ic ▁tile ▁or ▁stone ▁are ▁made ▁from ▁a ▁solid ▁disc ▁with ▁an ▁edge ▁co ated ▁with ▁a ▁diam ond ▁g rit . ▁The ▁most ▁common ▁size ▁for ▁these ▁cutting ▁whe els ▁is ▁▁▁ 4 - 1 / 2 ▁inches ▁in ▁diameter , ▁however ▁they ▁c n ▁range ▁from ▁ 2 ▁to ▁ 1 6 ▁inches ▁in ▁diameter ▁with ▁a ▁thick ness ▁range ▁from ▁. 0 4 5 ▁in ▁to ▁. 1 2 5 ▁in . ▁Type ▁ 1 ▁disc s ▁are ▁flat , ▁and ▁type ▁ 2 7 ▁disc s ▁have ▁a ▁raised ▁hub . ▁These ▁whe els ▁are ▁strong , ▁but ▁not ▁imm une ▁to ▁breaking , ▁if ▁a ▁cutting ▁wheel ▁breaks ▁while ▁in ▁use , ▁fragments ▁could ▁inj ure ▁the ▁operator ▁or ▁a ▁near ▁by ▁co - work ers . ▁To ▁avoid ▁breaking ▁cutting ▁disc s , ▁never ▁exceed ▁the ▁maximum ▁speed ▁( R PM ) ▁specified ▁on ▁the ▁disc , ▁and ▁do ▁not ▁over load ▁the ▁disc ▁by ▁cutting ▁with ▁excess ▁force ▁or ▁jam ming ▁the ▁wheel ▁into ▁your ▁work pie ce . ▁ ▁App lications ▁ ▁Many ▁manual ▁cutting ▁tasks ▁require ▁a ▁hand - h eld ▁gr inder ▁using ▁a ▁cutting ▁wheel . ▁Metal ▁fabric ation ▁is ▁one ▁of ▁the ▁most ▁common ▁uses ▁for ▁cutting ▁whe els . ▁U sed ▁to ▁cut ▁sheet ▁metal , ▁s izing ▁metal ▁stock ▁for ▁w eld ing , ▁cut ▁a ▁w eld ▁to ▁re - w eld ▁it , ▁and ▁cutting ▁and ▁not ch ing ▁steel ▁pipe ▁are ▁just ▁few ▁examples . ▁Die