Yes they can. I have used a Sears two blade wobble on my saw for years. When doing pressure treated lumber, I use the $19.99 cheapie from Harbor Freight. I have also used my Freud SD-208, and my Forrest Dado King on my radial saw. Most dado blades feature a negative hook angle (to prevent chip out) on the outside cutters. This is what you want on a radial arm saw. Just be aware that because you are removing a lot of material, dados have a tendency to self feed. Make sure your left hand is out of the way and you have a firm grip with right hand, as you will be both pulling, while resisting the blades desire to self feed. Did you check with the Lowes in RR to see if they still had the Biese fences in stock.