Thread: Arbour bolt coming loose...

I'm not an expert on table saws, but I do have a decent one....the nut for the arbor tightens in the opposite of the rotation. A "snick" tight to put it on... and it's always tighter to take off when changing blades.

Perhaps you could ensure the bolts inside face is rough sanded a bit to give that surface grip as its tightened?

If the nut has any wobble, order a new one from an engineering firm. I bought 2 from a bolt company (to replace the "ok" original) in fyshwick (Canberra) and they are very precise fitting. It's nice to turn them....they engage exactly.

Not sure if this is pertinent to your saw, but I watched a video on setting up table saws when I first bought it.

- ensure the runout on the arbor flange is very small (1/1000th of inch).
- ensure the washer that goes under the nut is flat. Use a sharpie to highlight the entire bottom and use the wet stones to get it dead flat.
- made a stick to hold the blade when I tighten the bolt so I don't randomly jerk the blade. Keep the tightening smooth and goldilocks.

The runout on my blades is non existent. It's not a fabulous saw, but it gives me great performance once I took the time to really get it set up spot-on.

Perhaps if the saw is labouring, getting a thin kerf blade like the Freud Premier Fusion would help?

Just a thought. Is it possible that the blade is too high and the flanges are being contacted by timber or sawdust?