Helical springs SZ 8400
Helical compression spring with
oval wire cross-section
Material:
Patented cold-drawn steel wire,
class C in accordance with DIN 17223
Tolerances similar DIN 2095 The springs
are set, closed at both ends per 1 winding
and ground.
Special treatment: Shot-blasted
Note:
For long life time with
oscillating load smax = ca. 0.7 sn.
Order example: Helical spring with
oval wire cross-section SZ 8400
Da = 32 mm, l0 = 69 mm
Addition 32 x 69
Order number SZ 8400.32 x 69
The spring force of springs with an oval
cross-section is higher than that of comparable springs with a round wire cross-section.
However, the life time is somewhat shorter as
a result of the unfavourable stress distribution
in the wire cross-section.
Add size to
order number
Order number SZ 8400.
Da
Di
axb
11
12.5
13
14
15.5*
17
17.6
25
25
25
25
25
32
32
32
32
38
38
38
38
38
50
50
50
7
7.5
9
8
8.5
9
9.6
13
13
13
13
13
17
17
17
17
21
21
21
21
21
28
28
28
2 x 1.25
2.5 x 1.5
2 x 1.25
3 x 1.6
3.5 x 2.2
4 x2
4 x2
6 x3
6 x3
6 x3
6 x3
6 x3
7.5 x 4
7.5 x 4
7.5 x 4
7.5 x 4
8.5 x 5
8.5 x 5
8.5 x 5
8.5 x 5
8.5 x 5
11 x 6
11 x 6
11 x 6
l0
ln
sn
Spring force Fn*) (N)
±10 %
lBl.
20
20
50
25
25
50
30
54
65
77
99
123
69
84
98
127
67
85
102
120
147
100
150
193
10
13
20
15
17
32
18
35
42
50
64
79
45
55
64
83
45
57
68
80
97
72
105
135
10
7
30
10
8
18
12
19
23
27
35
44
24
29
34
44
22
28
34
40
50
28
45
58
200
270
150
400
740
690
690
1180
1180
1180
1180
1180
2020
2020
2020
2020
2950
2950
2950
2950
2950
3440
3440
3440
9.5
12
18.5
13.5
15.5
30
17.5
32
36
44
52
68
43
50
60
74
44
50
64
70
88
60
87
118
Standard pack
50
50
50
50
40
30
40
20
10
10
10
10
10
10
10
10
10
6
6
6
4
4
4
2
11
12.5
13
14
15.5
17
17.6
25
25
25
25
25
32
32
32
32
38
38
38
38
38
50
50
50
x 20
x 20
x 50
x 25
x 25
x 50
x 30
x 54
x 65
x 77
x 99
x123
x 69
x 84
x 98
x127
x 67
x 85
x102
x120
x147
x100
x150
x193
*) Helical springs arranged according to forces, see relevant page
* Helical compression spring with trapezoidal wire cross-section
As at 10.2015
5.37