Washers

Belleville Washers | DIN 6908 | Heavy Duty Belleville Washer | DIN 6796

Belleville Washers

Description:

Belleville washers come under the spring type washers and are used to apply a flexible pre-load to a bolted joint. They can be used individually or in a stack for increased frictional grip. When these washers are used in a stack, they can either be stacked with a similar orientation or stacked orientation depending on the requirements of the applications. The most important advantage of these washers from ITA Fasteners is that they can support huge loads even in a cramped installation space.

Since these washers can be stacked in an unlimited number of ways, they offer extreme versatility and its upto your creative imaginations to decide how to use the washers. This is owed to its structure which consists of a force from its periphery and an opposing force from the conical center. With a suitable arrangement of the washers, dampening effect may also be achieved. It is available in stainless steel, carbon steel, and alloy steel to bear more wear and tear while also making it more corrosion resistant.

Dimensional Standards:

DIN 6796, DIN 6908, DIN 137B, DIN 137A

Size range:

Metric: M3 to M42
Inches: As Per Requirement

BELLEVILLE WASHERS DIMENSIONS

DIN 6796 - Conical spring washer for bolted connections

Legend:
d1 - Inner diameter
d2 - Outer diameter
S - Washer width
h - unloaded washer height
Makings:
Steel: spring steel
Stainless: A2,A4
Plastic: -
Non Ferrous: -
Thread: -
Notes:
Table according to DIN 6796:
dimensions in mm

Nominal size	d1	d2	s	h		Weight kg/1000pcs	For thread size
	H14	h14		max.	min.
2	2,2	5	0,4	0,6	0,5	0,05	M
2,5	2,7	6	0,5	0,72	0,61	0,09	M2,5
3	3,2	7	0,6	0,85	0,72	0,14	M3
3,5	3,7	8	0,8	1,06	0,92	0,25	M3,5
4	4,3	9	1	1,3	1,12	0,38	M4
5	5,3	11	1,2	1,55	1,35	0,69	M5
6	6,4	14	1,5	2	1,7	1,43	M6
7	7,4	17	1,75	2,3	2	2,53	M7
8	8,4	18	2	2,6	2,4	3,13	M8
10	10,5	23	2,5	3,2	2,8	6,45	M10
12	13	29	3	3,95	3,43	12,4	M12
14	15	35	3,5	4,65	4,04	21,6	M14
16	17	39	4	5,25	4,58	30,4	M16
18	19	42	4,5	5,6	5,08	38,9	M18
20	21	45	5	6,4	5,6	48,8	M20
22	23	49	5,5	7,05	6,15	63,5	M22
24	25	56	6	7,75	6,77	92,9	M24
27	28	60	6,5	8,35	7,3	113	M27
30	31	70	7	9,2	8	170	M30

DIN 6908 Conical Spring

Nominal Size	d₁		d₂		S²)	h			Mass (7,85 kg/dm3) per 1000 units, in kg	For thread size
	min. = nominal size	max.	max. = nominal size	min.		As delivered condition		Minimum size after test for permanent set1)
	min. = nominal size	max.	max. = nominal size	min.		max.	min.	Minimum size after test for permanent set1)
2,25³)	2,25	2,35	6	5,70	0,5	0,72	0,61	0,61	0,10	M2,5
2,75 ³)	2,75	2,85	7	6,64	0,6	0,85	0,72	0,72	0,15	M3
3,2³)	3,20	3,32	8	7,64	0,8	1,06	0,92	0,92	0,27	M3,5
3,6	3,60	3,72	9	8,64	1,0	1,30	1,12	1,12	0,42	M4
4,55	4,55	4,67	11	10,57	1,2	1,55	1,35	1,35	0,74	M5
5,5	5,50	5,62	14	13,57	1,5	2,60	2,30	1,70	1,53	M6
7,4	7,40	7,55	18	17,57	2,0	3,10	2,80	2,24	3,32	M8
9,3	9,30	9,45	23	22,48	2,5	3,60	3,30	2,80	6,82	M10
11	11,0	11,18	29	28,48	3,0	4,10	3,80	3,43	13,3	M12

Clearance hole diameter, d₁	For thread size	d₂	h	S		t	Spring force, in N1)	Approximate mass (7,85 kg/dm3) per 1 000 units in kg
H12		h14	K14		Limit deviations
6,5	M7	17	2,3	1,5	± 0.08	0,3	3 930	2,28

din 137 B - Spring Wave Washers, Form B

Equivalent norms: DIN 137 B; CSN 21733; UNI 8840B;

Nominal size	For thread	d1	d2	s	h		Weight kg/1000pcs
		H14	js16		min.	max.
3	M3	3,2	8	0,5 ± 0,05	0,8	1,6	0,166
3,5	M3,5	3,7	8	0,5 ± 0,05	0,9	1,8	0,154
4	M4	4,3	9	0,5 ± 0,05	1	2	0,193
5	M5	5,3	11	0,5 ± 0,05	1,1	2,2	0,286
6	M6	6,4	12	0,5 ± 0,05	1,3	2,6	0,318
7	M7	7,4	14	0,8 ± 0,06	1,5	3	0,7
8	M8	8,4	15	0,8 ± 0,06	1,5	3	0,762
10	M10	10,5	21	1 ± 0,07	2,1	4,2	2,04
12	M12	13	24	1,2 ± 0,07	2,5	5	3,01
14	M14	15	28	1,6 ± 0,08	3	6	5,51
16	M16	17	30	1,6 ± 0,08	3,2	6,4	6,03
18	M18	19	34	1,6 ± 0,08	3,3	6,6	7,84
20	M20	21	36	1,6 ± 0,08	3,7	7,4	8,43
22	M22	23	40	1,8 ± 0,1	3,9	7,8	11,9
24	M24	25	44	1,8 ± 0,1	4,1	8,2	14,5
27	M27	28	50	2 ± 0,1	4,7	9,4	21,1
30	M30	31	56	2,2 ± 0,1	5	10	29,5
33	M33	34	60	2,2 ± 0,1	5,3	10,6	33,1
36	M36	37	68	2,5 ± 0,15	5,8	11,6	50,2

DIN 137 A - Spring washers curved, Form A

Equivalent norms: CSN 21733; UNI 8840A;

Nominal size	d1	d2	s		h		Weight kg/1000pcs	For size
	H14	js16	Nominal size	tol.	min.	max.
3	3,2	8	0,5	±0,05	0,8	1,6	0,166	M3
3,5	3,7	8	0,5	±0,05	0,9	1,8	0,154	M3,5
4	4,3	9	0,5	±0,05	1	2	0,193	M4
5	5,3	11	0,5	±0,05	1,1	2,2	0,286	M5
6	6,4	12	0,5	±0,05	1,3	2,6	0,318	M6
7	7,4	14	0,8	±0,06	1,5	3	0,7	M7
8	8,4	15	0,8	±0,06	1,5	3	0,762	M8
10	10,5	21	1	±0,07	2,1	4,2	2,04	M10
12	13	24	1,2	±0,07	2,5	5	3,01	M12
14	15	28	1,6	±0,08	3	6	5,51	M14
16	17	30	1,6	±0,08	3,2	6,4	6,03	M16
18	19	34	1,6	±0,08	3,3	6,6	7,84	M18
20	21	36	1,6	±0,08	3,7	7,4	8,43	M20
22	23	40	1,8	±0,1	3,9	7,8	11,9	M22
24	25	44	1,8	±0,1	4,1	8,2	14,5	M24
27	28	50	2	±0,1	4,7	9,4	21,1	M27
30	31	56	2,2	±0,1	5	10	29,5	M30
33	34	60	2,2	±0,1	5,3	10,6	33,1	M33
36	37	68	2,5	±0,15	5,8	11,6	50,2	M36

Belleville Washer as Per DIN 6796

Heavy Duty Belleville Washers As per DIN 6796
Material : 50CrV4 or Spring Steel CK75

NOMINAL BOLT SIZE MM	D1 H14 MM	D2 H14 MM	S3) MM	H MAX 1) MM	H MIN 2) MM	FLATTENING FORCE N	RESIDUAL SPRING FORCE N
2⁴)	2.2	5	0.4	0.6	0.5	920	-
2.5 ⁴)	2.7	6	0.5	0.72	0.61	1540	-
3 4)	3.2	7	0.6	0.85	0.72	2350	-
3.5⁴)	3.7	8	0.8	1.06	0.92	3160	-
4	4.3	9	1	1.3	1.12	4050	1400
5	5.3	11	1.2	1.55	1.35	6700	2300
6	6.4	14	1.5	2	1.7	9400	4200
7	7.4	17	1.75	2.3	2	13700	6200
8	8.4	18	2	2.6	2.24	17200	7700
10	10.5	23	2.5	3.2	2.8	27500	12400
12	13	29	3	3.95	3.43	40000	18000
14	15	35	3.5	4.65	4.04	55000	25000
16	17	39	4	5.25	4.58	75000	34000
18	19	42	4.5	5.8	5.08	95000	57000
20	21	45	5	6.4	5.6	122000	73000
22	23	49	5.5	7.05	6.15	152000	91000
24	25	56	6	7.75	6.77	175000	122000
27	28	60	6.5	8.35	7.3	230000	161000
30	31	70	7	9.2	8	280000	196000

Heavy Duty Belleville Washers As per DIN 6908
Material : 50CrV4 or Spring Steel CK75

M	D1_MIN	D2_MAX	S_MAX	S_MIN	H_MAX	H_MIN
2.5	2.25	6	0.5		0.72	0.61
3	2.75	7	0.6		0.85	0.72
3.5	3.2	8	0.8		1.06	0.92
4	3.6	9	1		1.3	1.12
5	4.55	11	1.2		1.55	1.35
6	5.5	14	1.58	1.42	2.6	2.3
7	6.5	17	1.58	1.42	2.35	2.3
8	7.4	18	2		3.6	2.8
10	9.3	23	2.5		4.1	3.3
12	11	29	3		3.5	3.8

Heavy Duty Belleville Washer as Per DIN 6796

Part No.	Dimensions									Load Flat (N)	Nominal Bolt Size
	in inches				in mm
	De	d	t	h (min)	De	di	t	h max	h min
BW-052204	0.197	0.09	0.016	0.02	5	2.2	0.4	0.6	0.5	625	M 2
BW-062705	0.236	0.11	0.02	0.024	6	2.7	0.5	0.72	0.61	945	M 2.5
BW-073206	0.276	0.13	0.024	0.028	7	3.2	0.6	0.85	0.72	1320	M 3
BW-083708	0.315	0.15	0.031	0.036	8	3.7	0.8	1.06	0.92	2410	M 3.5
BW-094310	0.354	0.17	0.039	0.044	9	4.3	1	1.3	1.12	3770	M 4
BW-115312	0.433	0.21	0.047	0.053	11	5.3	1.2	1.55	1.35	4580	M 5
BW-146415	0.551	0.25	0.059	0.067	14	6.4	1.5	2	1.7	8590	M 6
BW-177417	0.669	0.29	0.069	0.079	17	7.4	1.75	2.3	2	11300	M 7
BW-188420	0.709	0.33	0.079	0.088	18	8.4	2	2.6	2.24	14900	M 8
BW-231025	0.906	0.41	0.098	0.11	23	10.5	2.5	3.2	2.8	22100	M 10
BW-291330	1.142	0.51	0.118	0.135	29	13	3	3.95	3.43	34100	M 12
BW-351535	1.378	0.59	0.138	0.159	35	15	3.5	4.65	4.04	46000	M 14
BW-391740	1.535	0.67	0.157	0.18	39	17	4	5.25	4.58	59700	M 16
BW-421945	1.654	0.75	0.177	0.2	42	19	4.5	5.8	5.08	74400	M 18
BW-452150	1.772	0.83	0.197	0.22	45	21	5	6.4	5.6	93200	M 20
BW-492355	1.929	0.91	0.217	0.242	49	23	5.5	7.05	6.15	113700	M 22
BW-562560	2.205	0.98	0.236	0.267	56	25	6	7.75	6.77	131000	M 24
BW-602865	2.362	1.1	0.256	0.287	60	28	6.5	8.35	7.3	154000	M 27
BW-703170	2.756	1.22	0.276	0.315	70	31	7	9.2	8	172000	M 30