Forged Raise Boring Drill Pipes / Drill Rods
These premium raise boring drill pipes are heavy-duty forged core components engineered for raise boring drilling rigs, produced by Timothy Forging Industry. The golden surface finish is an anti-corrosion passivation treatment for long-term storage and harsh on-site protection.
Structural & Design Features
Hollow integral one-piece forged body with uniform wall thickness
High-precision CNC machined threaded tool joints at both ends, ensuring fast assembly, reliable locking and efficient torque transmission
Strictly controlled straightness and concentricity to reduce drilling vibration and ensure stable bore alignment
Reinforced bearing shoulders to withstand extreme make-up torque and heavy downhole loads
Forging & Material Superiority
Manufactured from premium quenched & tempered alloy steels (common grades: 42CrMo4, 34CrNiMo6, AISI 4140/4340)
Open-die forging creates continuous, directional metal grain flow aligned with actual working stress paths
Zero internal defects (porosity, inclusions) vs standard seamless pipe machined rods
Delivers far higher torsional strength, bending resistance and multi-cycle fatigue life under hard rock, high-impact underground conditions
