The clamping device has a U-shaped bracket (3) which is used to clamp a guide rod (2) and the axle body (1) between a clamp plate (5) and an axle tab (4). The surface (7) of the guide rod facing the axle tab has a concave recess (8), and a thrust block (9) with convex surface is fitted into the recess. The block has a shoulder (10), which projects into an opening (6) in the axle tab. The recess is formed by a ring groove (8') with concave base. The surface of the thrust block has a fitting ring bulb (11). The block shoulder is fitted into the axle tab opening with radial play.
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