on the bottom of the y bar. This is asuming that the 6 bearings are solidly connected to the object mounted to the intersection.
Looks cool, I wanna make a big one with skateboard wheels!
Pop a flat face on the end of it to stiffen up the bracket between the bearings.
wouldn’t 3 points of contact do the same thing?