DIN 983 Retaining Ring with Lugs for Shafts

DIN 983 is an external retaining ring with lugs on the outer side. The part is designed for mounting on a shaft, fits into prepared grooves, and provides reliable fixation of the assembly.

Four steel lugs on the outer side fix the position of the ring, prevent displacement of the component, and increase the reliability of the connection. Fasteners of this type are used in mechanical engineering: retaining rings are used across various industries to prevent breakdowns of assemblies and units.

Manufacturing features

Rings of this type are made of spring steel — a material with increased flexibility and ductility, resistant to constant dynamic loads. The metal may be coated with a protective finish applied by phosphating or oxidizing. The coating increases corrosion resistance and extends the service life of the product.

The retaining ring has the following characteristics:

• The internal diameter of the product ranges from 15.7 to 60.8 mm.
• The thickness of the retaining ring can vary from 1 to 2.5 mm.
• The maximum width of the ring is from 2.5 to 5 mm.
• The overall diameter of the product, including the lugs, is from 28 to 67 mm.

Application options

Rings with external lugs are used to secure components on a shaft across various branches of mechanical engineering: automotive manufacturing, machine tool building, instrument making, production of special-purpose vehicles, and others. The material withstands heavy loads and ensures long-term service life of the product.

Dimensions of DIN 983 external spring retaining rings for shafts, in mm

d3	a max.	b	d5 min.	s
15.7	3.6	2.4	1.7	1.0
16.5	3.7	2.5	2.0	1.2
18.5	3.8	2.6	2.0	1.2
20.5	4.0	2.8	2.0	1.2
23.2	4.3	3.0	2.0	1.2
24.2	4.4	3.1	2.0	1.2
27.9	4.7	3.4	2.0	1.5
29.6	5.0	3.6	2.5	1.5
32.2	5.2	3.8	2.5	1.5
36.5	7.2	4.2	2.5	1.75
41.5	7.2	4.6	2.5	1.75
45.8	8.2	5.0	2.5	2.0
50.8	8.2	5.4	2.5	2.0
60.8	10.2	6.2	3.0	2.5

d	s	d₃	a	b	d₅	d₂	m	n	d₄
20	1.2	18.5	3.8	2.6	2	19	1.3	1.5	28
25	1.2	23.2	4.3	3	2	23.9	1.3	1.7	34
30	1.5	27.9	4.7	3.4	2	28.6	1.6	2.1	39.9
35	1.5	32.2	5.2	3.8	2.5	33	1.6	3	45.9
40	1.75	36.5	7.2	4.2	2.5	37.5	1.85	3.8	55.1
45	1.75	41.5	7.2	4.6	2.5	42.5	1.85	3.8	60.1
50	2	45.8	8.2	5	2.5	47	2.15	4.5	67.2