Granite is taken from quarry using a variety of tools and personnel. Often these blocks are as large as 10 feet long, 5 feet wide, 2-4 feet high and can weigh over 15 tons.
Granite is cut from the "bed" of the quarry with a jet piercing machine that produces a flame burning at approximately 3,000 degrees Fahrenheit. This high-velocity flame, created by burning oxygen and fuel oil, is directed at the granite to be removed, causing a continuous flaking action. As the flame nozzle is moved up and down, a channel is created around large sections in the quarry.
In some quarries, diamond wire saws are used. A long loop of small steel cable, impregnated with industrial diamond segments, cuts the sections free from the bed of the quarry. After a section has been completely wire sawed or channeled by the burner, it is separated from the bottom by explosives
Likewise, when high-speed drills are used, rows of drilled holes are loaded with explosives. The explosives are detonated to free the sections of granite on all sides and on the bottom.
The large sections are then broken into workable sizes by wedging. In this process, steel wedges are driven manually into holes previously drilled along the desired line of cleavage. The sections are readily forced apart and cross-wedged into rectangular blocks. Large cranes, or derricks, lift these blocks to the quarry's rim. Requirements for monumental granite are exacting, and only about 50 percent of the granite removed from the quarries finds its way into finished monuments.
Blocks are delivered to our plant at McCannon Granite Company where large diamond saws, some with blades up to 11 feet in diameter, cut through the rough block of granite.
At McCannon Granite Company we begin the finishing of your monument
Once the blocks are delivered they are sawed into slabs, smaller saws may be used to further define their size and shape. Often slabs measuring eight to ten feet in length and six to eight inches in thickness are fed into "guillotines" that effortlessly breaks the granite slabs into sizes needed for monuments and markers.
Diamond wire saws offer flexibility in shaping the granite and are sometimes used to cut the slabs into unusual shapes.
Large polishing mills use a variety of grinding and buffing pads and abrasives that are applied systematically to create a mirror-like finish.
Sandblasters and other stone crafters use hammers, razor-sharp carbide tipped chisels, pneumatic tools, and sandblasting equipment to further carve, shape and define each individual monument.
Now that the granite is finished it is loaded on our trucks and delivered straight to your door, with the fasted service and the best prices that can be offered.