During the first half of the nineteenth century, mechanical crushing was not cheaply available. Stone had been crushed for applications such as Macadam road metal exclusively by hand, using the cheapest available labour, such as convicts and workhouse inmates.
NEW AND USED IMPACT CRUSHERS FOR SALE. Surplus new and used impact crushers sold in Canada, USA, UK, Australia, Asia, Europe. Stedman disintegrator, Jacobson hammermill, Jeffrey mini-mill, Pennsylvania impact crusher, Hazemag impact crusher, Nordberg impact crusher, Remco VSI, Raymond impact mill.
PRIMARY CRUSHING: MOBILE JAW CRUSHERS. Jaw crushers operate according to the principle of pressure crushing. The raw feed is crushed in the wedge-shaped pit created between the fixed crusher jaw, and the crusher jaw articulated on an eccentric shaft.