A lubricant, comprising: a base oil as primary lubricant component, and a naphthenate salt as additive (A), and an alkylimidazole compound as additive (B), added to the base oil, preferably further comprising an aliphatic amine compound as additive (C), a fluid dynamic bearing with the lubricant filled therein, a spindle motor with the fluid dynamic bearing installed therein, and a magnetic disk device with the spindle motor installed therein.
一种润滑剂,包括:作为主要润滑剂成分的基础油,以及添加到基础油中的作为添加剂(A)的
环烷酸盐和作为添加剂(B)的烷基
咪唑化合物,最好还包括作为添加剂(C)的脂肪族胺化合物、填充有润滑剂的流体动力轴承、安装有流体动力轴承的主轴电机和安装有主轴电机的磁盘装置。