Prdouct Category

When ordering bellows, please refer to the following table of our standard types of metal mold. Our standard pitch and producible thickness in the following table are adjusted to SS316L.

Part No.
O.D.
I.D.
W.T.
Pitch
C.T.
End Size
Spring Rate
Working Offset
Max. Press.
Effiction Area
Dl mm
dl mm
l mm
(N/mm)
(mm)
(MPA)
F/cm2
1
10
6.2
0.1
1
0.65
8
6.7
4
230.75
0.09
3.49
0.52
0.12
1.1
0.6
8.8
2
414.9
0.16
3.65
2
12
7.5
0.12
1.2
0.75
10
8
4
291.02
0.19
3.25
0.75
1.4
1
275.3
0.21
4.65
3
14
9
0.1
1.8
1
12
3
139.84
0.24
2.91
1.04
4
15
9.5
0.12
1.8
1.1
13
10.03
4
194.54
0.21
3.1
1.18
5
18
11.5
0.12
2.2
1.4
14
12.03
4
139.11
0.22
3
1.71
6
20
12
0.12
2.1
1.2
12.5
2.5
76.14
0.34
1.25
2.01
12.5
0.1
2.1
1.2
18
13.03
4
54.92
0.42
2
2.07
0.12
96.78
0.34
1.7
7
22
14
0.1
2.2
1.3
19.5
14.53
4
50.33
0.41
1.54
2.54
0.12
88.58
0.34
1.8
8
22.5
15
0.15
1.8
1
20
3
232.72
0.29
1.6
2.76
9
25
16.5
0.1
2.3
1.35
22
17.03
4
49.13
0.51
1.24
3.38
0.12
86.34
0.42
1.46
10
28
18
0.1
2.6
1.5
25
18.57
4
32.53
0.61
1.1
4.15
0.12
57.03
0.53
1.3
11
31
19.5
0.12
2.8
1.6
28.5
20.07
4
40.19
0.65
1.15
5.01
12
32
21.5
0.1
3
1.7
2.8
22.07
4
33.41
0.78
0.95
5.62
0.12
58.51
0.65
1.15
22
0.12
69.53
0.65
1.15
5.73
13
35
24
0.15
2.8
1.5
31
4
112.61
0.55
1.2
6.83
14
38
25.5
0.12
3.2
1.8
34
26.16
4
40.6
0.86
0.85
7.92
0.14
65.21
0.73
0.98
15
39
27.5
0.1
2.8
1.8
31
4
32.29
0.95
0.71
8.68
16
40
27.5
0.12
3.4
2
36
28.1
5
43.76
0.91
0.86
8.95
0.14
70.27
0.76
1
28
0.12
50.47
0.91
1
9.08
17
45
31
0.12
3.6
2.1
40
31.97
5
34.85
1.06
0.71
11.34
0.14
55.91
0.91
0.82
18
46
32
0.16
3.6
2.1
*
*
*
86.98
0.79
0.71
11.94
0.18
125.1
0.71
0.82
19
48
35.6
0.16
3.2
2.2
48
3
140.4
0.87
0.89
11.94
20
50
34.3
0.125
4
2.8
35
6
30.8
1.85
0.85
13.95
21
51
35.6
0.12
3.6
2.2
45
36.67
5
29.9
1.18
0.62
11.34
0.14
47.91
1.01
0.7
22
55
37
0.14
4.2
2.4
50
37.96
5
30.93
1.25
0.64
16.62
0.16
46.53
1.11
0.74
23
60
41
0.14
4.5
2.5
55
42
5
29.04
1.59
0.58
20.03
0.16
43.68
1.37
0.64
0.18
62.65
1.22
0.72
24
65
47
0.16
4.3
3.3
48
6
59
1.99
0.52
24.63
25
79
55
0.16
5.4
3
70
56.02
6
28.71
2.16
0.44
35.26
0.18
41.1
2.16
0.48
26
100
75
0.16
6
3.6
76
34.52
2.16
0.32
60.13
0.2
68.16
1.14
0.5

* When either of the end shapes is type A,C,E, or, F, it may be not producible in case the thickness is almost minimum or maximum, even if it is within the producible thickness. Please contact us.
* Outside diameters and standard pitches are shown as being of three levels: 1,2 and 3. With in this range, please state your desired size of outside diameter, because the metal mold can be any size. However, some shapes may not be producible.

Material Material coefficient Material Material coefficient
L H U L H U
Phosphor Bronze
/C5212
1.0 1.0 1.0 Corrosion-proof and heatproof superalloy
/NCF(Inconel)625(LCF)
1.2 0.5 1.15
Brass
/C2400
1.1 1.0 1.0 Corrosion-proof alloy
/Hastelloy C series
1.1 0.65 1.1
Beryllium copper
/C1720
1.2 0.8 1.0 Nickel-copper alloy
/Monel400(NW4400)
1.1 0.8 1.0
Stainless steel
/SUS304L
1.0 0.65 0.95 Nickel
/NW2200 series
1.3 1.0 0.9
Stainless steel
/SUS316L
1.0 0.65 0.95 Wide variety of titanium
1.3 0.8 1.0
Stainless steel
/SUS321
1.1 0.6 1.05 Wide variety of aluminum
1.5 1.0 0.9
Stainless steel
/SUS347
1.1 0.6 1.05 Constant elastic alloy
/Elingbar(EL3)
1.3 0.75 0.95
Precipitation hardening stainless steel
/ASL(AM)350
1.3 0.6 1.1 High corrosion-proof metal
/Eljiroy, Spron, etc
1.2 0.65 1.1