I used to operate a machine with ball bearings mounted in a vee setup.
Basically it was a bracket that held 4 ball bearings about 8 inches
apart. Think of a tube sliding over a smaller tube.
Instead of the tubes actually contacting, the outer race of the bearings
would touch the inner tube.
I believe they were set about 135 degrees apart so the traveler was
"captured" and couldn't lift off. That traveler part was a casting and
the bearing axles were on eccentric screws so preload could be adjusted