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Metric SPEC Die Springs
Medium-Duty Metric (BLUE)
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CATALOG
NUMBER
Hole Size (mm)
Rod Size (mm)
Free Length (mm)
Spring Rate kg/mm
Deflection For Moderate Life 50% of Free Length
Deflection For Average Life 40% of Free Length
Deflection For Long Life 25% of Free Length
Total Travel to Solid
mm
mm
mm
mm
Load (kg)
Length of Deflection (mm)
Load (kg)
Length of Deflection (mm)
Load (kg)
Length of Deflection (mm)
Load (kg)
Length of Deflection (mm)
St50300
10
4.5
25
1
12.7
12.7
10.2
10.2
6.4
6.4
13.8
13.8
St50340
10
4.5
32
0.86
13.6
15.9
10.9
12.7
6.8
7.9
16
18.7
St50380
10
4.5
38
0.68
12.9
19.1
10.3
15.2
6.5
9.5
15.6
23
St50420
10
4.5
44
0.61
13.5
22.2
10.8
17.8
6.7
11.1
16.2
26.7
St50460
10
4.5
51
0.5
12.7
25.4
10.2
30.3
6.4
12.7
15.9
31.7
St50500
10
4.5
64
0.43
13.6
31.8
10.9
25.4
6.8
15.9
17.2
40.2
St50540
10
4.5
76
0.32
12.2
38.1
9.8
30.5
6.1
19.1
15.8
49
St50580
10
4.5
305
0.11
16.3
152.4
13.1
121.9
8.2
76.2
21.7
202.2
St50620
13
7
25
1.79
22.7
12.7
18.1
10.2
11.3
6.4
26.2
14.7
St50660
13
7
32
1.64
26.1
15.9
20.9
12.7
13
7.9
30.1
18.3
St50700
13
7
38
1.36
25.9
19.1
20.7
15.2
12.9
9.5
30.8
22.7
St50740
13
7
44
1.21
27
22.2
21.6
17.8
13.5
11.1
32.3
26.6
St50780
13
7
51
1.14
29
25.4
23.2
20.3
14.5
12.7
35.8
31.3
St50820
13
7
64
0.93
29.5
31.8
23.6
25.4
14.7
15.9
36.6
39.4
St50860
13
7
76
0.71
27.2
38.1
21.8
30.5
13.6
19.1
34.3
48
St50900
13
7
89
0.54
23.8
44.5
19.1
35.6
11.9
22.2
30.4
56.7
St50940
13
7
305
0.14
21.8
152.4
17.4
121.9
10
76.2
25.2
176
St50980
16
8.5
25
2.34
23.8
10.2
14.9
6.4
25
10.7
St51020
16
8.5
32
2.29
29
12.7
18.1
7.9
35.8
15.7
St51060
16
8.5
38
1.93
36.7
19.1
29.4
15.2
18.4
9.5
39.9
20.7
St51100
16
8.5
44
1.71
38.1
22.2
30.5
17.8
19.1
11.1
42.2
24.6
St51140
16
8.5
51
1.57
39.9
25.4
31.9
20.3
20
12.7
46.2
29.4
St51180
16
8.5
64
1.07
34
31.8
27.2
25.4
17
15.9
39.3
36.6
St51220
16
8.5
76
1
38.1
38.1
30.5
30.5
19.1
19.1
46.7
46.7
St51260
16
8.5
89
0.86
38.1
44.5
30.5
35.6
19.1
22.2
47
54.8
St51300
16
8.5
102
0.79
39.9
50.8
31.9
40.6
20
25.4
51.4
65.4
St51340
16
8.5
305
0.25
38.1
152.4
30.5
121.9
19.1
76.2
49.4
197.7
St51380
19
9.5
25
5.57
70.8
12.7
56.6
10.2
35.4
6.4
77
13.8
St51420
19
9.5
32
4.57
72.6
15.9
58.1
12.7
36.3
7.9
81.2
17.8
St51460
19
9.5
38
3.57
68
19.1
54.4
15.2
34
9.5
77.5
21.7
Metric SPEC Die Springs
Medium-Duty Metric (BLUE)
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