Tightening arm for use in testing machine for testing bending fatigue of workpiece i.e. crankshaft, has connection element comprising external surface, where internal surface and external surface are widened according to slope

摘要

The arm (6) has a tubular body (9) placing a connection element (10), where the tubular body comprises an internal surface (24). The connection element comprises an external surface. The internal surface and the external surface are widened according to a slope (P). A screw (25) is engaged with a distal opening (20) that includes the connection element. The connection element includes a proximal opening (19) that is formed in a housing for receiving an end piece (8) of a workpiece (2). The proximal and distal openings are aligned with a proximal port (14) and another distal opening (15). An independent claim is also included for a method for assembling a tightening arm.