V Groove Bearing, 10 PCS V624ZZ Metal V Groove Ball Bearing Wheel with Straight Roller Bearing Pulley for Rail Track Linear Motion System (4×13×6mm ): Amazon.com: Industrial & Scientific
Ball Beairngs that have 0.5 Inch OD outer Diameter
Radial insert ball bearing | PACH Systems
Axial-Rillenkugellager in Edelstahl ( Niro-Axiallager ) S-51106 nach DIN 711. Einseitig wirkendes NIRO-Axial-Rillenkugellager (30 x 47 x 11 mm) aus rostfreiem Edelstahl. SS51106. | Sturm Kugellager Shop