GOST 13943-86 Spring Flat Retaining Rings

Spring flat internal eccentric retaining rings and grooves for them, made to GOST 13943-86, are designed to secure rolling bearings and other parts against axial displacement in bores with a diameter from 8 to 320 mm. The standard establishes rings of product grades A, B and C.

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 (bore diameter) d	Ring												Groove				Permissible axial load,* kN
	d₂		d₃	d₄	s	b	a, max	l	r₂ max	r₁	D, max	e	d₁		m H13	h₁, min
	Nom.	Limit deviation											Nom.	Limit deviation
8	8.8	+0.36 -0.18	7.2	1.0	0.8	1.1	2.4	3.0	1.0	1.2	2.8	0.3	8.5	+0.09	0.9	0.75	1.68
9	9.8		7.9			1.3	2.5	3.5			3.5	0.35	9.5				1.76
10	10.8		8.9	1.5	1.0	1.4	3.2			1.6	3.1	0.45	10.5	+0.11	1.2	0.75	1.96
11	11.8		9.8			1.5	3.3	4.0			3.9	0.5	11.5				2.17
12	13.0		10.6			1.7	3.4			1.7	4.7		12.7			1.1	3.33
13	14.1		11.5			1.8	3.6			1.8	5.3		13.8			1.2	4.11
14	15.1		12.3	1.7		1.9	3.7	4.5			6.0		14.8				4.32
15	16.2		13.2			2.0					7.0		15.9			1.4	5.30
16	17.3		14.3				3.8	5.0		1.9	7.7		17.0			1.5	6.46
17	18.4	+0.42 -0.21	15.2			2.1	3.9				8.4		18.0				6.86
18	19.6		16.2	2.0		2.2	4.1	6.0		2.0	8.9		19.2	+0.21		1.8	7.86
19	20.6		17.4								9.8	0.6	20.2				9.20
20	21.8		18.4			2.3	4.2		2.0	2.5	10.6		21.4			2.1	11.0
21	22.8		19.2			2.4					11.6		22.4				11.8
22	23.8		20.2			2.5					12.6	0.7	23.4				12.7
23	24.9		21.3		1.2			7.0			13.6		24.5		1.4	2.3	13.7
24	25.9		22.1			2.6	4.4				14.2		25.5				14.5
25	26.9		23.1			2.7	4.5				15.0	0.8	26.5				14.7
26	28.0		24.0			2.8	4.7			3.0	15.6		27.5				15.5
28	30.2	+0.50 -0.25	26.0			2.9	4.8	8.0			17.4		29.5				17.2
29	31.2		27.2								18.4	0.9	30.5	+0.25			17.6
30	32.2		28.0			3.0					19.4		31.5				18.0
32	34.5		29.9	2.5		3.2	5.4	9.0		3.5	20.2		33.8			2.7	23.5
34	36.5		31.7			3.3					22.2		35.8				23.5
35	37.8		32.8			3.4		10.0			23.2		37.0			3.0	28.2
36	38.8		33.8			3.5					24.2	1.0	38.0				29.0
37	39.8		34.6			3.6	5.5				25.0		39.0				29.8
38	40.8		35.4			3.7					26.0		40.0				31.6
40	43.5	+0.78 -0.39	37.7		1.7	3.9	5.8	12.0		4.5	27.4		42.5		1.9	3.8	40.4
42	45.5		39.3			4.1	5.9				29.2		44.5				43.0
45	48.5		42.1			4.2	6.2	14.0		5.0	31.6		47.5				45.2
46	49.5		43.1			4.3	6.3				32.2	1.1	48.5				46.0
47	50.6	+0.92 -0.46	44.0			4.4	6.4				33.2		49.5				47.2
48	51.6		44.8			4.5					34.6		50.5	+0.30			48.2
50	54.2		47.2			4.6	6.5				36.0		53.0			4.5	60.7
52	56.2		49.4			4.7	6.7	16.0		5.5	37.6	1.3	55.0			4.5	62.9
54	58.2		51.2			4.8					39.6		57.0				64.7
55	59.2		51.8			5.0	6.8				40.4		58.0				66.4
56	60.2		52.6			5.1					41.4		59.0				67.5
58	62.2		54.4			5.2	6.9			6.0	43.2		61.0				69.6
60	64.2		56.0			5.4	7.3				44.4		63.0				72.5
62	66.2		57.8			5.5					46.4		65.0				74.7
65	69.2		60.2	3.0		5.8	7.6				48.8		68.0				78.2
68	72.5		62.9			6.1	7.8				51.4		71.0				81.7
70	74.5		65.1			6.2					53.4	1.5	73.0				84.2
72	76.5		66.7			6.4		18.0			55.4		75.0				86.1
75	79.5		69.3			6.6					58.4		78.0				90.0
78	82.5	+1.08 -0.54	71.9		2.0	6.8	8.5			6.5	60.0		81.0	+0.35	2.2		93.5
80	85.5		74.5			7.0					62.0		83.5			5.3	112
82	87.5		76.5								64.0		85.5				115
85	90.5		79.1	3.5		7.2	8.6	20.0		7.0	66.8		88.5				119
88	93.5		81.7			7.4					69.8		91.5				123
90	95.5		83.9			7.6					71.8	1.8	93.5				126
92	97.5		85.5			7.8	8.7				73.6		95.5				129
95	100.5		87.9			8.1	8.8			7.5	76.4		98.5				133
98	103.5		90.5			8.3	9.0				79.0		101.5				137
100	105.5		92.3			8.4					81.0		103.5				139
102	108.0		94.6		2.5	8.5	9.2	22.0			82.6		106.0	+0.54	2.8	6.0	163
105	111.0		97.2			8.7					85.6		109.0				168
108	114.0		99.8			8.9	9.5				88.0		112.0				173
110	116.0		102.2			9.0	10.4			8.5	88.2	2.1	114.0				176
112	118.0		104.0			9.1	10.5				90.0		116.0				179
115	121.5	+1.26 -0.63	107.1			9.3					93.0		119.0				183
120	126.5		111.3	4.0		9.7	11.0				97.0		124.0	+0.63			191
125	131.5		116.3			10.0					102.0	2.4	129.0				197
130	136.5		120.9			10.2		24.0			107.0		134.0				207
135	141.5		125.3			10.5	11.2			10.0	112.0		139.0				214
140	146.5		129.9			10.7					117.0		144.0				222
145	151.5		134.5			10.9	11.4	24.0	2.0		122.0	2.4	149.0		2.8	6.0	230
150	157.5		140.5		3.0	11.2	12.0	28.0	3.0		125.0	2.7	155.0		3.4	7.5	298
155	162.5		145.1			11.4					130.0		160.0				309
160	167.5		149.7			11.6	13.0				133.0		165.0				319
165	172.5		152.5			11.8					138.0	1.8	170.0				328
170	177.5		156.7	3.0		12.2	-		-	-	145.0		175.0				338
175	182.5	+1.44 -0.72	161.3			12.7					149.0	2.1	180.0				348
180	188.0		165.8			13.2					153.0		185.0	+0.72			358
185	193.0		169.8			13.7					157.0		190.0				368
190	198.0		174.6			13.8					162.0		195.0				377
195	203.0		179.6					30.0			167.0		200.0				385
200	208.0		184.2			14.0					171.0		205.0				394
210	218.0		194.2								181.0		215.0				416
215	224.0		200.2								186.0		221.0			9.0	512
220	229.0		205.2					32.0			191.0		226.0				523
225	234.0		210.2								196.0		231.0				535
230	239.0		215.2								201.0		236.0				548
240	249.0		225.2								211.0		246.0				569
250	259.0	+1.62 -0.81	235.2								221.0		256.0	+0.81			593
260	271.0		243.8	3.5		16.0		36.0			227.0	2.4	268.0			12.0	825
270	281.0		253.8								237.0		278.0				860
280	291.0		263.8								247.0		288.0				889
290	301.0		273.8								257.0		298.0				920
300	311.0		283.8								267.0		308.0				951
310	321.0	+1.78 -0.89	293.8								277.0		318.0	+0.89			1000
320	331.0		303.8								287.0		328.0				1018

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 installed in the bore without clearance;

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

e) the tensile strength of the bore material is not less than 300 N/mm².

Example of designation of a spring flat internal eccentric retaining ring, product grade A, nominal diameter 30 mm, made of 65G steel, plain:

Ring A30 GOST 13943-86

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

Ring B30.60S2A.Kd6.Khr GOST 13943-86

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
8	0.14
9	0.18
10	0.29
11	0.32
12	0.36
13	0.40
14	0.43
15	0.48
16	0.51
17	0.55
18	0.67
19	0.72
20	0.76
21	0.81
22	0.85
23	1.20
24	1.31
25	1.42
26	1.53
28	1.64
29	1.69
30	1.75
32	1.85
34	1.97
35	2.50
36	2.63
37	2.73
38	2.84
40	5.00
42	5.40
45	5.80
46	5.90
47	6.10
48	6.40
50	6.80
52	8.00
54	8.50
55	8.80
56	8.90
58	9.10
60	9.90
62	10.3
65	10.9
68	11.4
70	11.8
72	12.2
75	12.8
78	18.6
80	19.2
82	19.6
85	20.4
88	20.8
90	21.8
92	22.3
95	23.1
98	23.8
100	24.3
102	34.4
105	36.8
108	38.0
110	38.8
112	39.2
115	40.9
120	43.0
125	44.8
130	53.5
135	54.8
140	57.0
145	59.3
150	77.4
155	80.0
160	82.8
165	85.4
170	88.0
175	105.4
180	108.6
185	112.0
190	115.4
195	118.6
200	121.8
210	140.8
215	145.6
220	148.1
225	152.1
230	156.1
240	164.2
250	170.2
260	177.0
270	185.0
280	191.6
290	198.7
300	205.9
310	213.2
320	220.4

Comply with DIN 472.