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English Views: 12 Author: Site Editor Publish Time: 2020-03-27 Origin: Site
Tapered drill rod (taper steel rod, taper drill steel), which provides a hexagonal chuck section to provide leverage for the rotation chuck bushing. It usually has a forged collar to maintain
the proper shank striking face position in the rock drill, and a tapered bit end.
For drilling medium-hard to hard and abrasive rock formations, 11 and 12 taper degree rod are widely used on heavy-duty modern hydraulic drill rigs. While, 6 and 7 taper degree rod are applied for light-duty rock drill, such as the hand held pneumatic rock drill Y18, Y20, Y24, Y26, YT24 and YT28.
Specifications of tapered drill rod:
| Model | Taper Degree | Drilling Rod Length | Shank Size |
| Hex.19mm | 4.46, 6, 7, 11 and 12 | 0.4m-4.0m | 83mm,108mm |
| Hex.22mm | 4.46, 6, 7, 11 and 12 | 0.4m-4.8m | 108mm |
| Hex.25mm | 4.46, 6, 7, 11 and 12 | 0.8m-4.8m | 108mm,159mm |
