Reddit reviews uxcell 6pcs 48x32mm Flange Mount Conveyor Roller Ball Bearings Transfer Units
We found 2 Reddit comments about uxcell 6pcs 48x32mm Flange Mount Conveyor Roller Ball Bearings Transfer Units. Here are the top ones, ranked by their Reddit score.
Product Name : Ball Transfer Unit;Material : MetalFixing Hole Diameter : 4mm / 0.16";Hole Distance : 38mm/1.5"Ball Diameter : 16mm / 0.63";Total Size (Approx.) : 48x 32 x 20mm / 1.9" x 1.2" x 0.8" (L*W*H)Color : Silver Tone;Weight : 246gPackage Content : 6 x Ball Transfer Unit
I don't know if it's the correct name, but it's a conveyor roller. Usually go on "conveyor" lines so boxes and things can roll along it in more than one direction.
https://www.amazon.com/48x32mm-Flange-Conveyor-Bearings-Transfer/dp/B00XP5H5S2
A center bearing design will be more difficult than a perimeter bearing design. Wood as a rolling surface will create problems as the wood grains crush, creating little ripples for the bearings to roll over. If you can get a metal plate, say 3/16" thick, then you can bolt flange roller bearings like this: https://www.amazon.com/48x32mm-Flange-Conveyor-Bearings-Transfer/dp/B00XP5H5S2 to the bottom of a plywood disc, and have them roll on the metal plate. This will reduce the rolling friction significantly, thus reducing the power needed in how you rotate it.