Extra-Heavy Duty (Gold) ISO Die Springs - Size, Deflection, and Load Chart
  For Optimum Life For Long Life Max. Operating Def. Max.
Deflection*
Hole
(A)		 Rod
(B)		 Free
Length
(C)		 Part
Number		 Load @
1 mM Def.
(N)		 Load
(N)		 Deflection
(15% of
Length)		 Load
(N)		 Deflection
(17% of
Length)		 Load
(N)		 Deflection
(20% of
Length)
10 5 25
32
38
44
51
64
76
305 		ISO410025
ISO410032
ISO410038
ISO410044
ISO410051
ISO410064
ISO410076
ISO410305 		36.8
27.9
23.7
19.2
16.5
13.2
10.9
2.6 		138.0
133.9
135.1
126.7
126.2
126.7
124.3
119.0 		3.8
4.8
5.7
6.6
7.7
9.6
11.4
45.8 		156.4
151.8
153.1
143.6
143.1
143.6
140.8
134.8 		4.3
5.4
6.5
7.5
8.7
10.9
12.9
51.9 		184.0
178.6
180.1
169.0
168.3
169.0
165.7
158.6 		5.0
6.4
7.6
8.8
10.2
12.8
15.2
61.0 		6.2
8.0
9.5
11.0
13.0
16.0
19.0
76.0
12.5 6.3 25
32
38
44
51
64
76
89
305		 ISO412025
ISO412032
ISO412038
ISO412044
ISO412051
ISO412064
ISO412076
ISO412089
ISO412305		 58.5
43.9
36.0
30.3
26.2
21.2
17.1
14.5
4.3		 219.4
210.7
205.2
200.0
200.4
203.5
194.9
193.6
196.7		 3.8
4.8
5.7
6.6
7.7
9.6
11.4
13.4
45.8		 248.6
238.8
232.6
226.6
227.2
230.7
220.9
219.4
223.0		 4.3
5.4
6.5
7.5
8.7
10.9
12.9
15.1
51.9		 292.5
281.0
273.6
266.6
267.2
271.4
259.9
258.1
262.3		 5.0
6.4
7.6
8.8
10.2
12.8
15.2
17.8
61.0		 6.2
8.0
9.5
11.0
13.0
16.0
19.0
22.0
76.0
16 8 25
32
38
44
51
64
76
89
102
305 		ISO416025
ISO416032
ISO416038
ISO416044
ISO416051
ISO416064
ISO416076
ISO416089
ISO416102
ISO416305 		118.0
89.0
72.1
60.9
52.3
41.2
34.1
29.5
25.6
8.4 		442.5
427.2
411.0
401.9
400.1
395.5
388.7
393.8
391.7
384.3 		3.8
4.8
5.7
6.6
7.7
9.6
11.4
13.4
15.3
45.8 		501.5
484.2
465.8
455.5
453.4
448.3
440.6
446.3
443.9
435.5 		4.3
5.4
6.5
7.5
8.7
10.9
12.9
15.1
17.3
51.9 		590.0
569.6
548.0
535.9
533.5
527.4
518.3
525.1
522.2
512.4 		5.0
6.4
7.6
8.8
10.2
12.8
15.2
17.8
20.4
61.0 		6.2
8.0
9.5
11.0
13.0
16.0
19.0
22.0
26.0
76.0
20 10 25
32
38
44
51
64
76
89
102
115
127
139
152
305 		ISO420025
ISO420032
ISO420038
ISO420044
ISO420051
ISO420064
ISO420076
ISO420089
ISO420102
ISO420115
ISO420127
ISO420139
ISO420152
ISO420305 		293.0
224.0
177.0
149.0
128.0
99.0
81.7
69.5
60.6
53.0
47.5
43.0
39.0
21.2 		1098.8
1075.2
1008.9
983.4
979.2
950.4
931.4
927.8
927.2
914.3
904.9
896.6
889.2
969.9 		3.8
4.8
5.7
6.6
7.7
9.6
11.4
13.4
15.3
17.3
19.1
20.9
22.8
45.8 		1245.3
1218.6
1143.4
1114.5
1109.8
1077.1
1055.6
1051.5
1050.8
1036.2
1025.5
1016.1
1007.8
1099.2 		4.3
5.4
6.5
7.5
8.7
10.9
12.9
15.1
17.3
19.6
21.6
23.6
25.8
51.9 		1465.0
1433.6
1345.2
1311.2
1305.6
1267.2
1241.8
1237.1
1236.2
1219.0
1206.5
1195.4
1185.6
1293.2 		5.0
6.4
7.6
8.8
10.2
12.8
15.2
17.8
20.4
23.0
25.4
27.8
30.4
61.0 		6.2
8.0
9.5
11.0
13.0
16.0
19.0
22.0
26.0
29.0
32.0
35.0
8.0
76.0
25 12.5 32
38
44
51
64
76
89
102
115
127
152
178
203
305 		ISO425032
ISO425038
ISO425044
ISO425051
ISO425064
ISO425076
ISO425089
ISO425102
ISO425115
ISO425127
ISO425152
ISO425178
ISO425203
ISO425305 		374.4
346.0
244.0
207.5
161.0
130.8
110.5
96.3
85.7
76.3
63.5
53.9
47.0
30.9 		1797.1
1972.2
1610.4
1587.4
1545.6
1491.1
1475.2
1473.4
1478.3
1453.5
1447.8
1439.1
1431.2
1413.7 		4.8
5.7
6.6
7.7
9.6
11.4
13.4
15.3
17.3
19.1
22.8
26.7
30.5
45.8 		2036.7
2235.2
1825.1
1799.0
1751.7
1689.9
1671.9
1669.8
1675.4
1647.3
1640.8
1631.0
1622.0
1602.2 		5.4
6.5
7.5
8.7
10.9
12.9
15.1
17.3
19.6
21.6
25.8
30.3
34.5
51.9 		2396.2
2629.6
2147.2
2116.5
2060.8
1988.2
1966.9
1964.5
1971.1
1938.0
1930.4
1918.8
1908.2
1884.9 		6.4
7.6
8.8
10.2
12.8
15.2
17.8
20.4
23.0
25.4
30.4
35.6
40.6
61.0 		8.0
9.5
11.0
13.0
16.0
19.0
22.0
26.0
29.0
32.0
38.0
44.0
51.0
76.0
32 16 38
44
51
64
76
89
102
115
127
152
178
203
254
305 		ISO432038
ISO432044
ISO432051
ISO432064
ISO432076
ISO432089
ISO432102
ISO432115
ISO432127
ISO432152
ISO432178
ISO432203
ISO432254
ISO432305 		528.2
424.4
353.0
269.2
218.5
180.3
155.0
140.0
124.0
102.0
88.2
76.0
60.8
49.0 		3010.7
2801.0
2700.5
2584.3
2490.9
2407.0
2371.5
2415.0
2362.2
2325.6
2354.9
2314.2
2316.5
2241.8 		5.7
6.6
7.7
9.6
11.4
13.4
15.3
17.3
19.1
22.8
26.7
30.5
38.1
45.8 		3412.2
3174.5
3060.5
2928.9
2823.0
2727.9
2687.7
2737.0
2677.2
2635.7
2668.9
2622.8
2625.3
2540.7 		6.5
7.5
8.7
10.9
12.9
15.1
17.3
19.6
21.6
25.8
30.3
34.5
43.2
51.9 		4014.3
3734.7
3600.6
3445.8
3321.2
3209.3
3162.0
3220.0
3149.6
3100.8
3139.9
3085.6
3088.6
2989.0 		7.6
8.8
10.2
12.8
15.2
17.8
20.4
23.0
25.4
30.4
35.6
40.6
50.8
61.0 		9.5
11.0
13.0
16.0
19.0
22.0
26.0
29.0
32.0
38.0
44.0
51.0
64.0
76.0
40 20 51
64
76
89
102
115
127
152
203
254
305		 ISO440051
ISO440064
ISO440076
ISO440089
ISO440102
ISO440115
ISO440127
ISO440152
ISO440203
ISO440254
ISO440305		 628.0
487.0
379.0
321.0
281.0
245.0
221.0
168.0
132.0
107.0
87.8		 4804.2
4675.2
4320.6
4285.4
4299.3
4226.3
4210.1
3830.4
4019.4
4076.7
4016.9		 7.7
9.6
11.4
13.4
15.3
17.3
19.1
22.8
30.5
38.1
45.8		 5444.8
5298.6
4896.7
4856.7
4872.5
4789.8
4771.4
4341.1
4555.3
4620.3
4552.4		 8.7
10.9
12.9
15.1
17.3
19.6
21.6
25.8
34.5
43.2
51.9		 6405.6
6233.6
5760.8
5713.8
5732.4
5635.0
5613.4
5107.2
5359.2
5435.6
5355.8		 10.2
12.8
15.2
17.8
20.4
23.0
25.4
30.4
40.6
50.8
61.0		 13.0
16.0
19.0
22.0
26.0
29.0
32.0
38.0
51.0
64.0
76.0
50 25 64
76
89
102
115
127
152
203
254
305 		ISO450064
ISO450076
ISO450089
ISO450102
ISO450115
ISO450127
ISO450152
ISO450203
ISO450254
ISO450305 		709.0
572.0
475.0
405.0
352.0
316.0
239.0
187.0
153.0
127.0 		6806.4
6520.8
6341.3
6196.5
6072.0
6019.8
5449.2
5694.2
5829.3
5810.3 		9.6
11.4
13.4
15.3
17.3
19.1
22.8
30.5
38.1
45.8 		7713.9
7390.2
7186.8
7022.7
6881.6
6822.4
6175.8
6453.4
6606.5
6585.0 		10.9
12.9
15.1
17.3
19.6
21.6
25.8
34.5
43.2
51.9 		9075.2
8694.4
8455.0
8262.0
8096.0
8026.4
7265.6
7592.2
7772.4
7747.0 		12.8
15.2
17.8
20.4
23.0
25.4
30.4
40.6
50.8
61.0 		16.0
19.0
22.0
26.0
29.0
32.0
38.0
51.0
64.0
76.0
Hole
(A)		 Rod
(B)		 Free
Length
(C)		 Part
Number		 Load @
1 mM Def.
(N)		 Load
(N)		 Deflection
(15% of
Length)		 Load
(N)		 Deflection
(17% of
Length)		 Load
(N)		 Deflection
(20% of
Length)		 Max.
Deflection*
  For Optimum Life For Long Life Max. Operating Def.
* Theoretical limit. Not intended for operational use.