What makes a blade stop cutting?
The most common reason for a blade not cutting is usually a misapplication. A loss of cutting speed is most often encountered on harder materials which have little or no abrasiveness. A hard bonded blade used on a hard material will not wear properly. It cannot wear away at a fast enough rate to keep diamond exposed and keep cutting the hard material.
Why won't my block or asphalt blade cut hard brick or concrete?
Block and asphalt are very abrasive. A blade designed for these materials must have an extremely hard bond. A blade for brick or hard concrete must have a much softer bond in order for the blade to wear properly in a material with higher P.S.I. and less abrasiveness. A blade which is too hard will not wear properly. It will not expose any new diamond, and it will stop cutting.
Why shouldn't I use my brick or concrete blade to cut block or asphalt?
Brick and hard concrete are hard to cut and low in abrasiveness. A blade designed for these materials must have a softer bond. When a softer bonded blade is used on a highly abrasive material, this is very destructive to the soft metals in the blade. The result is premature release of exposed diamond and an early death to your diamond blade.
What are the pros and cons of combination blades?
A combination blade can be very convenient when the job you are working on requires the blade to be used on several different materials. However, a combination blade may not be the most cost effective choice if you are working with mainly one type of material. It may have premature wear or poor cutting performance compared to the specific blade for a particular application.
What is the difference between a wet blade and a dry blade?
The main difference is the way the diamond matrix is attached to the core. Wet blades are brazed, while dry blades are generally laser welded. Laser welding has a higher melting point. Besides the weld, another difference is the bond. Dry blades usually have a slightly softer bond to allow easier cutting without water to cool and lubricate the cut.