ABSTRACT
Designers, engineers, and machinists can now eliminate the problem on stationary fits by using machinery adhesives. In contrast to structural adhesives, which are used as the primary holding means in a structure (often in direct tension), machinery adhesives are generally used in rigid cylindrical assemblies in a shear or compressive mode to eliminate leakage and provide a noncreeping joint. Modern chemistry and engineering have refined the formulations so that many parameters of organic machinery adhesive can be controlled, including viscosity, lubricity, cure speed, shear strength, modulus, ultimate strength, impact resistance, and chemical resistance, as well as minor characteristics such as color and fluorescence. Dry zinc phosphate, which is used extensively for paint adhesion, is a good base for machinery adhesives and gives the highest shear stress values of all the common bolt surfaces. All of the machinery adhesives are anaerobic, which means they are stabilized by oxygen in the air.
