Dec 16, 2015 Metallurgical Content Crusher Selection Crusher Design Crusher InstallationCrusher CostsThe Crusher’s Rock BreakersArea of Application Here is a list of Rules of Thumb often used in Rock Crushing and around Crushers Crusher Selection For a hard rock mine application below 600 tonnes hour, select a jaw as the primary crusher. Over 1,000 tph, select a gyratory crusher. Between.Increasing the stroke, the power and the retaining force while improving crusher body design and weight to withstand the force are principles of kinematics. A higher density in the crushing chamber improves the inter-particle crushing action, resulting in superior product shape, high reduction.