The method defined in claim 1 wherein the piezo-electric disc is a quartz crystal and wherein the selected anvil material is steel having an initial yield stress in the range from 30,000 to 40,000 p.s.i. The method defined in claim 1 wherein the extreme pressure lubricant is a dry film lubricant with a thermosetting adhesive binder, and wherein the method further comprises the step of setting the binder of the lubricant prior to applying the proof load.Ĩ. The method defined in claim 1 further comprising the step of removing the extreme pressure lubricant after applying the proof load.ħ. The method defined in claim 1 wherein the extreme pressure lubricant is applied with a thickness in the range from 0.001 to 0.003 inch.Ħ. without loss of a lubricating layer between the lubricated surfaces.ĥ. The method defined in claim 1 wherein the extreme pressure lubricant is capable of supporting at least 200,000 p.s.i. ![]() ![]() The method defined in claim 1 wherein the yield stress of the anvil material after plastic deformation is less than 150% of the initial yield stress at the point of maximum plastic deformation.Ĥ. The method defined in claim 1 wherein the initial yield stress of the anvil material is at least 65% of the critical yield stress.ģ. Lubricating the areas of contact between the edge of the disc and the anvils with an extreme pressure lubricant andĪpplying a proof load to the disc through the anvils to cause the anvils to yield and provide seats for the edge of the disc.Ģ. Positioning the disc with opposing segments of its edge adjacent the opposing anvils selected of a material having an initial yield stress at least 50% of the critical yield stress and having a yield stress after plastic deformation less than 200% of the initial yield stress at the point of maximum plastic deformation, the selected anvil material being elastic after plastic deformation ![]() A method of mounting a piezo-electric disc on its edge between two opposing anvils comprising the steps of:
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