In general, a low-priced blade is suitable for small jobs or occasional use. For larger jobs or regular use, consider a high-priced blade. This blade will prove less expensive over time because it will eventually deliver a lower cost per cut.
Do not measure a diamond blade's value by segment height alone. Many other factors affect a blade's performance and value. Consider the diamond size, concentration and quality; the hardness of the bond; the cutting power or torque of the saw and how well the blade is matched to the material being cut.
WET vs DRY CUTTING
Choosing between a wet or dry blade is a matter of preference as well as job requirement.
It is not safe to use water when using a power hand saw or a similar tool that requires an electrical power source. For concrete saws, wet cutting is usually preferred because you can cut deeper when using water as a coolant. For tile and masonry saws, either wet or dry cutting blades can be used. For high speed cut-off saws dry blades are more popular, but they are often used wet to control dust.
Dry blades can be used either dry or wet, as the job or equipment allows. When used dry
these blades depend on the airflow around the blade to prevent excessive heat build-up during cutting. Every 10 - 15 seconds of cutting the blade must run for several seconds at full speed with no pressure. This cooling interval allows air to cool the blade. For this reason dry cutting is usually used for shallow cutting (I" - 2") or step cutting, in which shallow passes are made until the full depth is reached.
Wet blades must be used with water to prevent excessive heat build-up during cutting. A continuous water flow is critical. Using wet-cutting blades without water, even for a few seconds causes excessive heat and blade damage and creates a safety hazard. Check the saw or tool carefully before using a wet cutting diamond blade. Make sure it is safe to use the equipment with water.
Advantages
Disadvantages
Wet Cutting
No heat build-up
Reduced amount of dust
Water helps remove cuttings
Allows thinner more delicate cuts
Faster process than dry cutting
Wet masonry units are more difficult to lay
Requires planning for drying time
Problematic in cold weather
Dry Cutting
No water tanks and water hoses required
Eliminates water clean-up
Masonry units set up faster
No weeping or smearing of the joints
Must take pressure off blade periodically
Slower process than wet cutting
Units cannot be cut as thin as when wet cutting
Large amount of dust
Bon Tool Co. has made a serious effort to provide exact and current information, but does not guarantee the accuracy of the data. Bon Tool Co. cannot assume responsibility for the application of information nor guarantee results.
