Mantle

Details Mantle Mantle

B - Operations, Transporting

02

C

241/34

B02C 2/00 (2006.01)

Patent

CA 1135231

ABSTRACT The crusher comprises a crusher head mounted about a gyratory shaft assembly. The head comprises a mantle mounted on and secured to the shaft by a hold down cap assembly. For this purpose, the shaft is formed with a screw threaded recess, and the cap assembly comprises a screw threaded bushing secured in the recess by external threads on the bushing, which is also provided with internal threads to receive a screw threaded shank of the hold down cap assembly. The bushing is arranged preferentially to fail if the mantle is submitted to undue stress and, for this purpose, the internal threads are made less mechanically strong than the external threads so that failure preferentially takes place at the internal threads. Thus, on failure of the connec- tion between the mantle and the shaft, damage to either of the latter is avoided.

381740

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