Arbor washer type

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Blog entry by Jose posted 09-08-2015 05:29 PM 1103 reads 0 times favorited 4 comments Add to Favorites Watch

I just bought a Freud Diablo Dado set from HD and so far, this being my first time ever using one, it has worked well. I made my first perfect dado test cut after only a few tries. The problem I have is that the arbor on my Ridgid R4510 is not long enough so I’m limited to the width I can set for dados. Now, I see that the arbor washer is the standard concave shape all table saws I’ve seen have. Could I replace the washer for a FLAT washer that has the same thickness as the factory washer? I think that by doing that I could successfully add one more blade and still have some threads in the arbor showing. If I add one more blade with the factory washer, the nut sits flush with the arbor’s end which I read is not safe. Any thoughts or advice? What is the purpose of the washer being made in that particular shape?

-- Jose

4 comments so far

View squazo's profile


303 posts in 2886 days

#1 posted 09-09-2015 01:28 AM

I have a porter cable porter cable 270ts and the instructions tell me that I can just not use the washer when I am using the dado, it also tells me that I can use a max of 15/16 dado width which I often exceed. The manual also says to not use profiling heads in my saw (which is BS I have used plenty of profiling heads in it). though more and more now I just rout dado’s.

View Jose's profile


105 posts in 2894 days

#2 posted 09-09-2015 02:22 PM

So I checked the user manual and found that the saw accepts dado width up to 3/4”. This note below also intrigued me:
“NOTE: The blade washer may be used provided the arbor shaft extends slightly beyond the arbor nut.”
Does that mean that if the arbor does not extend enough with the stack then the washer can be removed and only the nut is used? I’m assuming Ridgid is saying that the washer is not necessary and that it’s safe only using the nut? I believe it but I want to make sure with you pros first.

-- Jose

View jumbojack's profile


1691 posts in 3865 days

#3 posted 09-09-2015 03:34 PM

-- Made in America, with American made tools....Shopsmith

View Grumpymike's profile


2497 posts in 3556 days

#4 posted 09-10-2015 12:21 AM

Years ago I had a direct drive saw and to use the dado, I used one of the blade stiffener sets as the arbor washers.
Using them gave about 1/2 inch more arbor shaft … Used that setup for about a year then bought a real contractors table saw … Now I have a cabinet saw.

-- Grumpy old guy, and lookin' good Doin' it. ... Surprise Az.

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