| 摘要 |
PROBLEM TO BE SOLVED: To improve the sliding property while excellent fluidity is secured by providing the wear resistant resin composition to be used in forming a cage for bearing with a base material made of the resin to be selected from among polyamide resin and polyacetal resin and with a reinforcement in which Aramid fiber of the prescribed quantity. SOLUTION: The resin to be selected from among polyamide resin and polyacetal resin as the base material, and the reinforcement in which 1-30wt.% Aramid fiber is blended are the resin composition to be used for a cage for bearing in a roller bearing of the inner diameter of about 5mm. Polyethylene of an ultra-high polymer of 5-30wt.% is blended as the filler for improving the sliding property. Alternatively, as the filler for improving the sliding property, 5-30wt.% micro-spherical phenol resin is blended. The Aramid fiber as the reinforcement of 10-15μm, preferably <=12μm in fiber diameter, and 0.5-3.5mm in length, preferably >=0.7mm in lower limit to <=1.5mm in upper limit, is used.
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