I am in the process of restoring a very old artisanal table saw (because why not). My question is what is considered an acceptable level of runout in the blade? I am measuring no more than .125mm in the arbor .005" to you imperial lads, but the blade itself I’m getting up to .4mm (towards the outside of the blade). It’s a brand new Freud blade and I would have thought it had better tolerances than that.
For abundant clarity, I’m not talking about runout from the miter slot or fence but just a static reading as I rotate the blade. Is this normal or have I got a dud blade? Am I measuring incorrectly?
I would expect the blade to be larger. The runout is really an angle. So the blade should have larger runout than the arbor.
The tolerances really depend on your work and what you want to achieve. That isn’t going to make tight dados. But it will cut framing and trim really well.
For my craftsman, a popular accessory was a PALS system. It basically holds the trunions with screws so you can make fine adjustments to the trunions to get things lined up. But you could also consider buying a new arbor if the shaft is bent.
Appreciate the reply - now that I have given it more than 10 minutes of thought you’re completely right. You would expect any runout on the arbor to be exaggerated by the time you reach the edge of the blade. I was a little confused as the literature seems to suggest that .005" on either blade or arbor is acceptable but if you have .005" on the arbor you’d have to have more on the blade.
