【課題】摺動部の摩擦抵抗の低減と、耐焼付き性および長期に亘る潤滑寿命の維持とを両立できると共に、低温環境下におけるフレッティングの発生を低減できるグリース組成物およびこれを備える車両用転動装置を提供すること。 【解決手段】ポリαオレフィンからなり、40℃における動粘度20〜60mm 2 /sである基油と、脂環式アミンおよび芳香族アミンの混合アミンと、ジイソシアネート化合物とを反応させて得られるウレア系化合物を含む増ちょう剤と、亜リン酸エステル、エーテル系化合物および酸化パラフィンを含む添加剤とを含有するグリース(G)が潤滑剤として封入されたハブユニット1を提供する。 【選択図】図1
PROBLEM TO BE SOLVED: To provide a grease composition that reduces friction resistance of a sliding part, achieves both baking resistance and retention of lubrication life over a long period of time and can reduce the occurrence of fretting under low-temperature environment and to provide a rolling device for a vehicle that comprises the grease composition.SOLUTION: A hub unit 1 is provided, which is filled with a grease (G) as a lubricant containing a base oil comprising polyαolefin and having a kinematic viscosity at 40°C of 20 to 60 mm/s, a thickening agent including a urea-based compound produced by reacting a mixed amine of an alicyclic amine and an aromatic amine with a diisocyanate compound, and an additive including a phosphorous ester, an ether compound and oxidized paraffin.SELECTED DRAWING: Figure 1




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