Hole-openers manufactured by Universal Drilling Technique LLC

Type Diameter, mm Designed for drilling formations Design features Connecting thread according to State Standard 21210-75 Maximum drilling thrust, kH. Maximum weight, kg Maximum length, mm
5РШ 393,7 МС 393,7 soft formations with medium streaks hole-opener+ 2 spare crowns МЗ-171 х НЗ-147 250 220+103+103 830
5РШ 393,7 СЗ 393,7 medium hard abrasive hole-opener+ 2 spare crowns МЗ-171 х НЗ-147 250 220+103+103 830
5РШ 393,7 Т 393,7 hard low-abrasive hole-opener+ 2 spare crowns МЗ-171 х НЗ-147 250 220+103+103 830