LR5000NPPU Track Roller 2-Row Bearing Sealed 10x28x12 Track Bearing Ball Diameter - 1 inch (1") These tiny bearings punch above

These tiny bearings punch above their size in precision builds:

51114 Ball Bearing

🟢 Lubrication: Factory Greased - Self-Lubricating

Races Material: Zirconia (ZrO₂) Ceramic

the 6303ZZETXMM inner diameter is 17mm

LR5000NPPU Track Roller 2-Row Bearing Sealed 10x28x12 Track Bearing Ball Diameter - 1 inch (1") These tiny bearings punch aboveLR5000NPPU Track Roller Double Row Ball Bearing 10mm x 28mm x 12mm One Bearing LR5000NPPU Track Roller Double Row Ball Bearing, bearing is a Sealed, Bearing inner diameter is 10mm, Bearing outer diameter is 28mm and Bearing width is 12mm. LR5000NPPU Bearing Track Roller Double Row Bearing Size: 10mm x 28mm x 12mm Bearing inner Diameter: 10mm Bearing outer Diameter: 28mm Bearing width : 12mm Dynamic Load Rating Cr: 4750 N Static Load Rating Cor: 2850 N