Rock drill model: Pneumatic drill
Test place: Ecuador—El Oro, Azuay, Zamora
Test model: Taper bit, 11 degrees, 38 mm, 5*9 mm, 2*7 mm, short skirt.
Hole depth: 1.2 m. Test result: The golden taper bit drills 175 holes, the yellow taper bit with 1 front hole and 1 side hole drills 160 holes, and the yellow taper bit with 2 front holes and 1 side hole drills 160 holes.
The taper bit after using.
The golden taper bit with 1 front hole and 1 side hole drills 175 holes with 1.2 m depth per hole.
The yellow taper bit with 2 front holes and 1 side hole drills 170 holes with 1.2 m depth per hole.
The yellow taper bit with 1 front hole and 1 side hole drills 160 holes with 1.2 m depth per hole.
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