HEX shank size is 22x108MM, 25x108MM, 25x159MM, 28x159MM, and drill rod end connect bit with thread R22,R25,R32 for small hole drilling.
We manufacture shank end rods in the following threads: R22, R23, R25, R28, R32, mainly focus on the stone quarrying such as granite, marble, limestone, sand stone quarries drilling , diameter of hole range from 38mm-50mm at most.
- Carburization is a process used to harden the entire rod surface both internally and externally to strengthen and extend the life of the rod.
- High Frequency Induction is a process where only the thread ends of the rod are hardened to lengthen thread life.
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