Lapidary saws require special oil-based or water-based lubricant to cool and lubricate the saw blade as it cuts through the stone. Consult your manufacturer’s instructions for recommended lubricants for bridge cutting machine.

The lubricant is generally held in a reservoir under the saw’s cutting table. The bottom of the saw blade dips into the liquid. As the blade spins, it picks up the lubricant, continually delivering it to the slice being made through the stone.

A good guideline for ideal saw operation (whether slab or trim) is to ensure that your blade is approximately 3 times as large as the stone that you’re cutting. If your stone is too large for your blade, the friction could harm your machine or break your blade.
Saw blades come in a variety of sizes, thicknesses, and “kerfs” (the width of the line that is cut through the stone by the saw blade). The kerf is generally wider than the blade’s thickness due to abrasion. Match the thickness of your blade to the type of stone that you’re cutting. Hard stone needs a thicker blade that is less likely to break; valuable gem-quality stone benefits from a thinner blade to ensure a less wasteful kerf.

There are two types of cutting edges: sintered and bonded. Sintered blades contain abrasive throughout the cut-ting edge, helping them last longer.slab cutting machine's blades have abrasive bonded only to the exterior of the cutting edge and are generally less expensive than sintered blades.

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