Ububanzi: φ15-120mm
Isicelo: Isetyenziswa ngokubanzi kwimigodi eyahlukeneyo, kwizityalo zesamente, kwizityalo zamandla kunye namashishini amachiza.
Iibhola ezibunjiweyo zeChromium zisetyenziswa kakhulu ekulungiseleleni umgubo, kunye nomgubo wesamente, intsimbi ekrwada kunye nodaka lwamalahle.Zisetyenziswa kumandla obushushu, ubunjineli beekhemikhali, ipeyinti yeceramic, ishishini lokukhanya, ukwenza iphepha kunye namashishini ombane wemagnethi, ngaphandle kwabanye.Iibhola zokusila ezibunjiweyo zinokuqina okubalaseleyo, zigcina imilo yazo yesangqa, ukuguga okuphantsi kunye nokukrazula, kunye nezinga eliphantsi lokutyumza.Ukuqina kwebhola yethu ephezulu ye-chromium yi-56-62 HRC, ukuqina kwebhola ye-chromium ephakathi ukuya kwi-47-55 HRC, ngelixa ukuqina kwebhola ye-chromium ephantsi ukuya kwi-45-52 HRC, kunye ne-15 mm njengobuncinane. kunye ne-120 mm njengobona bukhulu bedayamitha.Isetyenziswa ngokubanzi kwiindidi zemill eyomileyo.