Masonry Magazine November 2004 Page. 29
A blade that will not cut can be the result of a number of factors.
Blade will not Cut
A BLADE THAT WILL NOT CUT can be the result of a number of factors. The first is that the blade specification may not be the proper one for the material being cut. The operator should examine the segments on the diamond blade with a loupe to find out why the blade is not cutting. If the operator finds that the surface of the segment is smooth and that the diamonds are not protruding, then the diamonds may be too friable, the bond too hard or the speed of the blade may be too high. On the other hand, if the operator finds that the diamonds are protruding too far from the bond with little bond support, then the bond is not resistant enough for the abrasive material being cut, or possibly the diamond/bond combination is not right for the application.
If the operator examines the segment surface and finds that many of the diamonds are missing, then it is safe to assume that the diamond impact resistance is not sufficient or the combination of the diamond/bond is not right for the cutting application. The operator may find the diamonds in place but with an abnormally high amount of fractured or crushed crystals. The blade may cut fast initially, but its overall life is short because the diamonds are too friable or the blade has been subjected to excessive pounding.
Another scenario is that the blade cuts well initially but then slows and eventually stops. The operator may find that the diamonds are in place, but are smooth or have flat tops and are still protruding above the bond surface. In this case the diamond may be too impact-resistant, too large a mesh size, too high a concentration, or the diamonds may just not have been pushed to their designed operating condition.
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The Voice of the Mason Contractor
November 2004
Masonry 27