The 626 Open is a high-precision miniature radial ball bearing designed for internal machinery applications where external contamination is not a factor. Manufactured without shields or rubber seals, this unshielded bearing provides completely unrestricted access to the balls and raceways. This open architecture makes it the ultimate choice for enclosed systems that utilize continuous oil bath or oil mist lubrication. With a 6mm bore, a 19mm outer diameter, and a 6mm width, it delivers absolute minimum rolling resistance and exceptional heat dissipation.