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Show ROCK CRUSHER. It It the Largett Machine of Itt Kind In the World. Tho largest rock crusher In tho world Is at South Pittsburg, Tenn., where it prcpnrcB all tho rock used Itt Weight It 425,000 Poundt. In a cement plant which turns out 4,000 barrels of comont per day. It crushes an exceedingly hard nnd tough llmcstono to a six-Inch slzo anfl smaller at tho rato of 00 tons per hour. Nearly CO per cent, of this Is under four Inches In size, and 30 per cent under two Inches. Tho crusher Is 16 feet 11 Inches high and Its hopper bus n dlnmcter of 20. feet. Its weight is 425,000 pounds. Tho top shell of tho mnchlno Is mado In two pieces connected by 14-Inch bolts. Each half with Its conenvo weighs 73,000 pounds. Tho main shaft wclghB 33,000 poiinds and is 30 Inches In dlnmetcr, Tho crushing head Is soven feet high and C5 Inches In diameter, weighing 32,000 pounds, The design of tho crushor was based, on an assumption of a crushing prcssuro near tho bottom of tho head of 1,600,-000 1,600,-000 pounds. |