18 Inch Four-Point Contact 450x641x55mm Ball Slewing Ring Bearing - inside Gear Inner Diameter - 360mm Dimensions: 6 1/2" x 8"

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18 Inch Four-Point Contact 450x641x55mm Ball Slewing Ring Bearing - inside Gear Inner Diameter - 360mm Dimensions: 6 1/2" x 8"18 Inch Four Point Contact 450x641x55 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