Published: Jan 1937
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In the textile industry, as in other industries employing machinery, the wear of mechanical elements arises through the relative motion of metallic parts that are in contact with each other, or with some other substance. This relative motion occurs in a number of forms, depending on the design and the particular function of the parts that are involved. For the purposes of this discussion, the typical functions of machine elements can be classified under the following types of movement: 1. Sliding.—This may be rectilinear or curvilinear in nature. If the latter, it may be either the result of rotation or oscillation. 2. Rolling.—Here one part rolls on another, as in the case where a cam roll runs on a cam. 3. Impact.—Two parts strike together, either continuously or intermittently. Examples of this type of motion are found in weaving machinery. Although these various types of motion exist individually, wear usually is the result of a combination of them, introduced not only through the normal operation of the machine, but also through the vibration which is the result of that operation.
Assistant to General Manager, Crompton & Knowles Loom Works, Worcester, Mass.