SIZE REDUCTION SIZE REDUCTIONRittinger s law – most accurate for fine grinding where the increase in surface per unit mass of . LAW. FKKKSA. Example. A certain crusher accepts a feed rock having a volume-surface mean .. FKKKSA. CRUSHER. Blake jaw crusher.laws of blake jaw crusher,Rock Crushing Rule of Thumb - 911 MetallurgistDec 16, 2015 . s.911metallurgist/blog/blake-type-jaw-crusher. The addition of . Rules of Thumb in Engineering Practice. Donald R.Woods.