duckkisser Posted September 13, 2011 Report Share Posted September 13, 2011 anyone ever had a weld on a band saw blade break....had that happen scared the hell out of me the teacher and the kids working it.....thought that the kids twisted the wood at first but the board was a strait cut. the weld just gave out thinking about calling company rep raising hell and see if we get any free bee iteams. sounds bad but got to get everything we can when we have such a low budget. Quote Link to comment Share on other sites More sharing options...
PaulMarcel Posted September 13, 2011 Report Share Posted September 13, 2011 That's a pretty common place for them to break. More important is where the blade went when it broke. I try to never stand on the side of the saw since that's where the blade will often loop out when it breaks. The family dog is fixed; that's enough. Edit: a common "user error" that leads to the weld breaking is setting the guides too tight, whether ceramic, 'cool blocks', or bearings. When you set the guides for a blade, always do it over the weld. 1 Quote Link to comment Share on other sites More sharing options...
woodhack Posted September 13, 2011 Report Share Posted September 13, 2011 Junior high school shop class, I was waiting my turn for the bandsaw when the blade snapped. Scared the crap out of me. It sounded like someone shot a gun. Fortunately no one was injured. Quote Link to comment Share on other sites More sharing options...
PaulMarcel Posted September 13, 2011 Report Share Posted September 13, 2011 Junior high school shop class, I was waiting my turn for the bandsaw when the blade snapped. Scared the crap out of me. It sounded like someone shot a gun. Fortunately no one was injured. Underwear are people, too Quote Link to comment Share on other sites More sharing options...
TimV Posted September 13, 2011 Report Share Posted September 13, 2011 Yes, they break. And most of the time it is at the weld. They break there because the welding operation imparts an extreme amount of heat into the band metal at that point. When that happens it makes the metal more brittle. This is typically not a problem but sometimes on smaller saws that the blade has to go around a smaller diameter wheel, this continued flexing of the more brittle point will cause the blade to break. As Paul-Marcel said, heat is a culprit to causing the blade to break. This is caused by too to tight of blade guides and even too high of tension. Quote Link to comment Share on other sites More sharing options...
tim0625 Posted September 13, 2011 Report Share Posted September 13, 2011 To add to TimV...blade tension plays a part in this. Just don't overtighten. The blade is more brittle at the weld, guides too tight, too high of a high tension, and a bind and pow. Quote Link to comment Share on other sites More sharing options...
Eric. Posted September 14, 2011 Report Share Posted September 14, 2011 Junior high school shop class, I was waiting my turn for the bandsaw when the blade snapped. Scared the crap out of me. It sounded like someone shot a gun. Fortunately no one was injured. A kid lost the tip of his thumb at the bandsaw in my highschool shop class. He probably thinks paper beats scissors, too. Another kid got a chunk of wood lodged smack in the center of his forehead when a walnut bowl exploded at the lathe. How shop classes still exist today I have no idea. Waivers work I guess. Quote Link to comment Share on other sites More sharing options...
duckkisser Posted September 14, 2011 Author Report Share Posted September 14, 2011 well first off any teacher that lets a kid do turning without a full face mask is asking for trouble and we do a safety test for each machine before then can touch the tool Quote Link to comment Share on other sites More sharing options...
andreas Posted September 14, 2011 Report Share Posted September 14, 2011 Lee Valley sells a repair kit for bandsaw blades. I've never tried it though. http://www.leevalley.com/en/wood/page.aspx?p=41049&cat=1,41036,41048 Quote Link to comment Share on other sites More sharing options...
Woodog Posted September 14, 2011 Report Share Posted September 14, 2011 Most of the schools around here have done away with all the wood shops. Quote Link to comment Share on other sites More sharing options...
duckkisser Posted September 14, 2011 Author Report Share Posted September 14, 2011 i think the repair kit cost as much as the set of 3 different blades. rather have the thicker blade on there anyways so that i can now cut up some logs for a demo on lumber manufacturing. Quote Link to comment Share on other sites More sharing options...
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