1.1本规范涵盖主要由元素铜、锡和石墨粉末制成的烧结青铜、油浸轴承。制造商可自行决定在混合物中使用预合金青铜粉末。 1.2本规范涵盖以下变量: 1.2.1等级可分为四个青铜基成分等级，由不同的石墨含量确定。 1.2.2类型等级1和2有四种类型，由比密度范围描述。 1.3除非印刷品另有规定，否则根据本规范订购的轴承通常在烧结后确定尺寸，并将浸渍润滑油。 1.4以英寸-磅或国际单位制表示的数值应单独视为标准值。在文本中，国际单位显示在括号中。每个系统中规定的值不是精确的等价物；因此，每个系统应相互独立使用。合并两个系统的值可能会导致不符合规范。

1.1 This specification covers sintered bronze, oil-impregnated bearings made primarily from elemental copper, tin, and graphite powders. The manufacturer may, at his discretion, use prealloyed bronze powder in the blend. 1.2 This specification covers the following variables: 1.2.1 GradesAvailable in four bronze base composition grades identifiable by different graphite contents. 1.2.2 TypeGrades 1 and 2 are available in four types described by specific density ranges. 1.3 Bearings ordered to this specification will normally be sized after sintering and will be impregnated with a lubricating oil unless otherwise specified by print. 1.4 The values stated in either inch-pound or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the specification.