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