. ▁ ▁O thers ▁ ▁Some ▁materials ▁like ▁pl ast ics ▁as ▁well ▁as ▁other ▁non - met als ▁and ▁some ▁met als ▁have ▁a ▁t endency ▁to ▁heat ▁up ▁enough ▁to ▁expand ▁making ▁the ▁hole ▁smaller ▁than ▁desired . ▁ ▁Rel ated ▁processes ▁ ▁The ▁following ▁are ▁some ▁related ▁processes ▁that ▁often ▁accomp any ▁dr illing : ▁ ▁C ounter bor ing ▁ ▁This ▁process ▁creates ▁a ▁stepped ▁hole ▁in ▁which ▁a ▁larger ▁diameter ▁follows ▁a ▁smaller ▁diameter ▁partially ▁into ▁a ▁hole . ▁Coun ters inking ▁ ▁This ▁process ▁is ▁similar ▁to ▁counter bor ing ▁but ▁the ▁step ▁in ▁the ▁hole ▁is ▁cone - sh aped . ▁Bor ing ▁ ▁Bor ing ▁precisely ▁en larg es ▁an ▁already ▁existing ▁hole ▁using ▁a ▁single ▁point ▁cut ter . ▁Fr iction ▁dr illing ▁ ▁dr illing ▁holes ▁using ▁pl astic ▁de formation ▁of ▁the ▁subject ▁( under ▁heat ▁and ▁pressure ) ▁instead ▁of ▁cutting ▁it . ▁Re aming ▁ ▁Re aming ▁is ▁designed ▁to ▁en large ▁the ▁size ▁of ▁a ▁hole ▁to ▁leave ▁smooth ▁sides . ▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁ ▁▁▁▁▁▁▁ ▁; Sp ot ▁facing ▁: This ▁is ▁similar ▁to ▁mill ing , ▁it ▁is ▁used ▁to ▁provide ▁a ▁flat ▁machine ▁ ▁surface ▁on ▁the ▁work pie ce ▁in ▁a ▁local ized ▁area ▁ ▁See ▁also ▁ ▁Las er ▁dr illing ▁Dr illing ▁rig ▁ ▁References ▁ ▁External ▁links ▁▁ ▁Category : M ach ining ▁Category : W ood working <0x0A> </s> ▁" Please ▁Me " ▁is ▁a ▁song ▁by ▁American ▁ra pper ▁Card i ▁B ▁and