▁Category : American ▁folk ▁sing ers ▁Category : L iving ▁people ▁Category : Pe ople ▁from ▁B elling ham , ▁Washington ▁Category : Mus icians ▁from ▁Austin , ▁Texas ▁Category : K ick st arter - fund ed ▁albums <0x0A> </s> ▁Center less ▁gr inding ▁is ▁a ▁mach ining ▁process ▁that ▁uses ▁ab ras ive ▁cutting ▁to ▁remove ▁material ▁from ▁a ▁work pie ce . ▁Center less ▁gr inding ▁diff ers ▁from ▁centered ▁gr inding ▁operations ▁in ▁that ▁no ▁sp ind le ▁or ▁fi xture ▁is ▁used ▁to ▁locate ▁and ▁secure ▁the ▁work pie ce ; ▁the ▁work pie ce ▁is ▁secured ▁between ▁two ▁rot ary ▁gr inding ▁whe els , ▁and ▁the ▁speed ▁of ▁their ▁rotation ▁relative ▁to ▁each ▁other ▁determ ines ▁the ▁rate ▁at ▁which ▁material ▁is ▁removed ▁from ▁the ▁work pie ce . ▁ ▁Center less ▁gr inding ▁is ▁typically ▁used ▁in ▁preference ▁to ▁other ▁gr inding ▁processes ▁for ▁operations ▁where ▁many ▁parts ▁must ▁be ▁processed ▁in ▁a ▁short ▁time . ▁ ▁Working ▁principle ▁ ▁In ▁center less ▁gr inding , ▁the ▁work pie ce ▁is ▁held ▁between ▁two ▁whe els , ▁rot ating ▁in ▁the ▁same ▁direction ▁at ▁different ▁spe eds , ▁and ▁a ▁work hold ing ▁platform . ▁One ▁wheel , ▁known ▁as ▁the ▁gr inding ▁wheel ▁( station ary ▁wheel ▁in ▁the ▁diagram ), ▁is ▁on ▁a ▁fixed ▁axis ▁and ▁rot ates ▁such ▁that ▁the ▁force ▁applied ▁to ▁the ▁work pie ce ▁is ▁directed ▁down ward , ▁against ▁the ▁work hold ing ▁platform . ▁This ▁wheel ▁usually