Mining PDC drill bits

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2021年04月01日

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What is the drill rods connect thread standard?


Roschen supply kinds of mining PDC drill bits and rock drilling tools. We also provide types of drill rods, such as nq drill rod, hollow drill rod and taper drill pipes. This article we talk about thread standard of the drill pipe and drill bits.



IF and FH drill thread.jpg 2 3/8" REG.jpg



API standard connect thread specification




API standard connect thread specification

API threadPin end Box end 
diameter/mmdiameter/mm
NC26=2 3/8"IF60.3574.61
NC31= 2 7/8"IF71.3187.71
NC38=3 1/2"IF85.06103.58
NC40=4"FH89.06110.33
NC4498.42119.06
NC46=4"IF103.73124.61
NC50=4 1/2"IF114.3134.91
2 3/8"REG47.6268.2
2 7/8"REG53.9777.78
3 1/2"REG65.0790.48

IF=internal flush

FH=full hole

REG=regular




Roschen manufacture kinds of mining PDC drill bits, When you send inquiry to us, please tell us the PDC drilling bit diameter and connect thread, application, etc. More information is good for us to provide an exact price. Welcome to send inquiry to us.




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