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Ile-iṣẹ API ti Roller cone bit IAC637 3 7/8″ (98mm) ni iṣura
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Awọn olutaja Bọtini bits IDC637 7 7/8 ”(200mm)
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API tricone rock bits IDC637 9 5/8 "(244.5mm) ninu iṣura
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TCI tricone bit IDC617 6 1/2" (165mm) fun ẹrọ liluho
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Olupese API ti awọn ege lilu kanga apata jinlẹ IDC537 9 5/8″(244.5mm)
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API TCI Bọtini bit IDC537 9 7/8"(250mm) fun liluho kanga apata lile
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Bọtini Rotari Bit IDC537 3 7/8 ″ (98mm)
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Tricone Bits IDC537 4 5/8 ″ (118mm)
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Tricone drill bits IDC537 4 3/4 ″ (120.6mm)
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API tricone apata bit IDC537 5 1/4 ″ (133mm)
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API rock drill bit IDC537 5 1/2 ”(139.7 mm) fun kanga lile
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API drill bits IDC537 5 5/8 ″ (142.9mm)