The 2900 to 3300 sfpm is a good ballpark and jives with everything I've seen or heard. I can't believe Suffolk recommended 4500-4800 sfpm for a 14" saw. Those numbers run counter to everything I've ever seen AND their own website.
Snipped from the Suffolk Machinery website
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Examples of optimum Surface Feet Per Minute on vertical band saws running 1/8" to 1" wide blades. It is not considered wise to exceed these values.
WHEEL DIAMETER S.F.P.M. WHEEL DIAMETER S.F.P.M.
12"= 2,800 24"= 4,000
14"= 3,300 26"= 4,000
16"= 3,800 28"= 4,000
18"= 4,000 30"= 4,000
20"= 4,000 36"= 4,000
As you exceed the S.F.P.M. for a specific wheel diameter, you greatly increase the centrifugal force applied to the body of the blade traveling around the two wheels. This causes you to over-tension your blades in order to make them run stable. This WILL cause premature and excessive blade breakage.
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Mike