Thread: Blade runout

Even .03" is around .8mm, which would be considered totally unacceptable IMO. You do mean runout, or are you trying to align the blade with the mitre slot?

Just confirming....you sure it's 45 thou and not 4.5 thou? Because that's insane and should definitely be returned.

Hey guys, definitely 45 thou, the attached images give an overview of the measuring setup. The deviation or run out was measured with the verniers zeroed at the lowest (or farthest away from the mitre gauge/vernier mount) and then rotating the blade 180 degrees to the known high spot. As you can see it is every bit of 45 thou. Anyway, with this information in hand I spoke to the good folk at Trade Tools, and they concurred that this unit was a dud and cheerfully replaced it. Needless to say, I ran exactly the same procedure on the new saw before leaving the store and found that it had negligible runout (about 2 thou) but that's with the stock blade and they're not great. A decent blade and I feel it'll be spot on.

Glad to hear it was a no fuss swap

Glad you got it sorted. I have those exact digital callipers, and just so you are aware, they read in metric too!
At 56 you’re too young to be using imperial.

Originally Posted by jack620

Glad you got it sorted. I have those exact digital callipers, and just so you are aware, they read in metric too!
At 56 you’re too young to be using imperial.

Hahaha, thanks Jack, you're too kind. The funny thing is, despite being taught metric at school, I did an apprenticeship as a Blacksmith from '83 - '87 and everything was measured in imperial. Then from 1990 - 2001 I worked in a jobbing shop as a welder and occasional machinist which also had a heavy bias towards imperial. Even when I do work in metric (only with tight tolerance dims), I find myself converting it back to imperial as I just find it easier to visualize as a relative distance.

Originally Posted by Harry_B

I find myself converting it back to imperial as I just find it easier to visualize as a relative distance.

I understand. I do the opposite. I guess it's what we were raised on. I have a mental model for what 1.1mm looks like, but no metal model for what 45 thou looks like. Thank goodness for calculators.

I quite happily work in both. Just as well as I have an imperial scale on the router table and metric on the table saw. Thankfully woodwork isn't an exact science.