Springs - Boing Boing Boing - rates in different measures
|
N/mm
|
Kg/mm
|
lbs/inch
|
notes
|
3.33
|
0.34
|
19.0
|
|
3.53
|
0.36
|
20.2
|
|
3.73
|
0.38
|
21.3
|
|
3.92
|
0.40
|
22.4
|
|
4.60
|
0.47
|
26.3
|
|
|
6
|
.611
|
34.3
|
|
|
8
|
.815
|
45.7
|
|
|
10
|
1.019
|
57
|
|
|
12
|
1.22
|
69
|
|
|
14
|
1.43
|
80
|
|
|
16
|
1.63
|
94
|
|
|
18
|
1.84
|
103
|
|
|
20
|
2.04
|
114
|
|
|
21
|
2.14
|
120
|
|
|
22
|
2.24
|
125
|
|
|
23
|
2.35
|
132
|
|
|
24
|
2.45
|
137
|
|
|
25
|
2.55
|
143
|
|
|
26
|
2.65
|
149
|
|
|
28
|
2.85
|
160
|
|
|
30
|
3.06
|
171
|
|
|
32
|
3.26
|
183
|
|
|
34
|
3.46
|
194
|
|
|
36
|
3.67
|
206
|
|
|
38
|
3.87
|
217
|
|
|
40
|
4.08
|
228
|
|
|
42
|
4.28
|
240
|
|
|
44
|
4.48
|
251
|
|
|
46
|
4.69
|
263
|
|
|
48
|
4.89
|
274
|
|
|
50
|
5.10
|
286
|
|
|
52
|
5.30
|
297
|
|
|
54
|
5.50
|
308
|
|
|
56
|
5.71
|
320
|
|
|
58
|
5.91
|
331
|
|
|
60
|
6.11
|
343
|
|
|
62
|
6.32
|
354
|
|
|
64
|
6.52
|
365
|
|
|
66
|
6.73
|
377
|
|
|
68
|
6.93
|
388
|
|
|
70
|
7.13
|
400
|
|
|
75
|
7.64
|
428
|
|
|
80
|
8.15
|
457
|
|
|
85
|
8.66
|
485
|
|
|
90
|
9.17
|
514
|
|
|
95
|
9.68
|
542
|
|
|
100
|
10.19
|
571
|
|
|
105
|
10.70
|
600
|
|
|
110
|
11.21
|
628
|
|
what is a Newton?, what is an mm?, what is a Kg?, what
is an inch?, what is a lbs?
mm = millimeter
Kg = kilogram = 1000 grams
1.0 newton/mm(N/mm) = 5.710148 pound/inch(lb/in)
1.0 newton(N) = .1019716 Kg
1.0 newton/mm(N/mm) = .1019716 Kg/mm
1.0 lb/in = .1751268 newton/mm(N/mm)
dyne = 100,000 newtons
the following symbols are used in spring equations -
AC = Active coils
CL = compressed length
D = mean coil diameter=OD-d
d = diameter of wire
E = modulus of elasticity
FL = Free length, unloaded spring
N = number of active coils
P = load
TC = total coils
SH = solid height
p = pitch
formulas for compression springs, closed and ground ends
-
SH = TCxd
N = TC-2 or (FL-2d)/p
FL = (pxN)+2d
TC = ((FL-2d)/2)+P
i figured if you had a lot of time to waste, you could run calculations
on springs, until you were totally confused. have fun!