oct 05, 2021 therefore, the crusher reduction ratio is 2. calculating the gape size when the crusher reduction ratio and the set size is given. g r r x s. where g gape size. r r crusher reduction ratio. s set size. lets solve an example find the gape size when the crusher reduction ratio is 8 and the set size is 4.,crusherssize reduction crusher mills cone crusher,reduction ratio main use jaw crushers soft to very hard no limit dry to slightly wet, not sticky size reduction equipment wet sticky clay quarrying crusher quarrying crushers are mainly used to make building stone materials and manufacturered sand.