Problems with Ridgid r4512 table saw Arbor

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Forum topic by VTmeDAVE posted 10-14-2013 10:49 AM 2669 views 0 times favorited 4 replies Add to Favorites Watch
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2 posts in 2319 days

10-14-2013 10:49 AM

Topic tags/keywords: r4215 problem tablesaw arbor dado table saw

I just received my new Freud SD508 dado set and was really excited to try it in my Ridgid r4512 table saw and witness the perfectly flat bottom cuts that all the reviews claim. I loaded the saw up with both outside blades, (4) 1/8” chippers and (1) 3/32” chipper. As soon as I turned the saw on I noticed that there was a significant amount of vibration. (This saw has never vibrated, when i set it up I verified that it passed the nickel test). When i made the first test cut I was disappointed to see that there was a groove about 1/64” deeper than the rest of an otherwise flat bottom cut. It was easy to tell that this groove was cut by the first 1/8” chipper. So i removed that chipper, assuming that one of the teeth wasn’t ground properly, accounting for the vibration and groove. I was disappointed to find out that the next cut had the exact same problem, only the entire rabbit was now 1/8” narrower because of the chipper i removed from the stack-up.

After a bit of thinking i got the idea that the problem could be with the arbor of the saw, not the dado set. The threads of the arbor stop short of the small machined landing that a saw blade sits on. Between the threads and that landing is a portion of the arbor that has a smaller OD, which is wide enough for the chipper to fit in. This means that the first chipper is not concentric with the arbor, thus causing the vibration and non-flat rabbit.

So my question is: Has anyone else with this saw noticed this problem? Or do i have a lemon? The saw is about a year and half old, and i still have the receipt. I would hope this is covered under the 3 yr warranty, but I dont want to go through the warranty process if a new arbor has the same problem.

4 replies so far

View Matt C's profile

Matt C

24 posts in 1044 days

#1 posted 02-13-2018 03:15 PM

Feeling like an idiot posting to this 4 years later.

View WhyMe's profile


1169 posts in 2014 days

#2 posted 02-13-2018 03:49 PM

I’m surprised the post is 4 years old and you are the first response. ???

View scr5008's profile


26 posts in 1440 days

#3 posted 02-13-2018 06:00 PM

I have the same saw and the same dado stack. I have used the stack multiple times and have not noticed that at all. I’ll check the arbor on mine and report back. I bought my saw in 2016.

View VTmeDAVE's profile


2 posts in 2319 days

#4 posted 02-15-2018 09:17 PM

Since my post is finally getting some attention :-) I guess i can update it with my solution. Many years ago now, when I first discovered this problem, i fixed it by wrapping some aluminum duct sealing tape around the unthreaded portion of the arbor. I slit the tape so it was just wide enough to fill the gap, and laid just enough length in there to build the diameter up to match the threads.

Its been many years now and this one piece of tape has held up well. Im careful not to tear it when im changing blades, but other than that I rarely even remember that its there.

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