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hale hana API o Roller cone bit IADC637 3 7/8″ (98mm) ma ka waihona
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Mea hoʻolako i nā ʻāpana pihi IADC637 7 7/8 ” (200mm)
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API tricone rock bits IADC637 9 5/8 ” (244.5mm) ma ka waihona
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TCI tricone bit IADC617 6 1/2″ (165mm) no ka wili wili.
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Mea hoʻolako API o nā ʻāpana wili lua pōhaku hohonu IADC537 9 5/8″(244.5mm)
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API TCI pihi bit IADC537 9 7/8″(250mm) no ka luawai pōhaku paakiki
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Bit pihi Rotary IADC537 3 7/8″ (98mm)
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Nā Bits Tricone IADC537 4 5/8″ (118mm)
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ʻO nā ʻāpana drill Tricone IADC537 4 3/4″ (120.6mm)
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API tricone rock bit IADC537 5 1/4″ (133mm)
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API pōhaku drill bit IADC537 5 1/2 ” (139.7 mm) no ka luawai paakiki
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ʻO nā bit drill API IADC537 5 5/8″ (142.9mm)