ISO 3228:2013规定了镶块轴承铸造和压制外壳的边界尺寸和公差，其边界尺寸在ISO 9628中给出。 它适用于普卢默轴承座、法兰轴承座和张紧轴承座。 重新润滑功能的包含是可选的，但如果提供，则它们将与ISO 9628中规定的区域相交，从而使润滑剂从壳体通过该区域令人满意地供给。ISO 3228:2013未涵盖重新润滑功能的精确设计。

ISO 3228:2013 specifies boundary dimensions and tolerances for cast and pressed housings for insert bearings for which boundary dimensions are given in ISO 9628. It applies to plummer block housings, flanged housings and take-up housings. The inclusion of relubrication features is optional, but when provided it is intended that they intersect the zone specified in ISO 9628 in such a way that lubricant satisfactorily feeds from the housing through this zone. The exact design of the relubrication features is not otherwise covered by ISO 3228:2013.