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| Place of Origin | Germany |
| Brand Name | ROSCHEN |
| Certification | ISO |
| Model Number | 2-3/8" 2-7/8" 2-7/8" 2-7/8" 2-7/8" 3-1/2" 3-1/2" 3-1/2" 4-1/2" 4-1/2" 4-1/2" 4-1/2" 4-1/2" 4-1/2" 4-1/2" |
2 - 7/8" Drill Rod
Introduction
Tapered drill rods is mainly used in the drilling blasting hole, guardrail hole, mountain reinforcment, anchoring and other engineering holes in mines, quarris, high ways, railways and so on.It has a long service life.and the y’re also subjected to high bending stress,transferring the percussion energy from rock drill to drilling bit and then into the rock.
Parameters
| Mayhew Junior rods pin to box Friction Welded | |||
| O.D. | Wall Thickness | Length | Thread |
| 2-3/8" | .254" | 20" | 2-38" IF |
| 2-7/8" | .308" | 5" | 2-3/8" MAYHEW JR. |
| 2-7/8" | .362" | 5" | 2-3/8" MAYHEW JR. |
| 2-7/8" | .308" | 10" | 2-3/8" MAYHEW JR. |
| 2-7/8" | .362" | 10" | 2-3/8" MAYHEW JR. |
| 3-1/2" | .250" | 20" | 2-3/8" IF |
| 3-1/2" | .368" | 20" | 2-3/8" IF |
| 3-1/2" | .368" | 20" | 2-3/8" IF |
| 4-1/2" | .337" | 5" | 3-1/2" API |
| 4-1/2" | .337" | 10" | 3-1/2" API |
| 4-1/2" | .337" | 20" | 2-7/8" IF |
| 4-1/2" | .337" | 20" | 2-7/8" IF |
| 4-1/2" | .337" | 20" | 2-7/8" IF |
| 4-1/2" | .337" | 20" | 3-1/2" API |
| 4-1/2" | .337" | 20" | 3-1/2" API |
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