1938-01-01

Surface Finish Related to Wear in Internal-Combustion Engines 380155

UNTIL recently factual investigation of wear, lubrication, and maintenance of operating tolerances in internal-combustion engines have been handicapped by the lack of factory-type equipment which would permit standardized measurement in all conditions of manufacture and service. The combined characteristics of surface character and finish in bearing and operating parts may now be determined practically and efficiently by means of the new portable Profilometer, combined with photographic or microscopic study.
Newly developed honing tools and new tool actuations now accomplish a large amount of stock removal rapidly by the hone abrading process. These new tools remove all stock which has been deformed or disturbed in previous processing under conditions of actuation which produce increased accuracy, controlled surface character, and final surface finish in which roughness is held within one or two micro-inches in some parts. In present installations, they have permitted reductions in the total number of processing operations, increased production, and effected other substantial economies in processing.
The adoption of this combined new equipment indicates new opportunities for expansion of existing investigating technique; promises greater correlation of factual data on the causes of wear, and increased efficiency in production processing.

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