Table saw blade tension

[JobandKnock]

Saw makers can retension blades, but on lower cost blades it probably isn't worth the manpower, Found a description of the process on this USA site of York Saws, I think once you've comprehensively cooked a blade the way the OP has, though, that it's beyond redemption

 

[baldkev]

@TheTiddles You know theres lines machined into blades, i believe they are a form of tension, created when those lines are pressed into them....

 

[Inspector]

Usually done on big blades but a good saw filer can do the same with small blades. Not often done on them because of the economics.


Pete

 

[TheTiddles]

Found a decent paper on it (eventually), lots of websites out there with lots of long words and not a lot of science, here it is…

https://www.dynardo.de/fileadmin/Ma...014_ParallelSession_Optimization2_Weiland.pdf
Looks like tensioning is rolling a seam into the plate part way out across the blade from the centre so the blade has less ways of wobbling whilst it’s spinning, so it cuts straighter. Small blades are proportionally stiffer so it’s less used in them.

The slots at the edges and on the plate are to reduce warping from expansion and reducing vibration respectively.

 

[isaac3d]

Found a decent paper on it (eventually), lots of websites out there with lots of long words and not a lot of science, here it is…

https://www.dynardo.de/fileadmin/Ma...014_ParallelSession_Optimization2_Weiland.pdf
Looks like tensioning is rolling a seam into the plate part way out across the blade from the centre so the blade has less ways of wobbling whilst it’s spinning, so it cuts straighter. Small blades are proportionally stiffer so it’s less used in them.

The slots at the edges and on the plate are to reduce warping from expansion and reducing vibration respectively.

Ah, thanks for that. I was wondering how you would introduce tension in to a circular plate of metal, but I hadn't got around to doing any research on the subject; busy busy busy. My new table saw arrives today; a Charnwood 8'' Cast Iron Table Saw. Not the biggest table saw in the world but better than what I had.