Constant velocity joint and method of manufacturing the same

The invention relates to a constant velocity joint and a method of manufacturing the same. Outer ball grooves of an outer joint member of a constant velocity joint each have a first ball groove for allowing a ball to roll therein when the constant velocity joint operates, and a second ball groove having a ball groove radius larger than a ball groove radius of the first ball groove. The second ball groove has a curved line and a connecting line. The curved line is connected to a groove bottom end of the first ball groove located closer to an opening of the outer joint member and is curved radially outward in a concave manner. The connecting line connects the curved line and the opening. The curved line is curved with a curvature center that is located closer to the opening than the groove bottom end of the first ball groove and that is located radially inside the outer joint member. 本发明提供种等速万向节及其制造方法。等速万向节具备的外侧万向节构件的外侧滚珠槽具备：在等速万向节工作时使滚珠滚动的第滚珠槽；以比第滚珠槽的滚珠槽半径大的滚珠槽半径形成的第二滚珠槽。第二滚珠槽具备：与第滚珠槽的槽底的开口部侧的槽底端部连接，并朝向径向外侧呈凹状