Available in all standard drilling sizes: BTW, NTW, HTW.
Heat treated and quenching treatment of drill rods.
High straightness and long service time.
Hardrock thin wall drill rods are made to meet the standard of DCDMA, they are widely used in the wireline core drilling. 1, Size: BTW/NTW/HTW 2, Outside Diameter: BTW-56.3mm/NTW-73.3mm/HTW-91.3mm 3, Inside Diameter: BTW-48mm/NTW-64mm/HTW-81mm 4, Rod Material: 30CrMnSiA/XJY850 5, Service Life: 5000m 6, Length per Piece: 3m/1.5m