21 Inch Four-Point Contact 528x774.4x80mm Ball Slewing Ring Bearing - Outside Gear Inner Diameter - 340mm 71905 Full Ceramic Angular Contact

71905 Full Ceramic Angular Contact Ball Bearing

Flanged Deep groove ball bearings

Bearing inner diameter is 28mm

UCT205-16 FYH Bearing

21 Inch Four-Point Contact 528x774.4x80mm Ball Slewing Ring Bearing - Outside Gear Inner Diameter - 340mm 71905 Full Ceramic Angular Contact21 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.)