The F681 is a metric, flanged, deep-groove ball bearing with a 1.5mm bore, 4mm outer diameter, and 1.2mm width . This ultra-compact bearing supports moderate radial loads (dynamic load rating up to 112 N) and is suited for very high-speed operation (up to 100,000 rpm with grease lubrication) . The integral flange simplifies mounting and positioning in compact machinery and precision instruments .
