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HJ/HJT Series Rock bits
METAL SEALED Rock BIT WITH JOURNAL BEARING
HJ/HJT series Rock bit adopts metal seal with journal bearing, which can drill stably with high rotary speed.
The size range of HJ/HJT series bit is from 7 1/2 to 18 7/8 inch, and IADC varies from 117 to 547.For example:8
HJ/HJT TCI tricone bit
METAL SEALED tricone BIT WITH JOURNAL BEARING
HJ/HJT series tricone bit adopts metal seal with journal bearing, which can drill stably with high rotary speed.
The size range of HJ/HJT series tricone bit is from 7 1/2 to 18 7/8 inch, and IADC varies from 117 to 547.For