Saw Blades

[Beave2012]

Here's photo.



The washer is bottom right in the group of four. Notice the little square projection toward the center. It fits in the slot (keyway) visible on the threaded part of the arbor.

ALWAYS USE IT when using this arbor.

Ah I see, so that's what all those extra pieces are for in my junk bucket, they combine to make an arbor

[BuckeyeDennis]

It isn't recommended by Shopsmith to use the dado/molder arbor with saw blades. I don't know what all the reasoning is, but I do believe you will get interference with the tie bar guard if you try to push the table up against the rubber table spacer.

That said, Shopsmith also sells an excellent 5/8 saw blade arbor that will work with any 5/8 blade.

In addition, some blade makers (Forrest) will give you a 1 and 1/4 bore on their blades.

Lastly, I was a Forrest WWII snob until I ordered the three Shopsmith blades. They are excellent. And having an arbor for each blade makes changes a snap.

You must use the a locking tongue-washer with the dado/molding arbor if you use it for a 10" saw blade. Not Recommended. Over time, the spinning of the saw blade will unwind the nut when the motor is stopped if a locking tongue-washer is not used. I know from experience. A loose saw blade spinning inside the table insert is very dangerous. I have been unable to find a replacement 5/8" locking tongue-washer for the dado/molder arbor as it gets lost/misplaced when used Shopsmiths are sold.

This is probably a dumb question, Bill, but did you try the mother ship? I bought a couple of the 1/2" I.D tongue washers (PN 501486, for the shaper arbor) from them a while back. The price was $1.19 each.

[JPG]

Why a keyed washer.

NOT limited to saw blades!!!

The washer is needed when the retaining nut has a right hand thread AND the nut is 'outboard' of the thing being retained [TBR](saw blade/molder head . . .).

Under load the TBR will apply torque to the nut. Since the SS runs counter clockwise(viewed from the end of the arbor/nut side of TBR), that would exert a 'tightening' force to the nut. The opposite is true when the motor is stopped(blade exerts loosening force due to inertia). The keyed washer stops that force with the key.

Now how come the same is not true with the left hand threaded nut on the inboard side? I conclude that with the large nut, the area is sufficient to preclude it becoming loose by the inertia of the TBR.

Now the molder/dado arbor vs saw blade arbor admonition has to do with the amount of the arbor extending outward past the saw blade. Think trunion etc. interference.

FWIW, mounting anything on the rear shaft also requires the keyed washer(think grinding wheel).