Belt Roller Support Assembly in Solidworks - YouTube
Amazon.com: 4 Wheel T Trolley Assembly Electric Hoist Easy Installation Roller Trolley Silent, Four Bearing Roller Strut Channel Trolley Hardware for use with 1-5/8" Wide and All 1-5/8" or Taller Strut Channel :
HANDS ON Door Roller Assembly, 7/8 in., Convex, Plastic Tires, Steel Bracket and Ball Bearings N 7449 - The Home Depot
Roller Assembly for 72" Crankshaft Polishers| Goodson Tools & Supplies