(57) The invention solves the problem of a simple unit for determination of overturning
moment of a heavy working machine, especially a crane, by utilization of elastic strain
of separable connections. The unit has an indicator (1) connected with a measuring instrument serving for determination
of a total force R. The indicator (1) is situated perpendicularly to the rotation
plane of the crane and lies in the vertical plane of symmetry of the jib and is set
at a constant distance of about from the axis of rotation of the crane, that is, in
the vicinity of rolling elements of the bearing (2).
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