▁one ▁brand ▁of ▁dress ing ▁stick ▁made ▁by ▁N orton ▁A bras ives ▁from ▁bor on ▁nit ride . ▁ ▁Also ▁an ▁ab ras ive ▁wheel ▁type ▁that ▁has ▁a ▁small ▁" gr inding ▁wheel " ▁in ▁a ▁holder ▁that ▁is ▁held ▁against ▁the ▁spin ning ▁gr inding ▁wheel ▁to ▁dress ▁and ▁clean ▁the ▁face ▁of ▁the ▁gr inding ▁wheel . ▁ ▁Gr inding ▁complex ▁shapes ▁Four ▁types ▁of ▁dress ers ▁are ▁used ▁to ▁dress ▁the ▁whe els ▁of ▁C NC ▁gr ind ers ▁used ▁for ▁gr inding ▁complex ▁shapes . ▁This ▁type ▁of ▁dress er ▁is ▁mainly ▁in ▁use ▁on ▁C NC ▁gr inding ▁machine ▁tools ▁to ▁automatically ▁dress ▁the ▁gr inding ▁wheel ▁via ▁computer ▁control ▁in ▁special ist ▁areas ▁requiring ▁complex ▁shapes ▁such ▁as ▁gr inding ▁bearing ▁race ways . ▁Station ary ▁dress ers ▁— ▁a ▁station ary ▁dress er ▁is ▁a ▁metal ▁bla de ▁with ▁a ▁single ▁diam ond ▁bra zed ▁into ▁the ▁tip . ▁A ▁C NC ▁dress ing ▁program ▁moves ▁it ▁across ▁the ▁face ▁of ▁the ▁wheel , ▁moving ▁in ▁and ▁out ▁to ▁create ▁the ▁desired ▁profile . The ▁gr inding ▁wheel ' s ▁profile ▁is ▁controlled ▁by ▁the ▁C NC ▁program ▁used ▁to ▁dress ▁the ▁wheel , ▁rather ▁than ▁by ▁the ▁profile ▁of ▁the ▁dress er ▁itself . ▁Cr ush ▁roll s ▁— ▁a ▁cr ush ▁roll ▁is ▁a ▁high - speed ▁steel ▁or ▁t ung sten ▁car b ide ▁wheel . ▁Its ▁profile ▁is ▁the ▁mirror ▁image ▁of ▁the ▁desired ▁profile ▁of ▁the ▁gr inding ▁wheel