STP1327: The Evaluation of Corrosion Resistant Rod End Rolling Element Bearings

    Braza, JF
    Research Engineer and Senior Project Metallurgist, The Torrington Company, Advanced Technology Center, Torrington, CT

    Giuntoli, K
    Senior Product Engineer, The Torrington Company, Torrington, CT

    Imundo, JR
    Research Engineer and Senior Project Metallurgist, The Torrington Company, Advanced Technology Center, Torrington, CT

    Pages: 11    Published: Jan 1998


    Abstract

    Recent developments on carburizing grades of stainless steels [1–3] have provided new materials to produce corrosion resistant airframe control bearings. This paper presents the application of one of these new carburizing grades of stainless steel to rod end ball bearings. The outer ring of the rod end bearing is made out of carburized stainless steel, while the inner ring and balls are made out of through-hardened stainless steel. The stainless steel rod end bearings were evaluated according to various ASTM and Military specifications for performance and corrosion resistance. The stainless steel rod end bearings exceeded the performance requirements of standard rod end bearings (which are comprised of a carburized 8620 steel outer ring and 52100 steel inner ring and balls) in accordance with MIL-8-6039. The rod end bearings were evaluated in the radial fracture load, axial fracture load, and radial dynamic load tests. Also, salt spray and alternate immersion corrosion tests (ASTM B 117-85 and G 44-88, respectively) were conducted on the stainless steel rod end bearings. The stainless steel rod end bearings exhibited superior corrosion resistance to the standard 8620/52100 steel rod end bearings.

    Keywords:

    stainless steel, carburizing, corrosion resistance, Pyrowear® 675 stainless steel, 440C stainless steel, chromium, residual stress, alternate immersion corrosion tests


    Paper ID: STP12145S

    Committee/Subcommittee: A01.10

    DOI: 10.1520/STP12145S


    CrossRef ASTM International is a member of CrossRef.