挡圈又称卡簧，分为孔用挡圈和轴用挡圈，起轴向限位作用，可以防止其他零件轴向窜动。成型工艺多采用板材冲切，功能截面呈锥形，装配后多为"线性接触"部分大规格型号采用线材缠绕成型，冲切多余材料的工艺制成，截面呈规则矩形，装配后为"面接触"。
与挡圈有关的现行国家标准
1 GB/T滚动轴承单列圆柱滚子轴承平挡圈和套圈无挡边端倒角尺寸 Rolling bearings ― Single-row cylindrical rollerbearings ― Chamferdimensions for loose rib and non-rib sides实施
2 GB/T锥销锁紧挡圈 Lock rings with cone pin实施,代替GB
3 GB/T螺钉锁紧挡圈 Lock ring with screw实施,代替GB
4 GB/T带锁圈的螺钉锁紧挡圈 Lock rings with screw and circlip实施,代替GB
5 GB/T轴肩挡圈 Ringsfor shoulder实施,代替GB
6 GB/T螺钉紧固轴端挡圈 Lock rings at the end of shaft with screw实施,代替GB
7 GB/T螺栓紧固轴端挡圈 Lock rings at the end of shaft with bolt实施,代替GB
8 GB/T孔用弹性挡圈 Circlips for holes实施,代替GBGB
10 GB/T轴用弹性挡圈 Circlipsfor shaft实施,代替GBGB
12 GB/T孔用钢丝挡圈 Roundwire snap rings for hole实施,代替GB
13 GB/T轴用钢丝挡圈 Roundwire snap rings for shaft实施,代替GB
14 GB/T开口挡圈 "E" rings实施,代替GB
15 GB/T滚动轴承圆柱滚子轴承可分离斜挡圈外形尺寸 Rolling bearings -Cylindrical roller bearings,separate thrust collars - Boundary dimensions
16 GB/T挡圈技术条件弹性挡圈 Specifications forring--Circlips实施,代替GB
17 GB/T挡圈技术条件钢丝挡圈 Specifications forring--Round wire snap rings实施
18 GB/T挡圈技术条件切制挡圈 Specifications forring--Cutting rings实施
19 GB/T夹紧挡圈 Griprings实施,代替GB
20 GB/T滚动轴承圆柱滚子轴承平挡圈和套圈无挡边端倒角尺寸 Rolling bearings -Single-row cylindrical roller bearings - Chamfer dimensions for loose rib andnon-rib sides 2012年第24号公告
