During the mid nineteenth century the conical shaped disc spring was invented, also, known as the Belleville washer after its
inventor, Julian F. Belleville. Today in the 21st century disc springs or Belleville washers are utilized in many applications such as spacecraft, satellites, medical devices, defense systems, automobiles, machine tools, valves, piping systems to name just a few.
Disc springs or Belleville washers, a non-flat washer with a conical shape which gives the washers their spring characteristics and are designed to be loaded in the axial direction only. Typically used as springs or to apply a preload with a flexible quality to a bolted joint.
Disc springs used singularly or stacked in different combinations allows for variable spring characteristics suiting the given application.
|
Code
|
O.D.
(D)
|
I.D.
(d)
|
Thickness
(t)
|
Cone Height
(ho)
|
Overall Height
(Ho)
|
Min Qty.
|
|
RD6-3.2-0.3
|
6
|
3.2
|
0.3
|
0.15
|
0.45
|
50
|
|
RD8-3.2-0.2
|
8
|
3.2
|
0.2
|
0.2
|
0.4
|
50
|
|
RD8-3.2-0.3
|
8
|
3.2
|
0.3
|
0.25
|
0.55
|
50
|
|
RD8-3.2-0.4
|
8
|
3.2
|
0.4
|
0.2
|
0.6
|
50
|
|
RD8-4.2-0.2
|
8
|
4.2
|
0.2
|
0.25
|
0.45
|
50
|
|
RD8-4.2-0.3
|
8
|
4.2
|
0.3
|
0.25
|
0.55
|
50
|
|
RD8-4.2-0.4
|
8
|
4.2
|
0.4
|
0.2
|
0.6
|
50
|
|
RD10-3.2-0.3
|
10
|
3.2
|
0.3
|
0.35
|
0.65
|
50
|
|
RD10-3.2-0.4
|
10
|
3.2
|
0.4
|
0.3
|
0.7
|
50
|
|
RD10-3.2-0.5
|
10
|
3.2
|
0.5
|
0.25
|
0.75
|
50
|
|
RD10-4.2-0.4
|
10
|
4.2
|
0.4
|
0.3
|
0.7
|
50
|
|
RD10-4.2-0.5
|
10
|
4.2
|
0.5
|
0.25
|
0.75
|
50
|
|
RD10-5.2-0.25
|
10
|
5.2
|
0.25
|
0.3
|
0.55
|
50
|
|
RD10-5.2-0.4
|
10
|
5.2
|
0.4
|
0.3
|
0.7
|
50
|
|
RD10-5.2-0.5
|
10
|
5.2
|
0.5
|
0.25
|
0.75
|
50
|
|
RD12-4.2-0.4
|
12
|
4.2
|
0.4
|
0.4
|
0.8
|
50
|
|
RD12-4.2-0.5
|
12
|
4.2
|
0.5
|
0.35
|
0.85
|
50
|
|
RD12-4.2-0.6
|
12
|
4.2
|
0.6
|
0.4
|
1
|
50
|
|
RD12-5.2-0.5
|
12
|
5.2
|
0.5
|
0.4
|
0.9
|
50
|
|
RD12-5.2-0.6
|
12
|
5.2
|
0.6
|
0.35
|
0.95
|
50
|
|
RD12-6.2-0.5
|
12
|
6.2
|
0.5
|
0.35
|
0.85
|
50
|
|
RD12-6.2-0.6
|
12
|
6.2
|
0.6
|
0.35
|
0.95
|
50
|
|
RD12.5-5.2-0.5
|
12.5
|
5.2
|
0.5
|
0.35
|
0.85
|
50
|
|
RD12.5-6.2-0.35
|
12.5
|
6.2
|
0.35
|
0.45
|
0.8
|
50
|
|
RD12.5-6.2-0.5
|
12.5
|
6.2
|
0.5
|
0.35
|
0.85
|
50
|
|
RD12.5-6.2-0.7
|
12.5
|
6.2
|
0.7
|
0.3
|
1
|
50
|
|
RD14-7.2-0.35
|
14
|
7.2
|
0.35
|
0.45
|
0.8
|
50
|
|
RD14-7.2-0.5
|
14
|
7.2
|
0.5
|
0.4
|
0.9
|
50
|
|
RD14-7.2-0.8
|
14
|
7.2
|
0.8
|
0.3
|
1.1
|
50
|
|
RD15-5.2-0.4
|
15
|
5.2
|
0.4
|
0.55
|
0.95
|
50
|
|
RD15-5.2-0.5
|
15
|
5.2
|
0.5
|
0.5
|
1
|
50
|
|
RD15-5.2-0.6
|
15
|
5.2
|
0.6
|
0.45
|
1.05
|
50
|
|
RD15-5.2-0.7
|
15
|
5.2
|
0.7
|
0.4
|
1.1
|
50
|
|
RD15-6.2-0.5
|
15
|
6.2
|
0.5
|
0.5
|
1
|
50
|
|
RD15-6.2-0.6
|
15
|
6.2
|
0.6
|
0.45
|
1.05
|
50
|
|
RD15-6.2-0.7
|
15
|
6.2
|
0.7
|
0.4
|
1.1
|
50
|
|
RD15-8.2-0.7
|
15
|
8.2
|
0.7
|
0.4
|
1.1
|
50
|
|
RD15-8.2-0.8
|
15
|
8.2
|
0.8
|
0.4
|
1.2
|
50
|
|
RD16-8.2-0.4
|
16
|
8.2
|
0.4
|
0.5
|
0.9
|
50
|
|
RD16-8.2-0.6
|
16
|
8.2
|
0.6
|
0.45
|
1.05
|
50
|
|
RD16-8.2-0.7
|
16
|
8.2
|
0.7
|
0.45
|
1.15
|
50
|
|
RD16-8.2-0.8
|
16
|
8.2
|
0.8
|
0.4
|
1.2
|
50
|
|
RD16-8.2-0.9
|
16
|
8.2
|
0.9
|
0.35
|
1.25
|
50
|
|
RD18-6.2-0.4
|
18
|
6.2
|
0.4
|
0.6
|
1
|
50
|
|
RD18-6.2-0.5
|
18
|
6.2
|
0.5
|
0.6
|
1.1
|
50
|
|
RD18-6.2-0.6
|
18
|
6.2
|
0.6
|
0.6
|
1.2
|
50
|
|
RD18-6.2-0.7
|
18
|
6.2
|
0.7
|
0.55
|
1.25
|
50
|
|
RD18-6.2-0.8
|
18
|
6.2
|
0.8
|
0.5
|
1.3
|
50
|
|
RD18-8.2-0.5
|
18
|
8.2
|
0.5
|
0.6
|
1.1
|
50
|
|
RD18-8.2-0.7
|
18
|
8.2
|
0.7
|
0.55
|
1.25
|
50
|
|
RD18-8.2-0.8
|
18
|
8.2
|
0.8
|
0.5
|
1.3
|
50
|
|
RD18-8.2-1
|
18
|
8.2
|
1
|
0.4
|
1.4
|
50
|
|
RD18-9.2-0.45
|
18
|
9.2
|
0.45
|
0.6
|
1.05
|
50
|
|
RD18-9.2-0.7
|
18
|
9.2
|
0.7
|
0.5
|
1.2
|
50
|
|
RD18-9.2-1
|
18
|
9.2
|
1
|
0.4
|
1.4
|
50
|
|
RD20-8.2-0.6
|
20
|
8.2
|
0.6
|
0.7
|
1.3
|
50
|
|
RD20-8.2-0.7
|
20
|
8.2
|
0.7
|
0.65
|
1.35
|
50
|
|
RD20-8.2-0.8
|
20
|
8.2
|
0.8
|
0.6
|
1.4
|
50
|
|
RD20-8.2-0.9
|
20
|
8.2
|
0.9
|
0.55
|
1.45
|
50
|
|
RD20-8.2-1
|
20
|
8.2
|
1
|
0.55
|
1.55
|
50
|
|
RD20-10.2-0.5
|
20
|
10.2
|
0.5
|
0.65
|
1.15
|
50
|
|
RD20-10.2-0.8
|
20
|
10.2
|
0.8
|
0.55
|
1.35
|
50
|
|
RD20-10.2-0.9
|
20
|
10.2
|
0.9
|
0.55
|
1.45
|
50
|
|
RD20-10.2-1
|
20
|
10.2
|
1
|
0.55
|
1.55
|
50
|
|
RD20-10.2-1.1
|
20
|
10.2
|
1.1
|
0.45
|
1.55
|
50
|
|
RD20-10.2-1.25
|
20
|
10.2
|
1.25
|
0.5
|
1.75
|
25
|
|
RD20-10.2-1.5
|
20
|
10.2
|
1.5
|
0.3
|
1.8
|
25
|
|
RD22.5-11.2-0.6
|
22.5
|
11.2
|
0.6
|
0.8
|
1.4
|
50
|
|
RD22.5-11.2-0.8
|
22.5
|
11.2
|
0.8
|
0.65
|
1.45
|
50
|
|
RD22.5-11.2-1.25
|
22.5
|
11.2
|
1.25
|
0.5
|
1.75
|
25
|
|
RD23-8.2-0.7
|
23
|
8.2
|
0.7
|
0.8
|
1.5
|
50
|
|
RD23-8.2-0.8
|
23
|
8.2
|
0.8
|
0.75
|
1.55
|
50
|
|
RD23-8.2-0.9
|
23
|
8.2
|
0.9
|
0.7
|
1.6
|
50
|
|
RD23-8.2-1
|
23
|
8.2
|
1
|
0.7
|
1.7
|
50
|
|
RD23-10.2-0.9
|
23
|
10.2
|
0.9
|
0.75
|
1.65
|
50
|
|
RD23-10.2-1
|
23
|
10.2
|
1
|
0.7
|
1.7
|
50
|
|
RD23-10.2-1.25
|
23
|
10.2
|
1.25
|
0.65
|
1.9
|
25
|
|
RD23-12.2-1
|
23
|
12.2
|
1
|
0.6
|
1.6
|
50
|
|
RD23-12.2-1.25
|
23
|
12.2
|
1.25
|
0.6
|
1.85
|
25
|
|
RD23-12.2-1.5
|
23
|
12.2
|
1.5
|
0.6
|
2.1
|
25
|
|
RD25-10.2-1
|
25
|
10.2
|
1
|
0.75
|
1.75
|
50
|
|
RD25-12.2-0.7
|
25
|
12.2
|
0.7
|
0.9
|
1.6
|
50
|
|
RD25-12.2-0.9
|
25
|
12.2
|
0.9
|
0.7
|
1.6
|
50
|
|
RD25-12.2-1
|
25
|
12.2
|
1
|
0.8
|
1.8
|
50
|
|
RD25-12.2-1.25
|
25
|
12.2
|
1.25
|
0.7
|
1.95
|
25
|
|
RD25-12.2-1.5
|
25
|
12.2
|
1.5
|
0.55
|
2.05
|
25
|
|
RD28-10.2-0.8
|
28
|
10.2
|
0.8
|
0.95
|
1.75
|
50
|
|
RD28-10.2-1
|
28
|
10.2
|
1
|
0.9
|
1.9
|
50
|
|
RD28-10.2-1.25
|
28
|
10.2
|
1.25
|
0.8
|
2.05
|
25
|
|
RD28-10.2-1.5
|
28
|
10.2
|
1.5
|
0.7
|
2.2
|
25
|
|
RD28-12.2-1
|
28
|
12.2
|
1
|
0.95
|
1.95
|
50
|
|
RD28-12.2-1.25
|
28
|
12.2
|
1.25
|
0.85
|
2.1
|
25
|
|
RD28-12.2-1.5
|
28
|
12.2
|
1.5
|
0.75
|
2.25
|
25
|
|
RD28-14.2-0.8
|
28
|
14.2
|
0.8
|
1
|
1.8
|
50
|
|
RD28-14.2-1
|
28
|
14.2
|
1
|
0.8
|
1.8
|
50
|
|
RD28-14.2-1.25
|
28
|
14.2
|
1.25
|
0.85
|
2.1
|
25
|
|
RD28-14.2-1.5
|
28
|
14.2
|
1.5
|
0.65
|
2.15
|
25
|
|
RD31.5-12.2-1
|
31.5
|
12.2
|
1
|
1.1
|
2.1
|
50
|
|
RD31.5-12.2-1.25
|
31.5
|
12.2
|
1.25
|
0.95
|
2.2
|
25
|
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