Replies

1. 
   gulfstar | Jun 27, 2022 07:56pm | #1

   What are you using to rotate the blade? if it’s on you table saw, I doubt the repeatability of a woodworking machine is within the measurements you are making.

1. 
   user-7627473 | Jun 27, 2022 08:38pm | #2

   Rotating on tablesaw arbor. Perhaps not on repeatability... but I have other Forrest blades that are under 2 thou

2. 
   Deleted | Jun 27, 2022 08:38pm | #3

   “[Deleted]”

3. 
   user7596380 | Jun 28, 2022 01:12pm | #4

   The "Repeatability" of the table saw is easily checked with a dial indicator mounted w/articulating arms on a magnetic base and a few simple setups. Check for any play whatsoever of the arbor shaft and its mounting, the motor mounting carriage, etc. first, of course. Check arbor runout. Check for square of the point on the arbor shaft where the blade rests against when it's tightened on the shaft, etc. Once you know all that, then you can check a blade for true.
   The point is has your saw been knocked out of alignment? If it has that would explain the readings you're getting. If the saw is still tight and true, then its the blades.

   Addendum: Are you using Blade Stiffeners? If so, have they warped? If not, would they help? Also one more small, simple item could be amplifying a problem; any dirt, grit, sawdust, anything at all between the blade and the washer, or between the washer and the nut.

1. 
   user-7627473 | Jun 28, 2022 09:00pm | #6

   I use a couple dial indicators. I havent checked arbor itself because other blades I have are within spec during rotation. I have a new Ridge blade will test out tomorrow. All mounting bolts tight. All mating surfaces are clean - and typically use a 4" stiffener.

2. 
   Deleted | Jun 28, 2022 08:59pm | #5

   “[Deleted]”

3. 
   Blam | Jun 29, 2022 05:26am | #7

   Yes, had a similar incident, also our 5 thou. Service was good as with your case, too.

4. 
   user-7627473 | Jun 29, 2022 10:51am | #8

   Just tried the new Ridge blade and was just under 2 thou runout - which is slightly more than their spec and little less than Forrest. By the bye, quality control during/post pandemic has been a wonder to behold. One of the best was the brand new Dewalt router that developed issues starting up, worked fine though once started, then finally stopped working altogether. Thought it was dust initially - then opened it up to find that one of the brushes had never had a screw securing it to housing. It was buried down next to commutator ground to a small wedge.