FYH 4 Bolt Flange Mounted Ball Bearing NCF21239E, 2-7/16" Bore Dia., Concentric Collar
Concentric locking collar bearings utilize a special shaft locking mechanism that provides for 360 degrees of shaft contact and a high degree of ballpath roundness. This translates to low vibration and quiet operation. They are ideal for air handling applications and other areas with high speed operation. Re-greasable.