Originally Posted by
Lee Schierer
How does one damage two arbors on a table saw?
I thought the answers I have posted were clear, but apparently not. I don't think it was how the saw was operated, but I would be bias in that regard. I am not sure how you could do the damage ripping lumber. I mostly start with 4/4 rough cut hardwood and size it.
The first thing I notice is the saw starts to vibrate which increases over time (I let it go a few months so more damage was probably caused by continuing to run the saw). The bearings did spin on the arbor both times. The saw was purchased new in 2000 - Grizzly assembled it. 2008 , the bearings spun on the arbor. I changed the bearings and installed a new arbor, noting that the shaft is about 0.001 smaller than I can find as a recommendation in the bearing manufacturers catalog for woodworking machinery. Maybe there is something special about a table saw, but I highly doubt it. Now 12 years later, the same thing happened. The bearings were pushed on, not hammered on - when installing the bearings on the arbor, they slid on once they were lined up. Force was applied to the race being pushed on - not
I suspect the issue is the loose fit between the inside race and the arbor. Normally, the fit is tight for the spinning race and loose for the stationary race.
Other factors could be too much belt tension, maybe one too many belts that ends up overloading the bearings when the belts are tightened. You would think you would take out the motor bearings before the arbor bearings, but that isn't always the case.
Last edited by Rich Aldrich; 02-27-2020 at 4:54 PM.
Thank you,
Rich Aldrich
65 miles SE of Steve Schlumpf.
"To a pessimist, the glass is half empty; to an optimist, the glass is half full; to an engineer, the glass is twice as big as it needs to be." Unknown author