7 taper degree H22*108 rock drill rod
Shank Hex:19mm*83/108mm, 22m*83/108mm, 25mm*108/159mm
Taper degree:4.46 6 7 11 12
Drilling rod length:0.4m-6m
The tapered drill rod is used for rock drilling, blasting holes and other drilling works in the quarries, coal mines, traffic and other constructions.
Generally, the light rock drill uses 7 taper or smaller taper angle, the heavy rock drill mainly uses 12 taper angle.
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