(It depends on a number of variables. Diamond concentrate, Mesh Size of the diamonds, Aggregate, coolant; amount of water being used, HP of saw, operating speed or RPM of saw, depth of cut, length of cuts, etc)
ie; a 7mm segment height blade may outlast a 15mm segment height blade if there is less diamonds in the 15mm segment! the metals that make up the segment do not cut anything - the diamonds do! So, if the 7mm blade has 3k in it, and the 15mm has 2k... well, you do the math!
Myth # 2 - "General Purpose Diamond Blades are fine for cutting any type of material."
(Generally speaking, a general purpose diamond saw blade that is spiing at thousands of RPM's will cut anything in its path. However, that doesn't mean it should! A diamond blade that is tensioned and bonded to cut cured concrete with wire mesh & rebar in it, is not going to cut asphalt very well. It will cut, but it will burn out quickly. Same holds true for a Asphalt Blade cutting Cured Concrete, etc. (Hard bonds cut soft, or abrasive materials, and Soft bonds cut Hard materials.) Now, with NEW Technology, some manufacturers have been able to make blades with different bonded segments, or sandwich segments of multiple bonds. These are TRUE General purpose, "Cut-All" diamond blades." Look here.
Myth # 3 - "Cheap Blades work just as good as expensive blades"
(This really depends if somewhere along the line, you bought a cheap diamond blade at a high price in the first place. Dont be fooled by sales mumbo jumbo. As with everything else in life, you get what you pay for. There are no shortcuts. Two blades can look exactly the same, but one may last 5x longer than the other!) Its all in the bond, tensioning, etc.
(There are many different styles of blades, and grades of diamonds. Just like diamonds in jewelry... If the mesh size of each individual chip size is bigger, than the blade will cut more aggressively. Its that simple. If there is more diamond, or a higher concentrate of chips, then it will cut better.
Recap:
Try some different blades, build a rapport with your supplier, and stick to someone loyal. Unfortunately, there is a lot of "trash" spoken about during the sales process of diamond tools, and equipment. Be careful, pick your supplier wisely. Especially online! Is the site secure? Is the business a business, or just somebody looking to "push blades" for a profit? At Precision Diamond Tools, Inc. we are dedicated to making your diamond blade & cutting tools shopping experience be easy, informative and completely consistent. Bookmark us for more educational info and supplies, when you have a chance! www.PrecisionDiamondinc.com
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