The F691X is a metric, flanged, deep-groove ball bearing with a 1.5mm bore, 5mm outer diameter, and 2mm width (2.6mm overall with flange) . This ultra-compact design supports moderate radial loads (dynamic load rating 237 N) and is suited for very high-speed operation up to 85,000 rpm (grease) or 100,000 rpm (oil) . The integral flange simplifies mounting and positioning in compact machinery and precision instruments .
