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« on: September 24, 2015, 01:23:03 pm »
Get a small piece of metal that will fit between the jaws of the clamp. Take out the set screw, insert the metal between the clamp jaws, tighten the thumb screw to hold the piece of metal in place, put blue Loctite (as others suggested) on the set screw, tighten the set screw against the piece of metal. You now have the set screw flush with the inside of the clamp. Repeat procedure on the other clamp. Now you should have no bending of blades from clamping. The bends from clamping are generally called hockey stick bends.
The other place you can get bent blades (and this sounds like where your problem is) occurs when you insert the top of the blade to high in the upper clamp. When you do this and then flip the tension adjustment lever it can bend the top of the blade. To get the right blade placement - you may need to experiment some - you should first clamp the top by inserting the top of the blade around 2/3s to 3/4s of the way into the clamp channel. This is enough to clamp the blade and you do not get blade bend from flipping the tension adjustment lever. You do not have the same issue on the bottom clamp. You can appreciate why this happens on the top clamp if you watch what the top clamp does when you flip the tension adjustment lever.
Since learning these techniques I have not had problems with blades bending/kinking. You will love your saw more when you solve this issue. The DW788 tension adjustment is different so even though the clamping systems are nearly identical you do not have the problem if the blade is high in the upper clamp.