a device for supporting separate parts of a flanged plain bearing so that they can be welded together . the device comprises a main body part having an arcuate seating across its upper surface and a planar side surface adjoining such seating . there are provided means to clamp an arcuate shell in the seating and means to clamp a separate flange against the side surface with the edges of shell and the flange , to be joined together , in abutment and exposed for welding . the latter clamping means includes a clamping element movable to a position in which it engages the face of the flange remote from the side surface to hold it firmly against such surface .