Quanzhou Keen Diamond Tool Co., Ltd.

Wire cutting|
Wire cutting has become quite popular in the last 20 years in marble quarries and in the last 10 years in granite quarries. A diamond wire saw can work without operator. The first modern wire saws for granite used to have mechanical speed variators which wore out quickly, however, and were energy consuming (about 30% of the absorbed energy was consumed by the mechanical variator itself). The last generation machines now have inverter motors which change the cutting speed by varying the frequency. In this way all the absorbed energy is directly transmitted to the diamond wire (the fly-wheel is mounted on the motor-shaft itself).
Quarry wire saws can be used for large primary cuts (up to 300 sqm) as well as for small bench cuts. As for machine capacity, you may consider that the installed machine power in hp, times 3, gives the maximum cut in sqm on marble and times 4 on granite. For example, a marble quarry saw with 45 hp installed power can cut a bench of up to 45 x 3 = 135 sqm. Although granite is much harder than marble, granite cuts can be much larger. This is due to the fact that cutting on marble lets the wire easily penetrate into the material and therefore the friction becomes high. On granite the wire penetrates very slowly and so there is less friction (but the cut proceeds slowlier).
The cost of the only quarry equipment (drillers, splitting devices, saws, tools and consumables) for a small granite quarry is 200.000 - 250.000 USD.
Wire costs are about 100 USD per meter for marble wire and 150 USD for granite wire. Some local suppliers are cheaper. Wire life for marble is up to 70 sqm, for granite up to 15 sqm per linear m of wire, depending on hardness and abrasiveness of the materials. Production per linear meter is between 1 and 3 sqm/h for granite and between 5 and approx. 15 sqm/h for softer material.