IIS Manufactures & Supplies Belleville Washer as Per DIN 6796

IIS manufactures Belleville washer in imperial as well as metric sizes. Belleville washers also called conical spring washers are manufactured as per DIN 6796 & DIN 6908. IIS Belleville washers are designed specifically for Heavy Duty Bolted section such as Bus Bars, Transformers, Rectifiers, Heat Exchangers, Transmission etc. These washers are intended to counteract the effect of setting which results in bolt/nut assemblies working loose. They do not effectively prevent loosening of the assembly under varying radial load and are designed for use with short bolts predominantly subject to thrust. Belleville washers are high stressed components and cannot be used for dynamic loading and infrequent varying load applications. The force give in the table below is approximate.
Conical Spring washers as per DIN 6908 are intended for use with screw and washer assemblies as specified in DIN 6900 part 5.They are designed to use with bolted connections with bolts of property classes 8.8 to 10.9 (as specified in ISO 898 Part 1). IIS Belleville Washers are tested as per DIN 6796 and DIN 267 Part 26.

IIS has ready stock of all standard sizes of Belleville washers in High Carbon Steel material, Stainless Steel 300 series and 17-7 PH.
Other materials are also available on request View Details

Surface Technology & Coating Services
IIS offers a variety of coating services on all parts manufactured. List of coatings are available below. For other specific coating and applications
Please refer this link

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

4)

2.2

5

0.4

0.60

0.50

920

-

2.5 4)

2.7

6

0.5

0.72

0.61

1540

-

4)

3.2

7

0.6

0.85

0.72

2350

-

3.5 4)

3.7

8

0.8

1.06

0.92

3160

-

4

4.3

9

1.0

1.30

1.12

4050

1400

5

5.3

11

1.2

1.55

1.35

6700

2300

6

6.4

14

1.5

2.00

1.70

9400

4200

7

7.4

17

1.75

2.30

2.00

13700

6200

8

8.4

18

2.0

2.60

2.24

17200

7700

10

10.5

23

2.5

3.20

2.80

27500

12400

12

13

29

3.0

3.95

3.43

40000

18000

14

15

35

3.5

4.65

4.04

55000

25000

16

17

39

4.0

5.25

4.58

75000

34000

18

19

42

4.5

5.80

5.08

95000

57000

20

21

45

5.0

6.40

5.60

122000

73000

22

23

49

5.5

7.05

6.15

152000

91000

24

25

56

6.0

7.75

6.77

175000

122000

27

28

60

6.5

8.35

7.30

230000

161000

30

31

70

7.0

9.20

8.00

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