Originally Posted by
A_Camera
"Similar" but not the same. All similar saws are similar in design, but there are some differences, some of which I mention in my video also. Anyway, it is difficult to say anything about your issues, because you didn't even say which make and model it is. We also have no idea about how you use yours. I don't know how long my blade will last, but definitely more than 10 cuts, that's for sure, since I have already made more than 10 cuts, most of these in steel, some in pretty hard, large(ish) and thick steel. I know that the blade makes a difference, my next blade will be Bahco, which is about four - five times more expensive than the cheap ones.
I know that the blade is a weak point, especially the welding, since that gets the most beating also. But how fast the blade brakes depends also on the quality and the way the machine is used and maintained. I think many of these machines are severely abused, used as they unbreakable. Many people are pushing the machine down while cutting, and not using the right speed. I hold it back and let it cut the material, and also adust the speed up or down, depending in the material. Many people spray the blade when cutting, and that's one of the worst thing you can do with these, because these machines are made for dry cutting, if you spray the blade the metal dust gets stack to the blade, the blade carries the dust in through the bearings, some of the dust settles onto the bearings and gets inside the bearings, destroying it, or slowing it down, and as a result, the blade wear will increase. The metal saw dust, which didn't release from the blade when it touched the bearings will continue to the rubber wheels, some will dig itself into the rubber and damages it, causing rubber wear and blade slipping, which cause additional heat, and can result the user pushing the saw harder in an effort to counter act the slipping, which increases the heat even more, causing even more blade and rubber wear. Some saw dust will be thrown off the blade and the drum and will end up in the hub of the freewheeling wheel, the one near you. That wheel rotates without any bearing on a steel rod axle, which can get jammed of all the garbage. Speaking of the freewheeling wheel, have you ever checked the blade alignment? Mine was not aligned properly, so the blade was too deep down, the teeth were on the rubber, which is not good, because it would chew up the rubber. The wheel must be aligned so that the teeth are just above the rubber. Some saws (like mine and the Scheppach MBS 1200, has an alignment adjustment screw, so I adjusted mine on day one.
So there are many reasons why the blade breaks, I really don't believe that it's normal that regardless of blade quality, you can only cut 10-20 times with your machine before the blade breaks. Something must be wrong with your machine or the way you use it.