Tapered drill rod is a further development of the integral drill rods. It usually has a forged collar to maintain the proper shank striking face position in the rock drill. Tapered drill rods effective lengths are measured from the collar to the bit end,which are usually from 0.6 meters to 3.6 meters.

Hex tapered hollow drill rods for rock drill for jack hammer rock drill YT24,YT27,YT28,YT29A,S82 etc

Effective lengths: 400mm ~ 8000mm;
Taper degrees: 4°46’, 6°, 7°, 11°, 12°;
Shank sizes: Hex.19mm,Hex. 22mm, Hex.25mm;
Other lengths are available upon request.

1. The ordinary connection taper degree is 7º, 11º and 12º, other degrees like 4.8º, 6º and 9º are also available upon request;

2. The ordinary shank is Hex22 × 108mm, Hex25 × 159mm and other styles are also available if upon customers’ request;

3. The rod length must be specified in order;

4. In order to adapt to different rock conditions, the drill rod is selected by users.

8. With highly and strength of resistance on the bending, welding fixed.

9. Highly efficiency on production and steady quality.

10 It’s able to keep the hole straight and with long use time.

Water Well Drill Pipe Specifications