Teeth Roller Coal Crusher,Double Tooth Roll Crusher,Four, ... Roll Crushers, roller bearings are used to support the rolls The spherical roller b e a r i n g s a r e c o m p l e t e w i t h l a b y r i n t h s e a l s a n d p a c k i n g s f o r p r e v e n t i n g entrance of dust and leakage of oil (4) Drive The standard Double roll crusher ...