The 6704 is an ultra-lightweight, unsealed single row ball bearing designed for applications where maximum rotational speed and absolute minimum frictional resistance are required. Featuring a classic open architecture, this thin-wall bearing provides direct access to the rolling elements, making it ideal for machinery equipped with continuous oil circulation or oil bath lubrication systems. With its highly compact 20mm bore, 27mm outer diameter, and 4mm width, the 6704 serves as a foundational component for internal, highly protected mechanical assemblies where space is at a premium.