Applicabmaty of surfaoe modi 五cabon proeess re1 且 わ ed with sur 鉛oe pla8tic de 丘)mation such as a shot pee 血 g and a roller burnis g tr 〕 improve fatigue properties of roller bea 血 1gs . Commercial grade bea血 g raceway was used for the expe 血 ent . The residual stre8s and the hardnes8 曲 t血bution of the spec 洫 en was measured with an x ・ ray d 丗 ac缸on and micro Vickers 血 dentation . 1Crhe hardness distribubion of the shot peened and burnished spec 血 en was high and bmad . The residual stress

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... ribution of the shot peened and bumished spec 血 en showed 8i皿 iar tendenqy With that of the hardness and was anisotmpic depending on the bumishj皿 g direction . Roni皿 g oontact fatigue was evaluated with a developed apparatus using s 丗 oon nitride ball8 as m 皿血 g element . It iS f ( ) und that the st 肥 ss distribu 虹on after the fatigue exper 血 ent is conSiderably different fbOm those of the initial stage . Key Mords:ball bearing , shot peening , rollcr burnishing , residual stress, Vickers hardness, roSling contact fatigue 1. 緒 言