Profile: Glyne Mfg. Co. provides rotary swaging, tube butting, and end forming. Our swaging is a process for reducing diameter of a length of tubing. Our tube butting creates a tube with a varying wall thickness while maintaining a constant outside diameter. Our tube end forming includes expanding, flaring, beating and flanging. We also offer honing, single hole punching, drilling, limited machining and non-aircraft aluminum heat treating.