What is the recommended blade size and specifications for this radial arm saw?

Use a 10 inch diameter blade with a 5/8 inch arbor hole. The manual recommends the Craftsman 40-tooth, 10 inch carbide-tipped blade that comes with the saw. Use only blades rated for at least 5,000 rpm and marked as suitable for this saw. Check with your nearest Sears retail store for other recommended blade options. (Page 19)