38 Inch Four-Point Contact 960x1232x79mm Ball Slewing Ring Bearing - inside Gear Inner Diameter - 4 1/4 inch (4.25") This heavy duty four-bolt flange

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38 Inch Four-Point Contact 960x1232x79mm Ball Slewing Ring Bearing - inside Gear Inner Diameter - 4 1/4 inch (4.25") This heavy duty four-bolt flange38 Inch Four Point Contact 960x1232x79 mm Ball Slewing Ring Bearing with inside Gear Four Point Contact Ball Slewing Bearing with inside 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.) Item