A crusher is a machine designed to reduce large rocks into smaller rocks, gravel, or rock dust. .. At the time, mines and foundries were virtually all small enterprises except for the tin mines (driven by the price and utility of brass) and materials .. Blake crushers are of two types- single toggle and double toggle jaw crushers.
Oct 18, 2016 . Others include: Superior, Type “B” Blake, Fine-Reduction and Dodge . You lower maintenance cost, get longer jaw plate, toggle and bearing.