Originally Posted by
John TenEyck
From my observations side guides are of almost no importance on a bandsaw that can adequately tension a wider blade (1" or more. Maybe 3/4", too, but I've never used one.) that is set up to cut straight. On saws that can only tension a 1/2" blade, but still put adequate tension on it, then guides start to become important. With saws that can't apply enough tension, like my 14" Delta, guides indeed are critical to getting straight cuts.
What's adequate tension. 20 ksi, minimum, and 25 ksi is better. My Delta can barely muster 12 ksi on a 1/2" blade. My larger Grizzly has no trouble applying 25 ksi on a 1" blade.
Saws that are robust enough to put 25 ksi on a 1" blade make resawing so much easier, almost trivial.
John