Unisaw arbor spinning when removing blade

[Duncan Foster]

Hi I have about 25 Year old Unisaw (34-802). When I go to remove the blade Off the arbor, the arbor spins a little bit along with the nut and the blade will not come off. It then kind of "catches" and the nut spins off. I don't really notice any movement when I'm installing a blade. Is this something I should be concerned about going forward?
Thanks for the help

[Jim Andrew]

My Unisaw has a wrench that holds the blade from spinning while I use another wrench to take the nut off. Do you have that wrench to hold the arbor from turning?

[Duncan Foster]

My Unisaw has a wrench that holds the blade from spinning while I use another wrench to take the nut off. Do you have that wrench to hold the arbor from turning?
Hi Jim. No I don't. Have simply been shoving a block of wood under the blade to keep the blade from moving. Just have one wrench for the nut itself

[Matt Day]

Maybe the blade is spinning on the arbor when you turn the nut.

If you have a flat on the backside, use a wrench back there too. That should solve it

[Duncan Foster]

Maybe the blade is spinning on the arbor when you turn the nut.

If you have a flat on the backside, use a wrench back there too. That should solve it
Awesome. Thanks much

[Steve Baumgartner]

To clarify: the Unisaw has no arbor lock. The only thing that keeps it from turning is the resistance of the motor and belts. As soon as the nut loosens a bit, the blade no longer provides enough friction to prevent the arbor from turning if the nut is stiff (e.g. if the arbor threads or nut are a bit damaged). As others have written, there is normally a thin wrench to grab the arbor on the side opposite the nut.

[Dan Hahr]

Clean the arbor threads. Any crud will cause this. The nut should spin on and off.

Dan

[Greg Sznajdruk]

On my saw behind the flange on the arbour there are to flats which a thin wrench fits to hold the arbour in place.

Greg