" ÷.75" = to 1 reduction Crushing 101Basic Crusher Guide Crusher Type Maximum Feed Size Product Size Jaw Crusher 80% of opening generally 24" 612" x 0 Gyratory Feed opening reliant upon size of crusher 1012"x 0 Standard Head Cone 14" ¾" to 4" Horizontal Shaft Impactor 40" (primary) 16"(secondary) 6" ¾" to 4"