GOST 13942-86 Flat Spring Retaining Rings

GOST 13942-86 covers flat external eccentric spring retaining rings of product grades A, B and C and their grooves. The rings are designed to secure rolling bearings and other parts against axial displacement on shafts with diameters from 4 to 200 mm.

The design and dimensions of the rings and their grooves shall comply with those shown in the drawing and table.

Dimensions, mm

Nominal ring diameter (shaft diameter) d	Ring												Groove				Permissible axial load,* kN
	d₂		d₃	d₄	s	b	a, max	l	r₂ max	r₁	D, min	e	d₁		m H13	h, min
	Nom.	Limit deviation											Nom.	Limit deviation
4	3.5	+0.075 -0.15	4.96	1	0.4	0.9	2.2	-	-	1.6	8.8	0.17	3.6	-0.075	0.5	0.6	0.60
5	4.5		6.16		0.6	1.1	2.5				10.7	0.27	4.6		0.7		0.75
6	5.4		7.34	1.15	0.7	1.3	2.7			1.8	12.2	0.33	5.6		0.8		0.90
7	6.4	+0.09 -0.18	8.54	1.2	0.8	1.4	3.1			2.0	13.8		6.6	-0.09	0.9		1.06
8	7.2		9.3		1.0	1.5	3.2				15.2	0.45	7.5		1.2	0.75	1.52
9	8.2		10.6			1.7	3.3				16.4	0.5	8.5				1.68
10	9.2	+0.15 -0.30	11.8	1.5		1.8		2.0	1.0	1.5	17.6		9.5				1.96
11	10.2	+0.18 -0.36	12.8					3.0		2.0	18.6		10.5	-0.11		1.1	2.77
12	11.0		13.6	1.7							19.6		11.3				3.39
13	11.9		14.7			2.0	3.4				20.8	0.6	12.2			1.2	3.96
14	12.9		15.9			2.1	3.5				22.0		13.2				4.27
15	13.8		17.0			2.2	3.6				23.2		14.1			1.4	5.13
16	14.7		17.9		1.2		3.7			2.5	24.4		15.0			1.5	6.08
17	15.7		19.1			2.3	3.8				25.6		16.0		1.4		6.47
18	16.5		19.9	2.0		2.4	3.9				26.8	0.7	16.8			1.8	8.15
19	17.5		21.1			2.5					27.8		17.8				8.66
20	18.2	+0.21 -0.42	21.8			2.6	4.0			3.0	29.0	0.8	18.6	-0.21		2.1	10.6
22	20.2		24.2			2.8	4.2				31.4		20.6				11.7
23	21.2		25.3			2.9	4.3				32.4		21.5			2.3	12.7
24	22.1		26.3			3.0	4.4				33.8	0.9	22.5				13.7
25	23.1		27.3								34.8		23.5				14.2
26	24.0		28.2			3.1	4.5				36.0	1.0	24.5				14.9
28	25.8		30.2			3.2	4.7				38.4		26.5				16.0
29	26.8		31.6			3.4	4.8				39.6		27.5				16.7
30	27.8		32.8			3.5	5.0				41.0		28.5				17.1
32	29.5		34.5	2.5		3.6	5.2		2.0		43.4	1.1	30.2	-0.25		2.7	22.0
34	31.4	+0.25 -0.50	36.8			3.8	5.4				45.8		32.0				22.3
35	32.2		37.6		1.7	3.9	5.6	5.0			47.2	1.2	33.0		1.9	3.0	26.7
36	33.0		38.6			4.0					48.2		34.0				27.4
37	34.0		39.8			4.1	5.7				49.2		35.0				28.2
38	35.0		40.6			4.2	5.8				50.6	1.4	36.0				29.0
40	36.5	+0.39 -0.78	42.5			4.4	6.0				53.0		37.5			3.8	39.0
42	38.5		44.7			4.5	6.5				56.0		39.5				40.0
45	41.5		48.1			4.7	6.7				59.4		42.5				42.9
46	42.5		49.3			4.8	6.8				61.4		43.5				43.9
48	44.5		51.7			5.0	6.9				62.8		45.5				45.7
50	45.8		53.0		2.0	5.1	6.9			4.0	64.8	1.5	47.0		2.2	4.5	57.0
52	47.8		55.2			5.2	7.0				67.0		49.0				59.4
54	49.8		57.4			5.3	7.0	6.0			68.0		51.0	-0.30			61.7
55	50.8	+0.46 -0.92	58.6			5.4	7.2				70.4		52.0				62.9
56	51.8		59.8			5.5	7.3				71.6		53.0				64.0
58	53.8		61.6			5.6					73.6	1.7	55.0				66.4
60	55.8		64.0			5.8	7.4				75.8		57.0				68.8
62	57.8		66.4			6.0	7.5				78.0		59.0				71.1
65	60.8		70.0	3.0	2.5	6.3	7.8				81.6		62.0		2.8		74.7
68	63.6		73.2			6.5	8.0				85.0		65.0				78.2
70	65.6		75.4			6.6	8.1				87.2		67.0				80.6
72	67.6		77.8			6.8	8.2				89.4		69.0				82.9
75	70.6		80.6			7.0	8.4				92.8	2.0	72.0				86.4
78	73.5		84.1			7.3	8.6				96.2		75.0				90.0
80	75.0		85.8			7.4					98.2		76.5			5.3	107
82	77.0		88.2			7.6	8.7				101.0		78.5				109
85	79.5		91.1	3.5		7.8					104.0		81.5	-0.35			114
88	82.5	+0.54 -1.08	94.5		3.0	8.0	8.8				107.0	2.0	84.5		3.4	5.3	118
90	84.5		96.5			8.2					109.0	2.2	86.5				121
92	86.5		98.7			8.3					110.0		88.5				124
95	89.5		102.3			8.6	9.4				115.0		91.5				128
98	92.5		105.9			8.9	9.5				120.0		94.5				132
100	94.5		108.1			9.0	9.6	8.0	3.0		121.0		96.5				135
102	95.0		108.2			9.1	9.7				126.0	2.5	97.0	-0.54		7.5	195
105	98.0		111.6			9.3	9.9				128.0		100.0				204
108	101.0		114.8			9.4	10.0				129.0		103.0				207
110	103.0		117.2			9.6	10.1				132.0		105.0				211
112	105.0		119.4			9.7	10.2				133.0		107.0				215
115	108.0		122.6			9.8	10.6				138.0		110.0				221
120	113.0		128.4			10.2	11.0				143.0		115.0				223
125	118.0		133.2	4.0		10.4	11.4			5.0	149.0	2.8	120.0	-0.63			240
130	122.5	+0.63 -1.26	138.3			10.7	11.6				155.0		125.0				250
135	127.5		143.9			11.0	11.8				160.0		130.0				260
140	132.5		149.3			11.2	12.0				165.0		135.0				270
145	137.5		154.9			11.5	12.2				171.0		140.0				280
150	142.5		160.5			11.8	13.0				177.0	2.8	145.0				289
155	147.5		165.3			12.0					182.0	3.1	150.0				299
160	152.5		170.7			12.2	13.3				188.0		155.0				308
165	157.0		175.8			12.5	13.5				193.0		160.0				318
170	162.0		181.6			12.9	-		-	-	197.0		165.0				328
175	167.0		186.6								202.0		170.0				338
180	172.0		192.8			13.5					208.0		175.0				347
185	177.0		197.8								213.0		180.0				358
190	182.0	+0.72 -1.44	203.8			14.0					219.0		185.0	-0.72			368
200	192.0		213.8								229.0		195.0				387

Notes:

1. Dimensions d₃, b, l, and r₁ may be adjusted during ring manufacture.

2. For products designed before 01.01.88, rings with dimension a larger than specified in the table may be used, provided this does not affect the assembly of the product.

3. The axial load is determined for the following conditions:

a) the working edges of the ring are sharp;

b) the corners at the base and the outer edge of the groove have no rounding or chamfer;

c) the retained part is fitted on the shaft without clearance;

d) the surface of the retained part adjoining the ring has no rounding or chamfer;

e) the tensile strength of the shaft material is not less than 300 N/cm².

Example of designation for a flat external eccentric spring retaining ring of product grade A with a nominal diameter of 30 mm, made of steel grade 65G, uncoated:

Ring A30 GOST 13942-86

Same for product grade B, made of steel grade 60S2A with a 6 μm cadmium coating, chromated:

Ring B30.60S2A.Cd6.chr GOST 13942-86

Technical requirements — per GOST 13944-86.

Theoretical mass of rings is given in the reference appendix.

MASS OF STEEL RINGS

Nominal ring diameter, mm	Theoretical mass of 1000 rings, kg
4	0.021
5	0.066
6	0.107
7	0.140
8	0.440
9	0.460
10	0.490
11	0.510
12	0.520
13	0.550
14	0.600
15	0.639
16	1.043
17	1.058
18	1.117
19	1.447
20	1.665
22	1.885
23	2.000
24	2.004
25	2.684
26	2.782
28	2.892
29	2.992
30	3.102
32	3.342
34	3.552
35	6.300
36	6.563
37	6.763
38	6.963
40	7.267
42	7.564
45	8.067
46	8.367
48	8.767
50	12.994
52	13.494
54	13.794
55	14.294
56	14.594
58	15.094
60	15.494
62	15.994
65	20.445
68	25.883
70	26.683
72	27.483
75	28.614
78	31.914
80	34.914
82	36.214
85	37.114
88	38.414
90	47.615
92	48.007
95	49.607
98	50.207
100	50.671
102	55.071
105	66.871
108	68.671
110	70.071
112	71.271
115	73.280
120	76.570
125	79.825
130	92.325
135	95.925
140	101.925
145	103.025
150	106.675
155	110.075
160	113.675
165	117.175
170	120.875
175	124.374
180	127.870
185	131.570
190	134.960
200	142.070

Corresponds to DIN 471.