i recently bought a used upgrade set of tables(500 to 510) that came with a shopsmith wobble dado that was mounted on a shopsmith arbor among other things. when i removed the arbor which was very tight(it took two of the large arbor wrenches) the tongue was missing on the washer but there was no damage to the arbor. that kinda puzzled me. figured it happened before i got it. was going to put it on my list for my next order from shopsmith if it is even available by itself.seems cost prohibitive to order it by itself. could not find it online or in any catalog that i have. maybe if someone has any paperwork from the molder/dado arbor it might have a part number.
1954 greenie, 1963 anniversary edition now a mini,
1984 500, 1985 510, 1987 510, pro-planer, bandsaw, dust collector