Unisaw Arbor and Blade Alignment Tolerances

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Forum topic by mc79 posted 06-23-2013 05:06 PM 1023 views 0 times favorited 4 replies Add to Favorites Watch
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23 posts in 2042 days

06-23-2013 05:06 PM

Can you guys please tell me if these readings are acceptable for a “new old stock” 5hp X5 Unisaw that was still unopened in the box and crate when I bought it. I put descriptions of the arbor tests to make sure I have named them correctly. If not, what would be the cause and fix?

Arbor Shaft Runout (at smooth part of shaft in between threaded part and the arbor flange): .003”
Arbor Flange Runout (at very outer edge/rim of face of flange that touches the blade): .0005”
Blade Parallelism to the miter slot: .001”
Blade Runout: .001” with Freud Crosscut Blade and .005” with Freud Thin Kerf Rip Blade.

Is this ready to make accurate clean cuts?

4 replies so far

View Fred Hargis's profile

Fred Hargis

4956 posts in 2463 days

#1 posted 06-23-2013 06:30 PM

I would say so.

-- Our village hasn't lost it's idiot, he was elected to congress.

View unbob's profile


809 posts in 1873 days

#2 posted 06-23-2013 07:00 PM

It would seem to me .003” is quit abit for the smooth part of the arbor shaft, though that may not make alot of difference, it would add to vibration, at the speed of a saw blade.
My Delta Saw is a 12/14, bigger saw, but the arbor shaft has 10 times less run-out. That saw runs very smooth.

View mc79's profile


23 posts in 2042 days

#3 posted 06-23-2013 07:03 PM

That was the only reading I was really worried about but when the others were better I thought I might be ok. What would be involved in correcting that: new arbor shaft or new arbor bearings?

View mc79's profile


23 posts in 2042 days

#4 posted 07-20-2013 06:02 AM

Final Update!

It was just the belts all along. New belts solved the noise/vibration issue. I ended up using the Dayton belts that were suggested earlier in the thread.

The “clicking” when i tugged on the arbor was actually a noise being made by the saw sitting on the mobile base and was not coming from the arbor. I didn’t realize until I went back to inspect and try to duplicate the noise. I was actually somehow rocking the saw and/or mobile base.

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