Abstract: The assembly comprises a fixed fork (10) of which the lugs (22, 30) support a rod (60) onto which a spherical ball is slipped (46) about which a cage (44) and a support (42), of the part which is mobile in rotation, swivel. The maintaining of the axial and angular positions of the spherical ball (46) in the fork is ensured, in particular, by a tight fit (A3) which replaces conventional screw and nut systems positioned at the end of the rod and which project disadvantageously. According to the invention, a pair of planar facets which are opposing and in abutment (including 23) carry out a blocking of one of the assembly pieces in rotation. Application to bell cranks for the transmission of movement, in particular in aircraft engines.

Abstract: A bushing for a variable-pitch vane pivot in a turbomachine, the bushing being for mounting in a recess in a ring of the turbomachine, the recess being of a shape that is substantially complementary to the shape of the bushing, the bushing comprising a body that is substantially tubular having a longitudinal axis, and at least three branches extending radially outwards relative to the longitudinal axis of the tubular body, and axially over the full height of said tubular body, said branches being distributed in substantially equidistant manner around the circumference of the tubular body.