Drill bits of BC type

	Drill bits of BS type, impregnated with hard-alloyed cutters, are purposed for drilling in low abrasive soft and medium rock formations, to drill out cement and sand plugs.
	Dimension acc. to new nomenclature Outside diameter, mm Coupling thread Dimension acc. to old nomenclature GOST 28487-90 API 7 BC 45...57 45…57 Cylindrical 33 (GOST20692-75) — DT-45 ÌÑ…DT-57 ÌÑ BC 70…89 70…89 Ç-50 (GOST7918-75) — DT-70 ÌÑ…ÄÒ-89 ÌÑ BC 93…97 93…97 Ç-66 23/8 Reg DT-93 ÌÑ…DT-97 ÌÑ BC 120,6…139,7 120,6…139,7 Ç-76 27/8 Reg DT-120,6 ÌÑ…DT-139,7 ÌÑ

• BC-93