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Metric Series Parallel Threaded Drill Rod

Drill rods for conventional rotary drilling in metric measurements are manufactured in diameters 33, 42, 50 and 60 mm. All rods are manufactured from high quality heat-treated cold-drawn material. They have a high wear resistance  and excellent finish.

The rods are manufactured from smooth parallel wall tube, with separate couplings. The couplings are manufactured from alloy steels of high strength and toughness. Standard lengths are 3.0m, 1.5m and 0.5m.

CR42 and CR50 are also available in aluminium.

Technical Data

Specification Rod Type (Steel)
CR33 CR42 CR50 CR60
Outside Diameter (mm) 33.5 42.0 50.0 60.0
Inside Diameter (mm) 23.7 32.2 37.0 48.0
Coupling I.D. (mm) 15.0 23.0 23.0 25.0
Threads per inch 4 4 3 4


Specification Rod Type (Aluminium)
CR42 CR50
Outside Diameter (mm) 43.2 53.3
Inside Diameter (mm) 30.8 37.5
Coupling I.D. (mm) 22.0 22.0
Threads per inch 4 3