Final version:
Note that I got rid of the recess. That was because ultimately the distance of the tube from the plate is driven by the need to allow clearance for the Y belt. It would take a further redesign to get this sorted out, and it’s likely a major change since it involves new belt geometries, and not just an optimized block.
Note in the assembly how the bearings are retained by zip ties, but the zip ties are non-load bearing. The two screws at the top adjust the pressure on the rail, and from my tests I can build an unreasonable amount of force.
Smooth like silk!
It comes in two variants, a 1/2EMT to a little larger than 1", and a little smaller than 1" to 1.25". The reason there’s some overlap is so that one size bearing block can do an entire assembly. If it’s for a small lowrider, then 1/2 EMT for the Z and 3/4 EMT for the X. And if it’s for a large lowrider, then 3/4 EMT for the Z and 1" for the X. And if it’s for a large, stiff build, then 1 EMT for the Z and 1.25", for the X.
Getting close to assembling this thing!