A roller table is described having a frame with a longitudinal wall on which a number of bearing casings are rigidly mounted. Each bearing casing has a pair of parallel lugs projecting at right angles to the bearing axis and each formed with an aperture. The lugs straddle the top edge of the longitudinal wall which is also formed with an aperture and a pair of wedges extend through the apertures in the lugs and in the longitudinal wall. A tension bolt is provided for tightening the wedges and a strong compression spring is interposed between a nut on the bolt and the wedges to maintain tightness of the wedges even after wear of the contacting surfaces of the wedges, the wall and the lugs. The spring is arranged to be compressed by a hydraulic thrust device temporarily attached to a free end of the bolt. The nut is then tightened and the hydraulic device removed.
