▁people ▁Category : S ports people ▁from ▁Paris ▁Category : T our ▁de ▁France ▁cycl ists ▁Category : V uel ta ▁a ▁España ▁cycl ists ▁Category : G iro ▁d ' Italia ▁cycl ists <0x0A> </s> ▁Dr illing ▁is ▁a ▁cutting ▁process ▁that ▁uses ▁a ▁dr ill ▁bit ▁to ▁cut ▁a ▁hole ▁of ▁circular ▁cross - section ▁in ▁solid ▁materials . ▁The ▁dr ill ▁bit ▁is ▁usually ▁a ▁rot ary ▁cutting ▁tool , ▁often ▁multi - point . ▁The ▁bit ▁is ▁pressed ▁against ▁the ▁work - pie ce ▁and ▁rot ated ▁at ▁rates ▁from ▁hundreds ▁to ▁thousands ▁of ▁revolution s ▁per ▁minute . ▁This ▁forces ▁the ▁cutting ▁edge ▁against ▁the ▁work - pie ce , ▁cutting ▁off ▁ch ips ▁( sw arf ) ▁from ▁the ▁hole ▁as ▁it ▁is ▁d ril led . ▁ ▁In ▁rock ▁dr illing , ▁the ▁hole ▁is ▁usually ▁not ▁made ▁through ▁a ▁circular ▁cutting ▁motion , ▁though ▁the ▁bit ▁is ▁usually ▁rot ated . ▁Instead , ▁the ▁hole ▁is ▁usually ▁made ▁by ▁ham mer ing ▁a ▁dr ill ▁bit ▁into ▁the ▁hole ▁with ▁quickly ▁repeated ▁short ▁movements . ▁The ▁ham mer ing ▁action ▁can ▁be ▁performed ▁from ▁outside ▁the ▁hole ▁( top - ham mer ▁dr ill ) ▁or ▁within ▁the ▁hole ▁( down - the - hole ▁dr ill , ▁D TH ). ▁Dr ills ▁used ▁for ▁horizontal ▁dr illing ▁are ▁called ▁dr if ter ▁dr ills . ▁ ▁In ▁rare ▁cases , ▁spe cially - sh aped ▁bits ▁are ▁used ▁to ▁cut ▁holes ▁of ▁non -