21 Inch Four-Point Contact 528x774.4x80mm Ball Slewing Ring Bearing - Outside Gear Inner Diameter - 340mm 2 3/4" Mounted Bearing UCFL-214-44

2 3/4" Mounted Bearing UCFL-214-44

81111M Cylindrical Roller Bearing

Bearing No: FHS204-12G

🟢 Inner diameter: 20mm

Bearing inner diameter is 28mm

21 Inch Four-Point Contact 528x774.4x80mm Ball Slewing Ring Bearing - Outside Gear Inner Diameter - 340mm 2 3/4" Mounted Bearing UCFL-214-4421 Inch Four Point Contact 528x774. 4x80 mm Ball Slewing Ring Bearing with Outside Gear Four Point Contact Ball Slewing Bearing with Outside Gear A slewing bearing ring is a rotational rolling element bearing that typically supports a heavy but slow turning or slow oscillating load, often a horizontal platform such as a conventional crane, or the wind facing platform of a horizontal axis windmill. (To 'slew' means to turn without change of place.)