最近,有读者来信来电要求《国标选介》栏目介绍滚动轴承的代号。我们查了一下,目前使用的应当是1993年7月28日发布、1994年7月1日实施的新国家标准《GB/T 272-93滚动轴承代号方法》,这个新标准对旧标准作了很多修改。我们看了之后,感到学习这个新标准不仅对不了解滚动轴承代号的人很有必要,对那些熟悉旧代号的人似乎更有必要。因为后者不仅要了解新的代号,还要了解新旧代号的对照,否则一不小心就会弄错。因此,尽管该标准内容很多,篇幅很大,我们仍决定摘要分期加以刊登。 Recently, some readers asked for a letter calling for the introduction of “national standard selection,” the introduction of rolling bearing code. We checked, the current use should be July 27, 1993, July 1, 1994 implementation of the new national standard “GB / T 272-93 rolling bearing code method”, this new standard made a lot of the old standard modify. When we looked, we felt that learning the new standard was necessary not only for those who did not know the code of the rolling bearing, but also for those familiar with the old code. Because the latter not only to understand the new code, but also understand the old and new code comparison, or accidentally mistakes. Therefore, despite the large amount of content and length of the standard, we still decided to publish the summary in installments.