Tapered Drill Rod H19, H22, H25

 Commodity:    Tapered Drill Rods
Degree:             7°,  11°,  12°
Shank of bit:   H19*82mm,  H22*108mm,  H25*159mm
Lengthes:        500mm - 10000mm

We can also supply the drill rods according to the customer's detailed requirements.
 
Intruction:
We mainly produce hollow steel and hollow drill rods, hollow steel mainly adopts large-cross-section rolled square billets and 150*150 continuous casting billets, namely drilling and cored rolling process. The products are always in a controlled condition during production with stable quality.
The yearly output of hollow steel is 30000 tons to 50000 tons, which are widely used to mining, the engineering construction of highways, railways and tunnels, the engineering construction of national large-sized hydropower stations and nuclear power stations, etc.
Product recommended intruction for use.