[Woodworkers] Magna table saw L

[emeyers4 at rochester.rr.com]

Anybody have a 8 inch Magna table saw?  As you know Magna was the one who brought out Shopsmith 

 I ve changed a lot a table saw blades but never seen anything like this 

 One side of the blade has  a smooth washer with nowhere to grip a wrench 

 The other side has twin flats on the shaft for a wrench and a huge nut up against the blade 
 I have tried the obvious and put wrenches on both without luck .

 Afraid to apply any more force for fear of saw shaft destruction .

 Any ideas ?

 Have applied WD 40 to try loossen things up
 
 Thank you
 Ed Meyers 
 Penfield NY