Coarse Crushers

The Stag jaw crusher shown inward Figure below, has a fixed jaw in addition to a moving jaw pivoted atthe transcend amongst the crushing faces formed of manganese steel. Since the maximum movement of the jaw is at the bottom, in that place is niggling vogue for the machine to clog, though roughly uncrushed cloth may autumn through in addition to accept to survive returned to the crusher. The maximum pressure level is exerted on the large cloth which is introduced at the top. The machine is normally protected so that it is non damaged if lumps of metallic inadvertently enter, past times making i of the toggle plates inward the driving machinery relatively weak so that, if whatever large stresses are laid up, this is the showtime utilisation to fail. Easy renewal of the damaged utilisation is in addition to so possible.

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Typical cross-section of Stag jaw crusher

Stag crushers are made amongst jaw widths varying from virtually 150 mm to 1.0 thousand in addition to the running speed is virtually iv Hz (240 rpm) amongst the smaller machines running at the higher speeds. The speed of performance should non survive so high that a large quantity of fines is produced equally a upshot of cloth beingness repeatedly crushed because it cannot escape sufficiently quickly. The angle of nip, the angle betwixt the jaws, is normally virtually 30◦.

Because the crushing activity is intermittent, the loading on the machine is uneven in addition to the crusher thus incorporates a heavy flywheel. The ability requirements of the crusher depend upon size in addition to capacity in addition to vary from seven to virtually lxx kW, the latter figure corresponding to a feed charge per unit of measurement of 10 kg/s.

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