With the McGARF Grade Line Laser, a miner or a supervisor can mark the grade lines on the side walls.
The McGARF Grade Line Laser will also give you a levelled horizontal line at the same height as the laser dot on the front wall.
How it is used:
Install the the McGARF Alignment Laser into the sleeve and this will send a laser dot, on line and grade, to the front face.
Place the McGARF Grade Line Laser on to the McGARF Alignment Laser, level it using the spirit bubble and lock it in place.
Turn on the grade line laser.
The laser line will either be above or below the dot on the front wall.
Using the adjustment screw, line up the laser line with the dot.
Once this has been done, you now have a level line across the front face and a grade line down both side walls.
Using this equipment, marking the grade lines can now be done by anyone.
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