Arbor bearing question...Delta Unisaw...

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Forum topic by speakerscott posted 02-18-2014 05:26 PM 1151 views 0 times favorited 1 reply Add to Favorites Watch
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47 posts in 3865 days

02-18-2014 05:26 PM

I’ve been trouble shooting some blade wobble on my late 90’s US made Unisaw. I found one problem, my matched belts are no longer matched, one of the three has taken a set and is longer than the other two. I’ve reduced my saw to a two belt saw (outside two grooves) and it’s much better. Thin kerf blades still wobble but the standard kerf blades don’t

I measured the runout at the end diameter of a blade and found it to be +/- .0015 or so, which is far better than I expected.

The question is how spinny should the arbor be without the belts on? It spins freely and using a mechanics stethascope (screwdriver) I don’t hear anything particularly bad. Give the blade a good hand spin it will spin for a while, but does slow down fairly rapidly. Should it be like a skateboard wheel that just keeps going?



-- Scott, Austin-Texas...

1 reply so far

View Mark Shymanski's profile

Mark Shymanski

5621 posts in 3739 days

#1 posted 04-16-2014 12:07 AM

I would think that the length if spin would somewhat be dependant on the grease as well as, of course, the condition if the bearings.

-- "Checking for square? What madness is this! The cabinet is square because I will it to be so!" Jeremy Greiner LJ Topic#20953 2011 Feb 2

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