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Gang Saw versus Diamond Wire Saw

The cost of 1 steel blade for granite gang-saw is about 8 $ (about 1 $ per kg). The cost of 1 kg of steel shot is about 0,5$. With 1 steel blade you cut about 15 sqm and for each sqm you need about 2,5 kg steel shot.

Therefore tool cost per sqm is the following:

( 8$ / 15sqm ) + ( 2,5kg / sqm x 0,5$ / kg ) = 1,78 $/sqm

On a stationary diamond wire saw you need about 20 m of wire. At a cost of about 100$/m the complete wire will cost you about 2000$. If we presume a wire yield of 10 sqm per linear meter of wire, the production of 20 m of wire will be:

20m x 10sqm = 200sqm.

Unit cost of production due to tools will therefore be

2000$ / 200 sqm = 10$ / sqm

The big costs of a granite gang-saw are for the machine itself (about 200.000$) and for the foundations (about 25.000$). Anyway, both machines have their own specific field of application.

The gang-saw is more suitable for mass production of thin slabs. In fact, normally there have to be used two (or four, or eight) machines in order to guarantee a continuous material output to the polishing line. As the machine needs about 2 1/2 days for cutting one loading, it is necessary that while one machine is working, the other machine can be unloaded.

Apart from block-squaring for fitting them into the gang-saws without loosing space, the application of a diamond wire saw is more for the production of few slabs, of more expensive material and different thickness. This would absolutely not be economical to do with a gang-saw.

Also cutting speed is quite different between the two systems: a gang-saw cuts at a speed of 5 cm/h, a diamond wire saw at about 100 cm/h.

Therefore, there is a frequent need of few slabs or thick slices in short time, you use a stationary wire saw, if you need lots of thin slabs continuously, you go for a gang-saw. So the two systems are complementing each other.

Finally, there are some further advantages of a wire saw:

* can be used on granite as well as on marble, travertine, etc.

* there are no vibrations

* it does not make any noise

* it can be installed outside

* low shipping costs for the wire against higher costs for the blades

* water recycling is less complicated as there is no steel-shot and no lime

* it needs much less space.

About the author of Gang Saw versus Diamond Wire Saw
Georg Blank
The background stone is Black Zebra from Pakistan.
RUN 0.185 MEM 4,095 SYS 0.02 0.3 0.41