For all those using a hacksaw....
If you reverse the blade and make it into a pull saw, you will find the cuts are straighter. When you push a a thin blade with no backer spline, like a hacksaw as you normally would, the blade will bow out from the forces applied and those which are resisting. When you reverse the blade and pull it, the blade will always straighten out from the tension, like a rope under tension. Pushing on a rope is rather futile.... just sayin'
Hacksaw blades come in many tooth configurations as well, some are best for cutting very thin metal, other are best at thicker stock,like the 14 TPI, which is what you would want to use.
The answer to your question will only be as detailed and specific as the question is detailed and specific. Good questions also include a sketch or a photo that illustrates your issue. (:< D)
Last edited by woodnthings; 04-05-2015 at 05:15 PM.