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Unisaw Arbor and Blade Alignment Tolerances

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Forum topic by mc79 posted 305 days ago 386 views 0 times favorited 4 replies Add to Favorites Watch
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mc79

23 posts in 579 days


305 days ago

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

1488 posts in 1000 days


#1 posted 305 days ago

I would say so.

-- I long for the days when Coke was a cola, and a joint was a bad place to be (Merle Haggard)

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unbob

286 posts in 410 days


#2 posted 305 days ago

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.

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mc79

23 posts in 579 days


#3 posted 305 days ago

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?

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mc79

23 posts in 579 days


#4 posted 278 days ago

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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