Patent ID: 7942586

Claim:
A thrust needle bearing employing lubricating oil and having a rolling element held by a cage and rolling on a race, wherein the cage has a cage pocket, in which the rolling element is stored to come in contact with a pocket guide face thereof constituted by a shear plane formed through pressing for the cage pocket, the clearance between the pocket guide face of said cage and said rolling element is set to at least 60 μm and at most 130 μm, the value of the arithmetic average roughness Ra of said rolling element coming into contact with the shear plane is set to at least 0.08 μm and at most 0.15 μm, and a ratio of the value of the arithmetic average roughness Ra of the rolling element to the value of the arithmetic average roughness Ra of the pocket guide face is set to 0.2 to 0.375.