Drill Rod Extension

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Brief

Drill rod extension used in coal mine exploration, with each section measuring 1.5 meters in length. Featuring a hexagonal connection, it extends the torque transmission distance between the drilling machine and the main drill rod. Suitable for use with pneumatic drilling systems such as the AA-1.

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The drill rod extension is an essential accessory in coal and geological exploration drilling. It serves as a connecting element between the drilling machine and the primary spiral drill rod, ensuring stable and precise torque transmission in deep or hard-to-reach areas.

This product is designed as a smooth rod with a spiral (helical) profile. Each section has a standard length of 1.5 meters and features a hexagonal (hex) connection, providing high stability and secure engagement during operation in challenging mine terrains. It is manufactured from high-strength structural steel, treated for wear resistance and deformation protection under harsh working conditions.

This extension rod is intended for use with spiral drill rods and the AA-1 pneumatic drilling machine, making it ideal for coal seam exploration and geological surveys.

Parameter	Value
Product Type	Spiral Drill Rod Extension
Application	Coal exploration drilling, torque transmission extension
Section Length	1.5 meters
Connection Type	Hexagonal (hex) connection
Rod Diameter (excluding spiral profile)	Φ21 ± 1 mm
Rod Diameter (including spiral profile)	Φ40 ± 1 mm
Material	High-strength alloy steel
Compatibility	AA-1 Pneumatic Drill & Spiral Drill Rod
Color	Green / Black

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