MAEDLER tapered roller bearing 30310 inner-ø 50mm outer-ø 110mm height 29,25mm SKU: 30310-MAE - Maedler North America
HK5020 Drawn Cup Needle Roller Bearings, Open End, 50mm I.D., 58mm OD, 20mm Width 2pcs - Walmart.com
IIVVERR 80mm x 30mm x 50mm Polyurethane Pinch Roller Rolling Wheel for Woodworker (80 mm x 30 mm x 50 mm Rodillo de rodillos de poliuretano para el carpintero - - Amazon.com
CROSW5 | Roller Carriers - 25 or 50 mm Width | MISUMI | MISUMI
IIVVERR 50mm Long 20mm Diameter Wheel Single Roller Window Sash Sliding Pulley (50 mm de largo 20 mm de diámetro rueda de rodillo simple ventana SPolea deslizante de ceniza - - Amazon.com