DIN 984 Internal Spring Retaining Ring with Lugs for Bores

DIN 984 covers spring-type retaining rings with internal lugs. Such rings are used in mechanical engineering to secure components on a shaft — to increase the reliability of the assembly. Grooves are made in the bore for installing the ring; the design is intended for quick assembly.

The ring has 4 lugs that prevent components from shifting on the shaft and the connection from loosening spontaneously.

Manufacturing features and characteristics

Material: spring steel, plain, with zinc or oxide coating for corrosion protection, as well as A2 and A4 stainless steel. Product characteristics:

• Internal bore size — from 16 to 100 mm.
• Ring thickness — from 1 to 3 mm.
• Ring outer diameter — from 17.3 to 105.5 mm.

Product applications

Retaining rings are used in mechanical engineering: instrument manufacturing, assembly of machine tools and equipment. They are also used in assembling moving shaft components in the automotive industry, production of special equipment, and other fields of industry. Using these rings increases the reliability of assembly units and components.

Dimensions of DIN 984 spring internal retaining rings for bores, mm

d3	a max.	b	d5 min.	s
18.3	3.7	2.2	1.7	1.0
19.5	3.8	2.3	2.0	1.0
20.5	3.8	2.3	2.0	1.0
21.5	3.9	2.4	2.0	1.0
23.5	4.0	2.6	2.0	1.0
25.9	4.2	2.6	2.0	1.2
28.5	4.4	2.8	2.0	1.2
29.1	4.5	2.9	2.0	1.2
32.1	4.9	3.2	2.0	1.2
34.4	5.1	3.3	2.5	1.2
36.5	5.3	3.4	2.5	1.5
37.8	5.5	3.6	2.5	1.5
38.8	5.6	3.6	2.5	1.5
40.5	6.1	3.8	2.5	1.5
43.5	7.2	4.0	2.5	1.75
45.5	7.2	4.1	2.5	1.75
48.5	7.2	4.3	2.5	1.75
50.5	7.2	4.5	2.5	1.75
54.2	8.2	4.7	2.5	2.0
56.2	8.2	4.7	2.5	2.0
61.2	8.2	5.2	2.5	2.0
79.5	10.2	6.6	3.0	2.5