I'm in the process of making a slab saw with either an 18 or 20" blade. I know the rated RPM for an 18" blade is anywhere from 600-1200, and a 20" is 550-1100, but here's where I get lost...I have about a dozen motors in a variety of sizes, but I don't understand enough about them to know which motor would work best for my needs...ARGHHH!! ]These are my options...

Rockwell 1/2 hp, 1725 rpm, 115 v, 9.8 amps

Leeson 1/3 hp, 1725/1425 rpm, 208/230 v, 1.5/2 FLA (amps?)

Master 1/2 hp, 3450 rpm, 115/230 v, 7 amps

Baldor 1/2 hp, 3450 rpm, 115/230 v

Century 1/2 hp, 1725 rpm, 115/230 v, 7 amps

B Bearing 1 1/4 hp, 3450 rpm, 115 v, 14 amps

Craftsman 1 hp, 3450 rpm, 115 v, 14.0 amps

A. O. Smith 3/4 hp, 1725 rpm, 230 v, 5.1 amps

A. O. Smith 3/4 hp, 1725 rpm, 115/230 v, 10.5/5.2 amps

Dayton 1/3 hp, 1725 rpm, 115 v, 5.9 amps

G. E. 1/2 hp 1725 rpm, 110/220 v

1/2 hp, 860 rpm, 110 v

Any advice as to which motor would be the one to use would be GREATLY APPRECIATED!!

Thanx!