ISO 12240的本部分规定了各种尺寸系列的球面滑动轴承杆端的尺寸、公差和径向内部间隙。 选择ISO 12240本部分中规定的尺寸和公差是为了允许设计和使用球面滑动轴承杆端，该杆端包括具有各种滑动材料组合的径向球面滑动轴承。 规定的公差值适用于任何涂层、电镀、环分裂或断裂之前的成品球面滑动轴承杆端。 球面滑动轴承杆端无需符合图示设计，但需要符合规定的尺寸、公差和径向内部间隙。 注:用于机身应用的球面滑动轴承杆端和用于直接连接液压缸的特定球面滑动轴承杆端不在ISO 12240的本部分范围内。

This part of ISO 12240 specifies dimensions, tolerances and radial internal clearances for various dimension series of spherical plain bearing rod ends. The dimensions and tolerances specified in this part of ISO 12240 have been selected to permit the design and use of spherical plain bearing rod ends which incorporate radial spherical plain bearings having various sliding material combinations. The specified tolerance values apply for finished spherical plain bearing rod ends before any coating, plating, ring splitting or fracturing. Spherical plain bearing rod ends need not conform to the designs illustrated but compliance is required as regards dimensions, tolerances and radial internal clearances specified. NOTE — Spherical plain bearing rod ends for airframe applications and specific spherical plain baring rod ends for direct connection to hydraulic cylinders are not covered by this part of ISO 12240.