Heavy Duty (Gold) 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		 Box
Qty.		 Load @
0.1 Def.
(lbs)		 Load
(lbs)		 Deflection
(15% of
Length)		 Load
(lbs)		 Deflection
(20% of
Length)		 Load
(lbs)		 Deflection
(25% of
Length)		 Load
(lbs)		 Deflection
(30% of
Length)
3/8 3/16  1
1-1/4
1-1/2
1-3/4
2
2-1/2
3
12 		343-0604
343-0605
343-0606
343-0607
343-0608
343-0610
343-0612
343-0648 		200
200
100
100
100
100
100
50 		11.0
9.8
8.0
8.4
7.2
5.5
4.2
1.2 		16.5
18.4
18.0
22.1
21.6
20.6
18.9
21.6 		0.15
0.19
0.23
0.26
0.30
0.38
0.45
1.80 		22.0
24.5
24.0
29.4
28.8
27.5
25.2
28.8 		0.20
0.25
0.30
0.35
0.40
0.50
0.60
2.40 		27.5
30.6
30.0
36.8
36.0
34.4
31.5
36.0 		0.25
0.31
0.38
0.44
0.50
0.63
0.75
3.00 		33.0
36.8
36.0
44.1
43.2
41.3
37.8
43.2 		0.30
0.38
0.45
0.53
0.60
0.75
0.90
3.60
1/2 9/32 1
1-1/4
1-1/2
1-3/4
2
2-1/2
3
3-1/2
12		 343-0804
343-0805
343-0806
343-0807
343-0808
343-0810
343-0812
343-0814
343-0848		 100
100
100
100
100
50
50
50
50		 23.6
18.6
15.5
13.8
11.0
8.4
7.4
6.0
1.6		 35.4
34.9
34.9
36.2
33.0
31.5
33.3
31.5
28.8		 0.15
0.19
0.23
0.26
0.30
0.38
0.45
0.53
1.80		 47.2
46.5
46.5
48.3
44.0
42.0
44.4
42.0
38.4		 0.20
0.25
0.30
0.35
0.40
0.50
0.60
0.70
2.40		 59.0
58.1
58.1
60.4
55.0
52.5
55.5
52.5
48.0		 0.25
0.31
0.38
0.44
0.50
0.63
0.75
0.88
3.00		 70.8
69.8
69.8
72.5
66.0
63.0
66.6
63.0
57.6		 0.30
0.38
0.45
0.53
0.60
0.75
0.90
1.05
3.60
5/8 11/32 1
1-1/4
1-1/2
1-3/4
2
2-1/2
3
3-1/2
4
12 		343-1004
343-1005
343-1006
343-1007
343-1008
343-1010
343-1012
343-1014
343-1016
343-1048 		100
100
50
50
50
50
50
50
50
50 		42.4
29.6
27.2
24.0
20.8
17.0
14.4
12.2
10.8
3.0 		63.6
55.5
61.2
63.0
62.4
63.8
64.8
64.1
64.8
54.0 		0.15
0.19
0.23
0.26
0.30
0.38
0.45
0.53
0.60
1.80 		84.8
74.0
81.6
84.0
83.2
85.0
86.4
85.4
86.4
72.0 		0.20
0.25
0.30
0.35
0.40
0.50
0.60
0.70
0.80
2.40 		106.0
92.5
102.0
105.0
104.0
106.3
108.0
106.8
108.0
90.0 		0.25
0.31
0.38
0.44
0.50
0.63
0.75
0.88
1.00
3.00 		127.2
111.0
122.4
126.0
124.8
127.5
129.6
128.1
129.6
108.0 		0.30
0.38
0.45
0.53
0.60
0.75
0.90
1.05
1.20
3.60
3/4 3/8 1
1-1/4
1-1/2
1-3/4
2
2-1/2
3
3-1/2
4
4-1/2
5
5-1/2
6
12 		343-1204
343-1205
343-1206
343-1207
343-1208
343-1210
343-1212
343-1214
343-1216
343-1218
343-1220
343-1222
343-1224
343-1248 		50
50
50
50
50
50
50
50
50
50
50
50
50
50 		108.0
88.0
65.6
60.0
49.6
40.0
34.0
28.0
25.0
22.0
19.5
17.0
16.0
8.0 		162.0
165.0
147.6
157.5
148.8
150.0
153.0
147.0
150.0
148.5
146.3
140.3
144.0
144.0 		0.15
0.19
0.23
0.26
0.30
0.38
0.45
0.53
0.60
0.68
0.75
0.83
0.90
1.80 		216.0
220.0
196.8
210.0
198.4
200.0
204.0
196.0
200.0
198.0
195.0
187.0
192.0
192.0 		0.20
0.25
0.30
0.35
0.40
0.50
0.60
0.70
0.80
0.90
1.00
1.10
1.20
2.40 		270.0
275.0
246.0
262.5
248.0
250.0
255.0
245.0
250.0
247.5
243.8
233.8
240.0
240.0 		0.25
0.31
0.38
0.44
0.50
0.63
0.75
0.88
1.00
1.13
1.25
1.38
1.50
3.00 		324.0
330.0
295.2
315.0
297.6
300.0
306.0
294.0
300.0
297.0
292.5
280.5
288.0
288.0 		0.30
0.38
0.45
0.53
0.60
0.75
0.90
1.05
1.20
1.35
1.50
1.65
1.80
3.60
1 1/2 1
1-1/4
1-1/2
1-3/4
2
2-1/2
3
3-1/2
4
4-1/2
5
5-1/2
6
7
8
12 		343-1604
343-1605
343-1606
343-1607
343-1608
343-1610
343-1612
343-1614
343-1616
343-1618
343-1620
343-1622
343-1624
343-1628
343-1632
343-1648 		50
50
50
50
50
50
25
25
25
25
25
25
25
25
25
25 		208.0
171.2
118.4
104.0
90.0
68.0
54.4
45.6
40.0
35.2
31.2
28.8
25.6
22.4
19.2
12.0 		312.0
321.0
266.4
273.0
270.0
255.0
244.8
239.4
240.0
237.6
234.0
237.6
230.4
235.2
230.4
216.0 		0.15
0.19
0.23
0.26
0.30
0.38
0.45
0.53
0.60
0.68
0.75
0.83
0.90
1.05
1.20
1.80 		416.0
428.0
355.2
364.0
360.0
340.0
326.4
319.2
320.0
316.8
312.0
316.8
307.2
313.6
307.2
288.0 		0.20
0.25
0.30
0.35
0.40
0.50
0.60
0.70
0.80
0.90
1.00
1.10
1.20
1.40
1.60
2.40 		520.0
535.0
444.0
455.0
450.0
425.0
408.0
399.0
400.0
396.0
390.0
396.0
384.0
392.0
384.0
360.0 		0.25
0.31
0.38
0.44
0.50
0.63
0.75
0.88
1.00
1.13
1.25
1.38
1.50
1.75
2.00
3.00 		624.0
642.0
532.8
546.0
540.0
510.0
489.6
478.8
480.0
475.2
468.0
475.2
460.8
470.4
460.8
432.0 		0.30
0.38
0.45
0.53
0.60
0.75
0.90
1.05
1.20
1.35
1.50
1.65
1.80
2.10
2.40
3.60
1-1/4 5/8 1-1/2
1-3/4
2
2-1/2
3
3-1/2
4
4-1/2
5
5-1/2
6
7
8
10
12		 343-2006
343-2007
343-2008
343-2010
343-2012
343-2014
343-2016
343-2018
343-2020
343-2022
343-2024
343-2028
343-2032
343-2040
343-2048		 25
50
50
25
25
25
25
25
25
25
25
25
25
25
25		 212.0
181.6
149.6
117.6
95.2
75.2
66.4
58.4
53.0
47.2
42.4
36.8
32.8
25.6
20.8		 477.0
476.7
448.8
441.0
428.4
394.8
398.4
394.2
397.5
389.4
381.6
386.4
393.6
384.0
374.4		 0.23
0.26
0.30
0.38
0.45
0.53
0.60
0.68
0.75
0.83
0.90
1.05
1.20
1.50
1.80		 636.0
635.6
598.4
588.0
571.2
526.4
531.2
525.6
530.0
519.2
508.8
515.2
524.8
512.0
499.2		 0.30
0.35
0.40
0.50
0.60
0.70
0.80
0.90
1.00
1.10
1.20
1.40
1.60
2.00
2.40		 795.0
794.5
748.0
735.0
714.0
658.0
664.0
657.0
662.5
649.0
636.0
644.0
656.0
640.0
624.0		 0.38
0.44
0.50
0.63
0.75
0.88
1.00
1.13
1.25
1.38
1.50
1.75
2.00
2.50
3.00		 954.0
953.4
897.6
882.0
856.8
789.6
796.8
788.4
795.0
778.8
763.2
772.8
787.2
768.0
748.8		 0.45
0.53
0.60
0.75
0.90
1.05
1.20
1.35
1.50
1.65
1.80
2.10
2.40
3.00
3.60
1-1/2 3/4 2
2-1/2
3
3-1/2
4
4-1/2
5
5-1/2
6
7
8
10
12		 343-2408
343-2410
343-2412
343-2414
343-2416
343-2418
343-2420
343-2422
343-2424
343-2428
343-2432
343-2440
343-2448		 25
25
25
25
25
25
25
25
25
25
25
25
25		 190.4
155.0
130.0
106.4
91.2
78.4
71.2
64.0
58.4
49.6
43.2
34.4
28.8		 571.2
581.3
585.0
558.6
547.2
529.2
534.0
528.0
525.6
520.8
518.4
516.0
518.4		 0.30
0.38
0.45
0.53
0.60
0.68
0.75
0.83
0.90
1.05
1.20
1.50
1.80		 761.6
775.0
780.0
744.8
729.6
705.6
712.0
704.0
700.8
694.4
691.2
688.0
691.2		 0.40
0.50
0.60
0.70
0.80
0.90
1.00
1.10
1.20
1.40
1.60
2.00
2.40		 952.0
968.8
975.0
931.0
912.0
882.0
890.0
880.0
876.0
868.0
864.0
860.0
864.0		 0.50
0.63
0.75
0.88
1.00
1.13
1.25
1.38
1.50
1.75
2.00
2.50
3.00		 1142.4
1162.5
1170.0
1117.2
1094.4
1058.4
1068.0
1056.0
1051.2
1041.6
1036.8
1032.0
1036.8		 0.60
0.75
0.90
1.05
1.20
1.35
1.50
1.65
1.80
2.10
2.40
3.00
3.60
2 1 2-1/2
3
3-1/2
4
4-1/2
5
5-1/2
6
7
8
10
12 		343-3210
343-3212
343-3214
343-3216
343-3218
343-3220
343-3222
343-3224
343-3228
343-3232
343-3240
343-3248 		25
25
25
25
25
25
25
25
25
10
10
10 		260.0
200.0
170.0
150.0
120.0
110.0
100.0
94.0
82.0
73.0
55.0
42.0 		975.0
900.0
892.5
900.0
810.0
825.0
825.0
846.0
861.0
876.0
825.0
756.0 		0.38
0.45
0.53
0.60
0.68
0.75
0.83
0.90
1.05
1.20
1.50
1.80 		1300.0
1200.0
1190.0
1200.0
1080.0
1100.0
1100.0
1128.0
1148.0
1168.0
1100.0
1008.0 		0.50
0.60
0.70
0.80
0.90
1.00
1.10
1.20
1.40
1.60
2.00
2.40 		1625.0
1500.0
1487.5
1500.0
1350.0
1375.0
1375.0
1410.0
1435.0
1460.0
1375.0
1260.0 		0.63
0.75
0.88
1.00
1.13
1.25
1.38
1.50
1.75
2.00
2.50
3.00 		1950.0
1800.0
1785.0
1800.0
1620.0
1650.0
1650.0
1692.0
1722.0
1752.0
1650.0
1512.0 		0.75
0.90
1.05
1.20
1.35
1.50
1.65
1.80
2.10
2.40
3.00
3.60
Hole
(A)		 Rod
(B)		 Free
Length
(C)		 Part
Number		   Load @
0.1 Def.
(lbs)		 Load
(lbs)		 Deflection
(15% of
Length)		 Load
(lbs)		 Deflection
(20% of
Length)		 Load
(lbs)		 Deflection
(25% of
Length)		 Load
(lbs)		 Deflection
(30% of
Length)
  For Optimum Life For Long Life Max. Operating Def. Max. Deflection*
* Theoretical limit. Not intended for operational use.