Borokho ba lefika bo tshwarwang ka letsoho bo ile ba hlahiswa ke Ingersoll-RandCo. ka 1912. Ho ya ka mofuta wa motlakase, bo arotsoe ka mekhahlelo e mene: pneumatic, hydraulic, electric le internal combustion drive. Pneumatics ke tsona tse sebediswang haholo. Borokho ba lefika bo tshwarwang ka letsoho bo loketse ho tjheka di-blasthole tse theohelang kapa tse sekametseng, di-blasthole tse kgolo tse silang tsa bobedi, dikoti tsa bolte (dikoti tse sa tebang tse otlolohileng), le dikoti tse tsitsitseng tsa pulley (dikoti tse sa tebang tse otlolohileng) ka hara oli e boima bo mahareng le e ka hodimo ho e boima bo mahareng. Bophara ba borokho ke 19 ~ 42mm, mme botebo bo boholo ba lesoba ke 5m, ka kakaretso bo ka tlase ho 2.5m. Li-drill tsa majoe tse sebelisoang ka letsoho tse tsamaisoang ka letsoho tse sebelisoang ka pneumatic li na le matla a tšusumetso a 15 ～45J, maqhubu a tšusumetso a 27 ～36Hz, torque ea drill ea 8 ～13N·m, khatello ea ho sebetsa ea 0.5 ～0.7MPa, tšebeliso ea moea ea 1500 ～3900L/min, le boima ba 7 ～30kg.
Nako ea poso: Hlakubele-31-2021
