Crane & Hoist

Flat Top/Luffing Tower Cranes




Series 51 Geared Cam Limit Switches can map a wide range of shaft rotations to the angular displacements of the installed cam discs. These cam discs actuate electro-mechanical switches. They are used where angles or distances cannot be limited directly by switchgear, but only indirectly on the basis of the measured angle of rotation. A classical example of this application involves limiting the hook lift of a crane hoist.

    • Synthetic housing and metal housing 
    • Large cam disc diameter
    • 2 - 8 contacts
    • Installation of incremental- and absolute encoders possible
    • Cam adjustments at fixed position in the housing with a gear ratio of 146
    • Modular design
    • Positive opening according to IEC 60974-5-1 Annex K

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