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Slab Cutting

SPX Solution a Cut Above for Slab Cutting:

Conventional methods for "turning" cuts in a limestone quarry consist of pulling the slab from the face using cranes and cables. A typical cut is 60-feet long, 4-1/2-feet wide and 12-1/2-feet high.

At approximately 250 tons, these slabs are dangerous and difficult to turn. Cables can break and whipsaw anything in their path. Equipment can also tip, break or fall. Power Team® brand equipment from SPX provided an Indiana limestone company with a safer alternative.

Inflatable Jacks Provide a Safer Cut

Instead of traditional cranes and cables, the limestone company implemented use of Power Team® IJ7320, 73-ton inflatable jacks to push the cut away from the face. The inflatable jacks are equipped with shutoff valves and dual controls.

After 100-ton hydraulic rams crack the limestone away, the 7/8-inch thick jacks are inserted into the gap and inflated. As the gap widens beyond the capacity of the single jack, additional jacks are stacked together and lowered in the crevice. The process is repeated until the cut is turned.

The ability to carefully position the inflatable jacks and the jack's powerful controlled push provided an additional margin of safety, saving time and helping to reduce stone breakage.