Click Specification

Same specifications, different dimensions for other parts.

Cylindrical Coiled Compression Spring

GB /T 2089 - 2009

Display drawing:

Calculate weight and price. Weight 1000 pcs : kg x $ per kg = $ 1000 pcs

Default density g/cm³

Nominal Diameter
d

0.5

0.8

D	mean diameter of coil
Fn	working ultimate load
L	free height	n=2.5
		n=4.5
		n=6.5
		n=8.5
		n=10.5
		n=12.5
f	ultimate deflection	n=2.5
		n=4.5
		n=6.5
		n=8.5
		n=10.5
		n=12.5
Spring rate(N/mm)	n=2.5
	n=4.5
	n=6.5
	n=8.5
	n=10.5
	n=12.5
per 1000 units≈kg	n=2.5
	n=4.5
	n=6.5
	n=8.5
	n=10.5
	n=12.5

3	3.5	4	4.5	5	4	4.5	5	6	7	8	4.5	5	6	7	8
14	12	11	9.6	8.6	40	36	32	27	23	20	68	62	51	44	38
4	5	6	7	8	6	7	8	9	10	12	7	8	9	10	12
7	8	9	10	12	9	10	11	13	15	18	10	11	12	14	17
10	12	14	16	18	12	14	15	19	23	28	14	15	18	21	25
11	13	15	18	21	15	16	18	22	28	32	16	18	20	26	30
14	16	19	22	26	18	20	22	28	32	40	20	22	26	30	35
16	19	22	26	30	22	24	25	32	38	48	24	26	30	35	42
1.5	2.1	2.8	3.6	4.3	1.6	2	2.5	3.6	4.9	6.3	1.6	1.9	2.8	3.7	4.9
2.8	3.8	5.2	6.4	7.8	2.9	3.6	4.4	6.4	8.8	11	2.8	3.4	5.1	6.9	8.8
4	5.5	7.3	9.6	11	4.1	5.3	6.4	9.3	13	17	4	5.2	7.3	10	13
5.2	7.1	10	12	14	5.4	6.9	8.4	12	16	22	5.2	6.7	9.4	13	17
6.4	8.6	12	16	17	6.7	8.6	10	15	21	25	6.8	8.3	12	16	21
7.8	10	14	19	22	7.8	10	12	18	26	33	7.8	9.8	14	19	25
9.1	5.8	3.9	2.7	2	25	18	13	7.5	4.7	3.2	43	32	18	12	7.7
5.1	3.2	2.1	1.5	1.1	14	10	7.2	4.2	2.6	1.8	24	18	10	6.4	4.3
3.5	2.2	1.5	1	0.8	9.7	6.8	5	2.9	1.8	1.2	17	12	7	4.4	3
2.7	1.7	1.1	0.8	0.6	7.4	5.2	3.8	2.2	1.4	0.9	13	9.3	5.4	3.4	2.3
2.2	1.4	0.9	0.6	0.5	6	4.2	3.1	1.8	1.1	0.8	10	7.5	4.4	2.7	1.8
1.8	1.2	0.8	0.5	0.4	5.1	3.6	2.6	1.5	0.9	0.6	8.7	6.3	3.7	2.3	1.5
0.07	0.08	0.09	0.1	0.11	0.22	0.25	0.28	0.33	0.39	0.44	0.39	0.43	0.52	o.61	0.69
0.09	0.11	0.12	0.14	0.16	0.32	0.36	0.4	0.48	0.56	0.64	0.56	0.62	0.75	0.87	1
0.12	0.14	0.16	0.18	0.2	0.42	0.47	0.52	0.63	0.73	0.84	0.74	0.82	0.98	1.14	1.31
0.15	0.18	0.2	0.23	0.25	0.52	0.58	0.65	0.78	0.9	1.03	0.91	1.01	1.21	1.41	1.62
0.18	0.21	0.24	0.27	0.3	0.62	0.69	0.77	0.92	1.08	1.23	1.08	1.2	1.44	1.68	1.92
0.21	0.24	0.28	0.31	0.35	0.71	0.8	0.89	1.07	1.25	1.43	1.25	1.39	1.67	1.95	2.23

Nominal Diameter
d

1.2

1.4

1.6

D	mean diameter of coil
Fn	working ultimate load
L	free height	n=2.5
		n=4.5
		n=6.5
		n=8.5
		n=10.5
		n=12.5
f	ultimate deflection	n=2.5
		n=4.5
		n=6.5
		n=8.5
		n=10.5
		n=12.5
Spring rate(N/mm)	n=2.5
	n=4.5
	n=6.5
	n=8.5
	n=10.5
	n=12.5
per 1000 units≈kg	n=2.5
	n=4.5
	n=6.5
	n=8.5
	n=10.5
	n=12.5

9	10	6	7	8	9	10	12	7	8	9	10	12	14	8	9
34	31	86	74	65	58	52	43	114	100	89	80	67	57	145	129
13	15	9	10	11	12	14	17	10	11	12	13	16	19	11	12
20	22	12	14	16	20	24	26	15	16	18	20	24	30	17	19
29	3S	17	20	24	28	32	40	20	22	24	28	35	42	22	24
35	40	22	25	28	35	40	48	26	28	32	35	45	55	28	32
42	48	25	30	35	45	50	58	30	35	38	42	52	65	35	38
48	58	30	35	40	50	58	70	35	40	45	50	60	75	40	45
6.3	7.8	2.3	3.1	4.1	5.3	6.3	9.1	2.6	3.3	4.2	5.3	7.6	10	2.8	3.6
11	14	4.1	5.7	7.3	9.4	11	17	4.6	6.3	7.4	9.5	14	18	5.2	6.5
16	21	5.7	8	11	13	16	24	6.7	9.1	11	14	20	27	7.6	9.2
21	26	7.8	11	14	18	22	31	8.8	11	15	18	26	36	9.7	13
26	34	9.6	13	17	22	26	39	10	14	18	22	32	44	12	15
31	39	11	15	20	26	33	48	13	17	21	27	37	52	15	18
5.4	4	38	24	16	11	8.2	4.7	44	30	21	15	8.8	5.5	51	36
3	2.2	21	13	8.9	6.2	4.6	2.6	25	16	12	8.4	4.9	3.1	28	20
2.1	1.5	15	9.2	6.2	4.3	3.2	1.8	17	11	8	5.8	3.4	2.1	19	14
1.6	1.2	11	7	4.7	3.3	2.4	1.4	13	8.7	6.1	4.5	2.6	1.6	15	10
1.3	0.9	9	5.7	3.8	2.7	2	1.1	11	7.1	5	3.6	2.1	1.3	12	8.5
1.1	0.8	7.6	4.8	3.2	2.2	1.6	0.9	8.8	5.9	4.2	3	1.8	1.1	10	7.1
0.78	0.87	0.75	0.87	1	1.12	1.25	1.5	1.19	1.36	1.53	1.7	2.03	2.37	1.77	1.99
1.12	1.25	1.08	1.26	1.44	1.62	1.8	2.16	1.71	1.96	2.2	2.45	2.94	3.43	2.56	2.88
1.47	1.63	1.41	1.65	1.88	2.12	2.35	2.82	2.24	2.56	2.88	3.2	3.84	4.48	3.35	3.77
1.82	2.02	1.74	2.03	2.33	2.62	2.91	3.49	2.77	3.17	3.56	3.96	4.75	5.54	4.13	4.65
2.16	2.4	2.08	2.42	2.77	3.11	3.46	4.15	3.3	3.77	4.24	4.71	5.65	6.59	4.92	5.54
2.51	2.79	2.41	2.81	3.21	3.61	4.01	4.82	3.82	4.37	4.92	5.46	6.56	7.65	5.71	6.42

Nominal Diameter
d

1.6

1.8

D	mean diameter of coil
Fn	working ultimate load
L	free height	n=2.5
		n=4.5
		n=6.5
		n=8.5
		n=10.5
		n=12.5
f	ultimate deflection	n=2.5
		n=4.5
		n=6.5
		n=8.5
		n=10.5
		n=12.5
Spring rate(N/mm)	n=2.5
	n=4.5
	n=6.5
	n=8.5
	n=10.5
	n=12.5
per 1000 units≈kg	n=2.5
	n=4.5
	n=6.5
	n=8.5
	n=10.5
	n=12.5

10	12	14	16	9	10	12	14	16	18	10	12	14	16	18	20
116	97	83	73	179	161	134	115	101	90	215	179	153	134	119	107
13	15	18	22	13	15	16	18	20	22	13	15	17	19	22	24
20	24	28	36	18	20	24	28	32	38	20	24	26	30	35	40
28	32	40	48	25	28	32	38	45	52	28	32	38	42	48	55
35	42	50	60	32	35	40	48	60	65	35	40	50	55	65	75
42	50	60	70	38	40	50	58	70	80	40	48	55	65	75	90
48	60	70	85	42	48	58	70	80	95	48	58	65	75	90	105
4.5	6.5	8.8	12	3.1	3.9	5.6	7.7	10	13	3.4	4.8	6.7	8.9	11	14
8.3	12	16	21	5.6	7	10	14	18	23	6.1	9	12	16	20	24
12	17	23	30	8.1	10	15	20	26	33	9	13	17	23	28	36
15	22	30	38	11	13	19	26	34	43	11	16	23	30	37	47
19	27	38	49	13	16	24	32	42	53	14	21	28	31	46	56
22	32	44	56	16	19	28	38	51	64	17	25	33	43	54	67
26	15	9.4	6.3	57	41	Z4	15	10	7	63	37	23	15	11	7.9
14	8.3	5.2	3.5	32	23	13	8.4	5.6	4	35	20	13	8.6	6	4.4
10	5.8	3.6	2.4	22	16	9.2	5.8	3.9	2.7	24	14	8.9	5.9	4.2	3
7.6	4.4	2.8	1.9	17	12	7.1	4.4	3	2.1	19	11	6.8	4.5	3.2	2.3
6.2	3.6	2.2	1.5	14	9.9	5.7	3.6	2.4	1.7	15	8.1	5.5	3.7	2.6	1.9
5.2	3	1.9	1.3	11	8.3	4.8	3	2	1.4	13	7.3	4.6	3.1	2.2	1.6
2.21	2.66	3.1	3.54	2.52	2.8	3.36	3.92	4.49	5.05	3.46	4.15	4.85	5.54	6.23	6.92
3.2	3.84	4.48	5.12	3.64	4.05	4.86	5.67	6.48	7.29	5	6	7	8	9	10
4.18	5.02	5.86	6.69	4.77	5.29	6.35	7.41	8.47	9.53	6.54	7.84	9.15	10.46	11.77	13.07
5.17	6.2	7.24	8.27	5.89	6.54	7.85	9.16	10.47	11.77	8.08	9.69	11.31	12.92	14.54	16.15
6.15	7.38	8.61	9.84	7.01	7.79	9.34	10.9	12.46	14.02	9.61	11.54	13.46	15.38	17.3	19.23
7.14	8.56	9.99	11.42	8.13	9.03	10.84	12.65	14.45	16.26	11.15	13.38	15.61	17.84	20.07	22.3

Nominal Diameter
d

2.5

3.5

D	mean diameter of coil
Fn	working ultimate load
L	free height	n=2.5
		n=4.5
		n=6.5
		n=8.5
		n=10.5
		n=12.5
f	ultimate deflection	n=2.5
		n=4.5
		n=6.5
		n=8.5
		n=10.5
		n=12.5
Spring rate(N/mm)	n=2.5
	n=4.5
	n=6.5
	n=8.5
	n=10.5
	n=12.5
per 1000 units≈kg	n=2.5
	n=4.5
	n=6.5
	n=8.5
	n=10.5
	n=12.5

12	14	16	18	20	22	25	14	16	18	20	22	25	28	30	16
339	291	255	226	204	185	163	475	416	370	333	303	266	238	222	661
16	17	19	20	24	26	30	18	20	22	24	24	28	32	35	22
24	28	30	30	38	42	48	28	30	35	38	40	45	52	58	32
32	38	40	48	52	58	70	38	40	45	50	58	65	70	80	45
40	45	52	58	65	75	90	48	52	58	65	70	80	95	100	55
50	55	65	70	80	90	105	58	65	70	75	85	100	115	120	65
58	65	75	85	95	105	120	65	75	80	90	100	115	140	150	75
3.8	5.2	6.7	8.7	11	13	16	4.1	5.3	6.7	8.3	10	13	16	19	4.6
6.8	9.4	12	15	19	23	30	7.3	9.7	12	15	18	23	29	34	8.3
10	13	18	23	28	33	43	11	14	18	22	25	34	43	48	12
13	17	23	29	36	43	56	14	18	23	28	34	44	55	63	15
16	22	28	36	44	53	68	17	22	28	35	42	54	68	79	19
19	26	34	43	52	64	82	21	26	34	42	51	65	82	93	23
89	56	38	26	19	14	10	117	78	55	40	30	20	15	12	145
50	31	21	15	11	8.1	5.5	65	43	30	22	17	11	8.1	6.6	80
34	22	14	10	7.4	5.6	3.8	45	30	21	15	12	7.9	5.6	4.6	56
26	17	11	7.8	5.7	4.3	2.9	34	23	16	12	8.8	6	4.3	3.5	43
21	13	9	6.3	4.6	3.5	2.4	28	19	13	9.5	7.2	4.9	3.5	2.8	34
18	11	7.5	5.3	3.9	2.9	2	23	16	11	8	6	4.1	2.9	2.4	29
6.49	7.57	8.65	9.73	10.81	11.90	13.52	10.9	12.46	14.02	15.57	17.13	19.47	21.80	23.36	16.96
9.37	10.93	12.50	14.06	15.62	17.18	19.53	15.75	18	20.25	22.49	24.74	28.12	31.49	33.74	24.49
12.26	14.30	16.34	18.39	20.43	22.47	25.53	20.59	23.53	26.47	29.42	32.36	36.77	41.18	44.12	32.03
15.14	17.66	20.19	22.71	25.23	27.76	31.54	25.44	29.07	32.7	36.34	39.97	45.42	50.87	54.51	39.57
18.02	21.03	24.03	27.04	30.04	33.05	37.55	30.28	34.61	38.93	43.26	47.58	54.07	60.56	64.89	47.1
20.91	24.39	27.88	31.36	34.85	38.33	43.56	35.13	40.14	45.16	50.18	55.2	62.73	70.25	75.27	54.64

Nominal Diameter
d

3.5

D	mean diameter of coil
Fn	working ultimate load
L	free height	n=2.5
		n=4.5
		n=6.5
		n=8.5
		n=10.5
		n=12.5
f	ultimate deflection	n=2.5
		n=4.5
		n=6.5
		n=8.5
		n=10.5
		n=12.5
Spring rate(N/mm)	n=2.5
	n=4.5
	n=6.5
	n=8.5
	n=10.5
	n=12.5
per 1000 units≈kg	n=2.5
	n=4.5
	n=6.5
	n=8.5
	n=10.5
	n=12.5

18	20	22	25	28	30	32	35	20	22	25	28	30	32	35	38
587	528	480	423	377	352	330	302	764	694	611	545	509	477	436	402
22	24	26	28	32	35	38	40	26	28	30	34	36	37	41	46
35	38	40	45	50	55	60	65	38	40	45	50	55	58	65	70
48	50	55	65	70	75	80	90	52	55	60	70	75	80	90	100
58	65	70	80	90	95	105	115	65	70	80	90	95	100	115	130
70	75	85	95	110	115	130	140	80	85	95	105	115 57	120	140	150
80	90	100	110	130	140	150	170	90	100 37	110	130	140	150	160	180
5.8	7.1	8.6	11	14	16	18	22	6.1	7.3	9.4	12	14	15	18	22
10	13	15	20	25	29	33	39	11	13	17	21	24	28	34	40
15	19	23	28	38	42	47	57	16	19	24	30	36	40	48	57
20	24	30	38	48	54	62	74	21	25	32	39	46	52	63	74
24	29	37	47	59	68	11	92	25	30	41	50	57	65	78	91
29	35	44	56	70	80	92	108	30	37	47	59	68	77	93	109
102	74	56	38	27	22	18	14	126	95	65	46	37	31	24	18
56	41	31	21	15	12	10	7.7	70	53	36	26	21	17	13	10
39	28	21	15	10	8.4.	7	5.3	49	37	25	18	14	12	9.1	7.1
30	22	16	11	7.9	6.5	5.3	4.1	37	28	19	14	11	9.1	6.9	5.4
24	18	13	9	6.4	5.2	4.3	3.3	30	23	15	11	8.9	7.3	5.6	4.4
20	15	11	7.6	5.4	4.4	3.6	2.8	25	19	13	9.2	7.5	6.2	4.7	3.7
19.08	21.20	23.32	26.5	29.68	31.80	33.92	37.09	27.69	30.45	34.61	38.76	41.53	44.3	48.45	52.6
27.56	30.62	33.68	38.27	42.86	45.93	48.99	53.58	39.99	43.99	49.99	55.99	59.99	63.98	69.98	75.98
36.03	40.04	44.04	50.05	56.05	60.06	64.06	70.07	52.3	57.52	65.37	73.21	78.44	83.67	91.52	99.36
44.51	49.46	54.41	61.82	69.24	74.19	79.14	86.55	64.6	71.06	80.75	90.44	96.9	103.4	113.1	122.7
52.99	58.88	64.77	73.6	82.43	88.32	94.21	103	76.9	84.6	96.13	107.7	115.4	123	134.6	146.1
61.47	68.3	75.13	85.38	95.62	102.5	109.3	119.5	89.21	98.13	111.5	124.9	133.8	142.7	156.1	169.5

Nominal Diameter
d

4.5

D	mean diameter of coil
Fn	working ultimate load
L	free height	n=2.5
		n=4.5
		n=6.5
		n=8.5
		n=10.5
		n=12.5
f	ultimate deflection	n=2.5
		n=4.5
		n=6.5
		n=8.5
		n=10.5
		n=12.5
Spring rate(N/mm)	n=2.5
	n=4.5
	n=6.5
	n=8.5
	n=10.5
	n=12.5
per 1000 units≈kg	n=2.5
	n=4.5
	n=6.5
	n=8.5
	n=10.5
	n=12.5

40	22	25	28	30	32	35	38	40	45	25	28	30	32	35	38
382	988	870	777	725	680	621	572	544	483	1154	1030	962	902	824	759
48	28	30	32	36	31	40	44	48	54	30	32	35	38	40	42
75	42	48	50	52	58	60	65	70	85	48	52	55	58	60	65
105	58	60	70	75	75	85	90	100	120	65	70	75	80	85	90
142	70	80	85	90	100	105	110	130	150	80	90	95	100	110	120
160	85	95	105	110	120	130	145	160	180	100	105	115	120	130	140
190	100	110	120	130	140	150	160	190	220	115	120	130	140	150	170
24	6.5	8.4	11	12	14	16	19	22	27	7	9	11	12	14	17
43	12	15	19	22	25	30	36	39	48	13	17	19	21	26	30
63	17	22	28	32	36	41	52	56	71	19	24	27	31	37	44
83	22	29	35	40	45	56	66	74	93	25	31	36	41	48	58
101	27	35	43	52	57	69	82	91	115	30	38	44	50	59	69
119	33	41	52	60	69	52	97	107	134	36	47	53	60	69	84
16	152	104	74	60	49	38	30	25	18	158	112	91	75	58	45
8.8	85	58	41	33	27	21	16	14	10	88	62	51	42	32	25
6.1	59	40	28	23	19	15	11	9.7	6.8	61	43	35	29	22	17
4.6	45	30	22	18	15	11	8.7	7.4	5.2	46	33	27	22	17	13
3.8	36	25	18	14	12	9	7	6	4.2	38	27	22	18	14	11
3.2	30	21	15	12	9.9	7.6	5.9	5.1	3.6	32	22	18	15	12	9
55.37	38.54	43.8	49.06	52.56	56.06	61.32	66.58	70.08	78.84	54.07	60.56	64.89	69.21	75.7	82.19
79.98	55.67	63.27	70.86	75.92	80.98	88.57	96.16	101.2	113.9	78.11	87.48	93.73	99.98	109.3	118.7
104.6	72.8	82.73	92.66	99.28	105.9	115.8	125.8	132.4	148.9	102.1	114.4	122.6	130.7	143	155.3
129.2	89.9	102.2	114.5	122.6	130.8	143.1	155.3	163.5	184	126.2	141.3	151.4	161.5	176.6	191.8
153.8	107.1	121.7	136.3	146	155.7	170.3	184.9	194.7	219	150.2	168.2	180.2	192 .3	210.3	228.3
178.4	124.2	141.1	158.1	169.4	180.6	197.6	214.5	225.8	254	174.2	195.1	209.1	223	243.9	264.8

Nominal Diameter
d

D	mean diameter of coil
Fn	working ultimate load
L	free height	n=2.5
		n=4.5
		n=6.5
		n=8.5
		n=10.5
		n=12.5
f	ultimate deflection	n=2.5
		n=4.5
		n=6.5
		n=8.5
		n=10.5
		n=12.5
Spring rate(N/mm)	n=2.5
	n=4.5
	n=6.5
	n=8.5
	n=10.5
	n=12.5
per 1000 units≈kg	n=2.5
	n=4.5
	n=6.5
	n=8.5
	n=10.5
	n=12.5

40	45	50	30	32	35	38	40	45	50	55	60	32	35	38	40
721	641	577	1605	1505	1376	1267	1204	1070	963	876	803	3441	3146	2898	2753
45	50	55	38	38	40	42	45	48	52	58	65	45	47	49	50
70	80	95	55	58	60	65	70	75	85	95	105	70	72	76	78
100	115	130	75	80	85	90	95	105	120	130	150	90	96	98	100
130	140	170	95	100	105	115	120	140	150	170	190	110	115	122	128
150	180	200	115	120	130	140	140	160	190	200	240	150	14	140	150
180	200	240	130	140	150	160	170	190	220	240	280	155	160	170	180
18	24	29	8	10	12	14	15	19	23	28	33	7	8	10	11
34	43	52	15	17	21	24	27	35	42	52	62	13	15	18	20
48	64	76	22	25	30	35	39	49	60	73	88	18	22	26	28
66	80	99	29	33	39	47	50	63	80	97	115	24	28	33	37
18	99	123	36	41	4.9	58	63	82	98	120	143	29	35	41	46
93	118	144	42	49	57	67	75	97	117	141	171	35	42	49	54
39	27	20	190	156	119	93	80	56	41	31	24	494	377	295	253
21	15	11	105	87	66	52	44	31	23	17	13	274	210	164	140
15	10	7.6	73	60	46	36	31	22	16	12	9.1	190	145	113	97
11	8	5.8	56	46	35	27	24	17	12	9	7	145	111	87	74
9.2	6.5	4.7	45	37	28	22	19	13	9.8	7.3	5.6	118	90	70	60
7.7	5.4	4	38	31	24	19	16	11	8.2	6.2	4.7	99	75	59	51
86.52	97.33	108.1	93.44	99.67	109	118.4	124.6	140.2	155.7	171.3	186.9	177.2	193.8	210.4	221.5
125	140.6	156.2	135	144	157.5	171	180	202.5	224.9	247.4	269.9	255.9	279.9	303.9	319.9
163.4	183.9	204.3	176.5	188.3	205.9	223.6	235.3	264.7	294.2	323.6	353	334.7	366.1	397.4	418.4
201.9	227.1	252.3	218	232.6	254.4	276.2	290.7	327	363.4	399.7	436.1	413.4	452.2	491	516.8
240.3	270.4	300.4	259.6	276.9	302.8	328.8	346.1	389.3	432.6	475.8	519.1	492.2	538.3	584.5	615.2
278.8	313.6	348.5	301.1	321.2	351.3	381.4	401.4	451.6	501.8	552	602.2	570.9	624.5	678	713.7

Nominal Diameter
d

D	mean diameter of coil
Fn	working ultimate load
L	free height	n=2.5
		n=4.5
		n=6.5
		n=8.5
		n=10.5
		n=12.5
f	ultimate deflection	n=2.5
		n=4.5
		n=6.5
		n=8.5
		n=10.5
		n=12.5
Spring rate(N/mm)	n=2.5
	n=4.5
	n=6.5
	n=8.5
	n=10.5
	n=12.5
per 1000 units≈kg	n=2.5
	n=4.5
	n=6.5
	n=8.5
	n=10.5
	n=12.5

45	50	55	60	65	70	75	80	40	45	50	55	60	65	70	75
2447	2203	2002	1835	1694	1573	1468	1377	5181	4605	4145	3768	3454	3188	2961	2763
52	55	58	60	65	70	75	80	56	58	61	64	68	72	75	80
84	88	90	100	110	115	130	140	80	85	90	95	105	11O	115	120
105	115	130	140	150	160	180	190	11O	115	120	130	140	150	160	170
130	150	160	170	190	200	220	260	140	140	150	170	180	190	200	220
160	180	190	220	240	260	280	300	160	170	190	200	210	220	240	260
190	210	220	260	280	300	320	360	190	200	220	240	260	260	280	300
14	17	21	24	29	33	39	43	8	11	13	16	19	22	26	29
25	31	37	44	51	61	70	77	15	19	24	29	34	40	46	53
36	44	54	63	74	87	98	115	22	28	34	41	49	58	67	77
47	58	69	83	100	112	133	148	28	36	45	54	64	76	87	99
58	73	87	102	121	143	161	184	35	45	55	66	79	94	110	126
68	85	105	122	141	167	191	219	42	53	66	80	93	110	129	145
178	129	97	75	59	47	38	32	617	433	316	237	183	144	115	94
99	72	54	42	33	26	21	18	343	241	176	132	102	80	64	52
68	50	37	29	23	18	15	12	237	167	122	91	70	55	44	36
52	38	29	22	17	14	11	9.3	182	127	93	70	54	42	34	28
42	31	23	18	14	11	9.1	7.5	147	103	75	57	44	34	27	22
36	26	19	15	12	9.4	7.7	6.3	123	87	63	47	37	29	23	19
249.2	276.9	304.5	332.2	359.9	387.6	415.3	443	346.1	389.3	432.6	475.8	519.1	562.4	605.6	648.9
359.9	399.9	439.9	479.9	519.9	559.9	599.9	639.8	499.9	562.4	624.9	687.3	749.8	812.3	874.8	937.3
470.7	523	575.2	627.5	679.8	732.1	784.4	836.7	653.7	735.4	817.1	898.8	980.5	1062	1144	1226
581.4	646	710.6	775.2	839.8	904.4	969	1034	807.5	908.4	1009	1110	1211	1312	1413	1514
692.1	769	846	922.9	999.8	1077	1154	1230	961.3	1081	1202	1322	1442	1562	1682	1802
802.9	892.1	981.3	1071	1160	1249	1338	1427	1115	1255	1394	1533	1673	1812	1951	2091

Nominal Diameter
d

D	mean diameter of coil
Fn	working ultimate load
L	free height	n=2.5
		n=4.5
		n=6.5
		n=8.5
		n=10.5
		n=12.5
f	ultimate deflection	n=2.5
		n=4.5
		n=6.5
		n=8.5
		n=10.5
		n=12.5
Spring rate(N/mm)	n=2.5
	n=4.5
	n=6.5
	n=8.5
	n=10.5
	n=12.5
per 1000 units≈kg	n=2.5
	n=4.5
	n=6.5
	n=8.5
	n=10.5
	n=12.5

80	85	90	95	100	50	55	60	65	70	75	80	85	90	95	100
2591	2438	2303	2181	2072	6891	6264	5742	5301	4922	4594	4307	4053	3828	3627	3445
86	92	94	98	100	70	75	75	80	85	90	95	100	105	110	115
130	140	15O	160	170	105	110	120	130	130	140	150	160	170	180	190
180	190	200	220	240	140	150	160	170	180	190	200	220	240	240	260
240	255	270	280	300	180	190	200	220	230	240	260	280	300	320	340
280	300	320	340	360	220	230	240	260	280	300	320	340	360	380	420
340	360	380	400	420	260	260	280	300	320	340	380	400	420	450	480
34	38	43	47	52	11	13	15	18	21	24	27	30	34	38	42
60	68	77	84	94	19	23	27	32	37	43	48	55	62	68	75
86	98	110	121	138	27	33	39	46	54	61	69	79	89	98	108
113	128	144	156	173	36	43	51	60	70	81	92	104	116	130	144
144	163	177	198	220	44	54	64	75	86	100	113	127	142	158	172
173	188	210	237	262	53	64	76	88	103	118	135	152	174	191	215
77	64	54	45	40	655	492	379	298	239	194	160	133	112	96	82
43	36	30	26	22	364	274	211	166	133	108	89	74	62	53	46
30	25	21	18	15	252	189	146	115	92	75	62	51	43	37	32
23	19	16	14	12	193	145	112	88	70	57	47	39	33	28	24
18	15	13	11	9.4	156	117	90	71	57	46	38	32	27	23	20
15	13	11	9.2	7.9	131	98	76	60	48	39	32	27	22	19	16
692.1	735.4	778.7	821.9	865.2	622.9	685.2	747.5	809.8	872.1	934.4	996.7	1059	1121	1184	1246
999.5	1062	1125	1187	1250	900	990	1080	1170	1260	1350	1440	1530	1620	1710	1800
1307	1389	1471	1553	1634	1177	1294	1412	1530	1647	1765	1883	2000	2118	2236	2353
1615	1716	1817	1918	2019	1454	1599	1744	1890	2035	2180	2326	2471	2616	2762	2907
1923	2043	2163	2283	2403	1730	1903	2076	2249	2423	2596	2769	2942	3115	3288	3461
2230	2370	2509	2648	2788	2007	2208	2409	2609	2810	3011	3212	3412	3613	3814	4014

Nominal Diameter
d

D	mean diameter of coil
Fn	working ultimate load
L	free height	n=2.5
		n=4.5
		n=6.5
		n=8.5
		n=10.5
		n=12.5
f	ultimate deflection	n=2.5
		n=4.5
		n=6.5
		n=8.5
		n=10.5
		n=12.5
Spring rate(N/mm)	n=2.5
	n=4.5
	n=6.5
	n=8.5
	n=10.5
	n=12.5
per 1000 units≈kg	n=2.5
	n=4.5
	n=6.5
	n=8.5
	n=10.5
	n=12.5

110	120	60	65	70	75	80	85	90	95	100	110	120	130	65	70
3132	2871	10627	9809	9109	8501	7970	7501	7084	6712	6376	5796	5313	4905	14642	13596
130	140	82	85	90	95	105	11O	115	120	125	130	140	150	90	95
220	240	130	135	140	145	150	160	170	180	190	200	220	260	140	150
300	340	170	180	190	200	210	220	240	240	260	280	320	360	190	200
380	450	220	230	240	250	270	280	300	320	320	360	400	450	240	240
480	520	260	270	280	300	320	340	360	380	400	450	500	550	280	300
550	620	300	320	340	360	380	400	420	450	480	520	580	650	340	350
51	61	15	18	21	24	27	30	34	38	42	51	60	71	16	18
92	110	27	32	37	43	48	55	61	68	76	92	108	129	28	32
131	160	39	46	54	62	70	79	89	99	110	132	156	182	40	47
174	205	51	60	70	80	92	103	116	129	142	170	204	245	53	61
209	261	64	74	87	99	112	127	142	160	177	215	253	307	65	76
261	302	75	88	104	118	135	153	169	192	213	252	295	350	77	90
62	47	703	553	442	360	296	247	208	177	152	114	88	69	943	755
34	26	390	307	246	200	165	137	116	98	84	63	49	38	524	419
24	18	270	213	170	138	114	95	80	68	58	44	34	27	363	290
18	14	207	163	130	106	87	73	61	52	45	34	26	20	277	222
15	11	167	132	105	86	71	59	50	42	36	27	21	16	224	180
12	9.5	141	111	88	12	59	49	42	35	30	23	18	14	189	151
1370	1495	1017	1102	1187	1272	1357	1441	1526	1611	1696	1865	2035	2204	1440	1550
1980	2159	1470	1592	1715	1837	1960	2082	2204	2327	2449	2694	2939	3184	2080	2239
2589	2824	1922	2082	2242	2402	2562	2723	2883	3043	3203	3523	3844	4164	2719	2929
1198	3488	2374	2572	2770	2968	3165	3363	3561	3759	3957	4352	4748	5144	3359	3618
3807	4153	2826	3062	3297	3533	3768	4004	4239	4475	4710	5181	5653	6124	3999	4307
4416	4817	3278	3552	3825	4098	4371	4644	4918	5191	5464	6011	6557	7103	4639	4996

Nominal Diameter
d

D	mean diameter of coil
Fn	working ultimate load
L	free height	n=2.5
		n=4.5
		n=6.5
		n=8.5
		n=10.5
		n=12.5
f	ultimate deflection	n=2.5
		n=4.5
		n=6.5
		n=8.5
		n=10.5
		n=12.5
Spring rate(N/mm)	n=2.5
	n=4.5
	n=6.5
	n=8.5
	n=10.5
	n=12.5
per 1000 units≈kg	n=2.5
	n=4.5
	n=6.5
	n=8.5
	n=10.5
	n=12.5

75	80	85	90	95	100	110	120	130	140	150	75	80	85	90	95
12690	11897	11197	10575	10018	9517	8652	7931	7321	6798	6345	18068	16939	15943	15057	14264
100	100	105	110	115	120	130	140	150	160	180	105	105	110	115	120
150	160	165	170	180	190	200	220	240	260	300	160	160	170	180	185
210	220	230	240	250	260	280	320	340	380	400	220	230	240	250	260
260	260	280	300	320	320	360	400	450	480	520	260	280	290	300	320
320	320	340	360	380	400	450	480	520	580	650	320	340	350	360	380
360	380	400	420	450	480	520	580	620	680	750	380	400	410	420	450
21	24	27	30	33	37	45	53	62	72	82	18	21	24	26	29
37	42	48	54	60	66	80	96	113	131	148	33	38	43	48	53
54	61	69	77	86	95	115	137	163	189	212	48	54	61	69	77
71	80	90	102	113	125	152	180	209	243	276	63	71	80	90	100
87	99	112	124	139	154	188	220	261	309	352	77	88	99	112	124
103	118	133	149	167	183	222	264	305	358	423	92	105	118	132	147
614	506	422	355	302	259	194	150	118	94	77	983	810	675	569	484
341	281	234	197	168	144	108	83	65	52	43	546	450	375	316	269
236	194	162	137	116	100	75	58	45	36	30	378	311	260	219	186
180	149	124	104	89	76	57	44	35	28	23	289	238	199	167	142
146	120	100	85	72	62	46	36	28	22	18	234	193	161	135	115
123	101	84	71	60	52	39	30	24	19	15	197	162	135	114	97
1661	1772	1883	1993	2104	2215	2436	2658	2879	3101	3322	2102	2243	2383	2523	2663
2399	2559	2719	2879	3039	3199	3519	3839	4159	4479	4799	3037	3239	3442	3644	3847
3138	3347	3556	3765	3974	4184	4602	5020	5,439	5857	6275	3971	4236	4501	4765	5030
3876	4134	4393	4651	4910	5168	5685	6202	6718	7235	7752	4906	5233	5560	5887	6214
4614	4922	5230	5537	5845	6152	6768	7383	7998	8613	9229	5840	6229	6619	7008	7397
5353	5709	6066	6423	6780	7137	7850	8564	9278	9991	10705	6774	7226	7678	8129	8581

Nominal Diameter
d

D	mean diameter of coil
Fn	working ultimate load
L	free height	n=2.5
		n=4.5
		n=6.5
		n=8.5
		n=10.5
		n=12.5
f	ultimate deflection	n=2.5
		n=4.5
		n=6.5
		n=8.5
		n=10.5
		n=12.5
Spring rate(N/mm)	n=2.5
	n=4.5
	n=6.5
	n=8.5
	n=10.5
	n=12.5
per 1000 units≈kg	n=2.5
	n=4.5
	n=6.5
	n=8.5
	n=10.5
	n=12.5

100	11O	120	130	140	150	160	170	80	85	90	95	100	11O	120	130
13551	12319	11293	10424	9679	9034	8470	7971	23236	21869	20654	19567	18589	16899	15491	14299
120	130	140	150	160	170	190	200	115	120	130	140	150	160	170	180
190	200	220	240	260	280	300	340	170	180	190	200	210	220	230	240
270	280	300	340	360	400	420	480	240	250	260	270	280	290	300	340
340	360	400	420	450	500	550	600	300	310	320	330	340	360	400	420
400	450	480	520	550	620	680	720	350	360	380	400	420	450	480	520
480	520	550	620	650	720	800	850	400	420	450	460	480	520	550	600
33	39	47	55	64	73	84	95	19	21	24	27	29	36	42	50
59	71	85	99	115	133	151	170	34	38	43	48	53	64	76	89
85	103	123	143	167	192	217	249	49	55	62	69	76	92	110	129
111	134	159	186	220	251	282	319	64	72	81	90	100	121	143	168
137	166	198	232	269	312	353	399	79	89	100	111	124	150	178	210
163	199	235	274	323	361	426	469	94	106	119	133	148	178	212	247
415	312	240	189	151	123	101	84	1234	1029	867	737	632	475	366	288
230	173	133	105	84	68	56	47	686	572	482	410	351	264	203	160
159	120	92	73	58	47	39	32	475	396	333	284	243	183	141	111
122	92	71	56	44	36	30	25	363	303	255	217	186	140	108	85
99	74	57	45	36	29	24	20	294	245	206	176	150	113	87	68
83	62	48	38	30	25	20	17	247	206	173	147	126	95	73	58
2803	3084	3364	3644	3924	4205	4485	4765	2786	2960	3135	3309	3483	3831	4179	4528
4049	4454	4859	5264	5669	6074	6478	6883	4025	4276	4528	4779	5031	5534	6037	6540
5295	5824	6354	6883	7413	7942	8472	9001	5263	5592	5921	6250	6579	7237	7895	8552
6541	7195	7849	8503	9157	9811	10465	11119	6460	6864	7268	7671	8075	8883	9690	10498
7787	8565	9344	10123	10901	11680	12459	13237	7690	8171	8652	9132	9613	10574	11536	12497
9032	9936	10839	11742	12645	13549	14452	15355	8921	9479	10036	10594	11151	12266	13381	14497

Nominal Diameter
d

D	mean diameter of coil
Fn	working ultimate load
L	free height	n=2.5
		n=4.5
		n=6.5
		n=8.5
		n=10.5
		n=12.5
f	ultimate deflection	n=2.5
		n=4.5
		n=6.5
		n=8.5
		n=10.5
		n=12.5
Spring rate(N/mm)	n=2.5
	n=4.5
	n=6.5
	n=8.5
	n=10.5
	n=12.5
per 1000 units≈kg	n=2.5
	n=4.5
	n=6.5
	n=8.5
	n=10.5
	n=12.5

140	150	160	170	180	190	100	110	120	130	140	150	160	170	180	190
13278	12393	11618	10935	10327	9784	36306	33006	30255	27928	25933	24204	22691	21357	20170	19109
190	200	205	210	220	230	140	150	160	160	170	180	190	200	210	220
260	280	300	320	340	380	220	230	240	260	270	280	300	320	340	360
360	380	420	450	480	520	300	310	320	340	360	380	420	450	450	500
450	500	520	580	620	680	360	380	400	420	450	500	520	550	600	620
550	600	650	700	750	850	420	460	500	520	550	600	620	680	720	780
650	700	780	850	900	950	520	550	580	620	650	700	750	800	850	880
58	66	75	85	96	106	24	28	34	40	46	53	60	68	76	85
104	119	135	154	172	192	42	51	61	72	83	95	109	123	137	153
149	172	197	223	246	280	61	74	88	103	120	138	156	177	198	220
195	225	258	288	323	362	80	97	115	135	157	181	204	232	263	290
241	275	314	353	397	445	99	120	142	167	193	222	252	285	320	354
289	335	375	421	469	544	117	142	169	199	232	266	303	339	381	425
230	187	154	129	108	92	1543	1159	893	702	562	457	377	314	265	225
128	104	86	71	60	51	857	644	496	390	312	254	209	174	147	125
89	72	59	49	42	35	593	446	343	270	216	176	145	121	102	87
68	55	45	38	32	27	454	341	263	207	165	134	111	92	78	66
55	45	31	31	26	22	367	276	213	167	134	109	90	75	63	54
46	37	31	26	22	18	309	232	179	140	112	91	75	63	53	45
4876	5224	5573	5921	6269	6618	5407	5948	6489	7030	7570	8111	8652	9193	9733	10274
7043	7546	8049	8552	9056	9559	7811	8592	9373	10154	10935	11716	12497	13278	14059	14840
9210	9868	10526	11184	11842	12500	10214	11235	12257	13278	14300	15321	16342	17364	18385	19406
11305	12113	12920	13728	14535	15343	12617	13879	15141	16402	17664	18926	20188	21449	22711	23973
13458	14420	15381	16342	17304	18265	15020	16523	18025	19527	21029	22531	24033	25535	27037	28539
15612	16727	17842	18957	20072	21187	17424	19166	20909	22651	24393	26136	27878	29620	31363	33105

Nominal Diameter
d

D	mean diameter of coil
Fn	working ultimate load
L	free height	n=2.5
		n=4.5
		n=6.5
		n=8.5
		n=10.5
		n=12.5
f	ultimate deflection	n=2.5
		n=4.5
		n=6.5
		n=8.5
		n=10.5
		n=12.5
Spring rate(N/mm)	n=2.5
	n=4.5
	n=6.5
	n=8.5
	n=10.5
	n=12.5
per 1000 units≈kg	n=2.5
	n=4.5
	n=6.5
	n=8.5
	n=10.5
	n=12.5

200	220	120	130	140	150	160	170	180	190	200	220	240	260	140	150
18153	16503	52281	48259	44812	41825	39211	36904	34854	33020	31369	28517	26141	24130	71160	66416
240	260	170	180	185	190	210	220	230	240	250	260	280	300	200	210
380	450	260	280	290	300	310	320	340	360	380	420	450	500	300	320
520	580	340	360	380	400	420	450	460	480	520	580	62O	700	400	420
680	750	450	460	480	500	520	550	580	620	650	720	800	900	500	520
800	850	520	550	580	620	650	680	720	750	800	900	920	980	620	650
900	950	620	650	680	720	750	800	850	880	910	950	-	-	720	740
94	114	28	33	38	44	50	57	63	71	78	95	113	133	33	38
170	204	51	60	69	79	90	102	114	127	141	171	203	239	59	68
245	295	73	86	100	115	131	148	165	184	204	246	294	345	86	98
318	384	96	113	131	150	170	192	216	241	266	324	384	447	112	128
395	472	119	139	161	185	211	238	266	297	330	396	475	561	138	159
465	569	141	166	192	220	251	284	317	355	392	475	-	-	165	189
193	145	1852	1456	1166	948	781	651	549	466	400	300	231	182	2160	1756
107	81	1029	809	648	527	434	362	305	259	222	167	129	101	1200	976
74	56	712	560	448	365	300	250	211	179	154	116	89	70	831	675
57	43	545	428	343	279	230	192	161	137	118	88	68	54	635	517
46	35	441	347	278	226	186	155	131	111	95	72	55	43	514	418
39	29	370	291	233	190	156	130	110	93	80	60	-	-	432	351
10815	11896	9404	10187	10971	11755	12538	13322	14106	14889	15673	17240	18808	20375	14933	16000
15621	17183	13583	14715	15847	16979	18111	19243	20375	21507	22639	24903	27167	29431	21570	23111
20428	22471	17763	19243	20723	22204	23684	25164	Dec-72	28124	29605	32565	35526	38486	28207	30221
25234	27758	21942	23771	25599	27428	29256	31085	32913	34742	36570	40228	43885	47542	34844	37332
30041	33045	26122	28299	30475	32652	34829	37006	39183	41359	43536	47890	52244	56597	41480	44443
34848	38332	30301	32826	35351	37877	40402	42927	45452	47977	50502	55552	-	-	48117	51554

Nominal Diameter
d

D	mean diameter of coil
Fn	working ultimate load
L	free height	n=2.5
		n=4.5
		n=6.5
		n=8.5
		n=10.5
		n=12.5
f	ultimate deflection	n=2.5
		n=4.5
		n=6.5
		n=8.5
		n=10.5
		n=12.5
Spring rate(N/mm)	n=2.5
	n=4.5
	n=6.5
	n=8.5
	n=10.5
	n=12.5
per 1000 units≈kg	n=2.5
	n=4.5
	n=6.5
	n=8.5
	n=10.5
	n=12.5

160	170	180	190	200	220	240	260	280	300	160	170	180	190	200	220
62265	58603	55347	52434	49812	45284	41510	38317	35580	33208	92944	87477	82617	78269	74355	67596
230	235	240	250	260	270	280	300	320	360	220	230	240	250	260	280
330	340	360	370	380	420	450	480	520	580	340	360	370	380	400	420
450	460	480	500	520	580	620	680	720	800	460	480	500	520	520	580
550	580	600	620	650	720	780	850	900	950	580	600	620	650	680	720
680	700	120	750	800	850	880	950	-	-	700	720	740	760	780	820
760	780	820	850	880	950	-	-	-	-	780	820	840	860	900	950
43	49	54	61	67	81	97	114	132	151	38	43	48	53	59	71
77	87	98	109	121	147	174	205	237	272	68	77	86	96	106	128
112	126	142	158	175	212	252	295	342	395	98	110	124	138	153	185
146	165	185	206	228	276	329	387	450	514	128	145	162	180	200	242
180	204	229	255	283	340	407	479	-	-	158	179	200	223	247	299
215	243	273	303	337	408	-	-	-	-	188	212	238	265	294	356
1447	1206	1016	864	741	557	429	337	210	220	2469	2058	1734	1474	1264	950
804	670	565	480	412	309	238	187	150	122	1372	1143	963	819	702	528
557	464	391	332	285	214	165	130	104	84	950	792	667	567	486	365
426	355	299	254	218	164	126	99	79	65	726	605	510	434	372	279
345	287	242	206	176	133	102	80	-	-	588	490	413	351	301	226
289	241	203	173	148	111	-	-	-	-	494	412	347	295	253	190
17066	18133	19200	20266	21333	23466	25599	27733	29866	31999	22149	23533	24917	26301	27686	30454
24651	26192	27733	29273	30814	33895	36977	40058	43140	46221	31992	33992	35991	37991	39991	43990
32236	34251	36266	38280	40295	44325	48354	52384	56413	60443	41836	44451	47066	49681	52295	57525
39821	42310	44799	47288	49776	54754	59732	64709	69687	74665	52011	55262	58513	61763	65014	71516
47406	50369	53332	56295	59258	65184	71109	77035	-	-	61918	65788	69658	73528	77398	85138
54991	58428	61865	65302	68739	75613	-	-	-	-	71825	76314	80803	85292	89782	98760

Nominal Diameter
d

D	mean diameter of coil
Fn	working ultimate load
L	free height	n=2.5
		n=4.5
		n=6.5
		n=8.5
		n=10.5
		n=12.5
f	ultimate deflection	n=2.5
		n=4.5
		n=6.5
		n=8.5
		n=10.5
		n=12.5
Spring rate(N/mm)	n=2.5
	n=4.5
	n=6.5
	n=8.5
	n=10.5
	n=12.5
per 1000 units≈kg	n=2.5
	n=4.5
	n=6.5
	n=8.5
	n=10.5
	n=12.5

240	260	280	300	320	180	190	200	220	240	260	280	300	320	340	200
61963	57196	53111	49570	46472	117632	111441	105869	96245	88224	81438	75621	70579	66168	62276	145225
290	300	320	340	380	260	270	275	280	290	300	320	320	340	380	280
450	480	520	550	600	360	360	280	400	440	450	500	520	550	600	450
620	680	720	780	850	480	500	520	550	580	650	680	720	780	850	580
750	780	850	900	950	640	660	680	100	740	800	840	900	-	-	720
850	950	-	-	-	720	750	780	850	950	-	-	-	-	-	850
-	-	-	-	-	880	950	-	-	-	-	-	-	-	-	-
85	99	115	132	150	42	47	52	63	75	88	102	118	134	151	47
153	179	207	238	272	76	85	94	114	136	159	184	212	241	272	85
221	259	300	344	391	110	123	136	165	196	230	266	306	348	392	122
288	338	393	450	512	144	160	178	215	256	301	348	401	-	-	160
356	417	-	-	-	178	198	220	266	316	-	-	-	-	-	198
-	-	-	-	-	212	236	-	-	-	-	-	-	-	-	-
731	575	461	375	309	2777	2361	2025	1521	1172	922	738	600	494	412	3086
406	320	256	208	171	1543	1312	1125	845	651	512	410	333	275	229	1714
281	221	177	144	119	1068	908	779	585	451	354	284	231	190	159	1187
215	169	135	110	91	817	695	595	447	345	271	217	176	-	-	908
174	137	-	-	-	661	562	482	362	279	-	-	-	-	-	735
-	-	-	-	-	555	472	-	-	-	-	-	-	-	-	-
33223	35991	38760	41529	44297	31738	33501	35264	38791	42317	45844	49370	52897	56423	59949	43536
41989	51988	55987	59986	63985	45844	48391	50937	56031	61125	66219	71312	76406	81500	86594	62886
62754	67984	73213	78443	83673	59949	63280	66611	73272	79933	86594	93255	99916	106577	113238	82235
78017	84518	91020	97521	104023	74055	78169	82284	90512	98740	106969	115197	123425	-	-	111743
92877	99976	-	-	-	88161	93059	97957	107752	117548	-	-	-	-	-	133028
-	-	-	-	-	102267	107948	-	-	-	-	-	-	-	-	-

Nominal Diameter
d

D	mean diameter of coil
Fn	working ultimate load
L	free height	n=2.5
		n=4.5
		n=6.5
		n=8.5
		n=10.5
		n=12.5
f	ultimate deflection	n=2.5
		n=4.5
		n=6.5
		n=8.5
		n=10.5
		n=12.5
Spring rate(N/mm)	n=2.5
	n=4.5
	n=6.5
	n=8.5
	n=10.5
	n=12.5
per 1000 units≈kg	n=2.5
	n=4.5
	n=6.5
	n=8.5
	n=10.5
	n=12.5

220	240	260	280	300	320	340	200	220	240	260	280	300	320	340	200
132023	121021	111712	103732	96817	90766	85426	193294	175722	161079	148688	138067	128863	120809	113703	193294
300	320	320	340	360	380	400	310	330	350	370	390	410	430	450	350
450	480	500	550	580	600	620	460	480	500	520	540	560	580	600	480
620	650	680	720	780	820	850	610	640	670	700	730	750	790	830	620
780	800	850	-	-	-	-	200	220	240	260	280	300	-	-	200
880	950	-	-	-	-	-	740	780	800	860	900	950	-	-	760
-	-	-	-	-	-	-	900	950	-	-	-	-	-	-	-
57	68	80	92	106	121	136	43	52	62	72	84	96	110	124	30
103	122	143	166	191	217	245	77	93	111	130	151	173	197	223	54
148	176	207	240	275	313	353	111	135	160	188	218	250	285	321	79
194	230	270	-	-	-	-	193294	175722	161079	148688	138067	128863	-	-	193294
239	285	-	-	-	-	-	145	176	209	246	285	327	-	-	103
-	-	-	-	-	-	-	180	217	-	-	-	-	-	-	-
2319	1786	1405	1125	914	753	628	4518	3395	2615	2056	1647	1339	1103	920	6399
1288	992	780	625	508	419	349	2510	1886	1453	1142	915	744	613	511	3555
892	687	540	433	352	290	242	1738	1306	1006	791	633	515	424	354	2461
682	525	413	-	-	-	-	-	-	-	-	-	-	-	-	-
552	425	-	-	-	-	-	1329	998	769	605	484	394	-	-	1882
-	-	-	-	-	-	-	1076	808	-	-	-	-	-	-	-
47890	52244	56597	60951	65304	69658