I just purchased a Freud SD508 8" super dado set for my Delta contractor's saw.
There is a compression washer (cupped) that normally sits between the nut and the blade. However, with this washer installed, I cannot come close to fitting the entire stack on the arbor. Even at 3/4" stack, the nut just not have any thread exposed on the outside (it seems to be snug but I would feel better if it had some thread exposed).
Is that washer necessary when using the dado blade? I would use it when it fit but if I used the larger stacks without it do you think it would be a problem?
Thanks for your help.