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Coil Spring

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AFAL AM AH AB AR  

AR Mold

AR Mold
Spiral pattern molds – Features of the AR size

1. The maximum deviation is calculated at 60%, which is the same as that of the free field. Durability
    in this case is calculated as 300,000 times repeated compressions.
2. When the deviation of the free field is 50%, durability is 1 million times repeated compressions.
3. At a temperature of 200°C the decrement of the free field is 2% (when 50% of it is used)
4. The AR size is classified as seven scales, which are further divided into a total of seventy-one kinds.

 

Tolerance
Pin dia.
Outer-
dia.(mm)
Inner-
dia.(mm)
Free
Length(mm)
Cail
Direction
Squa
reness
Load
(kgf/mm)
Solid
Length(mm)
8∮
14.5
+0
-0.4
9
+0.4
-0
50 below ±0.5
55 beyond ±2%
Right
2。below
±10%
±0
10∮
17
+0
-0.6
11
+0.6
-0
Right
12∮
21
+0
-0.8
13
+0.8
-0
Right
16∮
26
+0
-1
16.5
+1
-0
Right
20∮
32
+0
-1
21
+1
-0
Right
25∮
39
+0
-1
26
+1
-0
Right
30∮
46
+0
-1.2
32
+1.2
-0
Right


Outside diametral at the time of tightness
AR 14.5
AR 17
AR 21
AR 26
AR 32
AR 39
AR 46
+0.15
+0.1
+0.1
+0.15
+0.2
+0.26
+0.4

Model
Outer
dia.(mm)
Inner
dia.(mm)
Free
Length(mm)
Spring Const
(kgf/mm)
Deflection
(mm)
Load
kgf(N)
Solid
Length(mm)
AR 14.5×20
14.5
9
20
1.10
1.10
13
(127.5)
8
25
25
0.88
12.5
10
30
30
0.73
15.0
12
35
35
0.63
17.0
14
40
40
0.55
20.0
16
45
45
0.49
22.5
18
50
50
0.44
25.0
20
55
55
0.40
27.5
22
60
60
0.37
30.0
24
65
65
0.34
32.5
26
70
70
0.31
35.0
28
75
75
0.29
37.0
30
80
80
0.28
40.0
32
90
90
0.24
45.0
36
100
100
0.22
50.0
40
125
125
0.18
62.5
50
 
 
Model
Outer
dia.(mm)
Inner
dia.(mm)
Free
Length(mm)
Spring Const
(kgf/mm)
Deflection
(mm)
Load
kgf(N)
Solid
Length(mm)
AR 17×25
17
               
11
               
25
1.52
12.5
20
(196.1)
               
10
30
30
1.27
15.0
12
35
35
1.09
17.5
14
40
40
0.95
20.0
16
45
45
0.84
22.5
18
50
50
0.76
25.0
20
55
55
0.69
27.5
22
60
60
0.63
30.0
24
65
65
0.58
32.5
26
70
70
0.54
35.0
28
75
75
0.51
37.5
30
80
80
0.48
40.0
32
90
90
0.42
45.0
36
100
100
0.38
50.0
40
125
125
0.30
62.5
50
150
150
0.25
75.0
60
AR 21×30
21
13
30
1.40
15.0
30
(294.1)
12
35
35
1.20
17.5
14
40
40
1.05
20.0
16
45
45
0.93
22.5
18
50
50
0.84
25.0
20
55
55
0.76
27.5
22
60
60
0.70
30.0
24
65
65
0.65
32.5
26
70
70
0.60
35.0
28
75
75
0.56
37.5
30
80
80
0.53
40.0
32
90
90
0.47
45.0
36
100
100
0.42
50.0
40
125
125
0.34
62.5
50
150
150
0.28
75.0
60
AR 26×30
26
16.5
30
2.73
15.0
40
(392.3)
12
35
35
2.34
17.5
14
40
40
2.05
20.0
16
45
45
1.82
22.5
18
50
50
1.64
25.0
20
55
55
1.49
27.5
22
60
60
1.37
30.0
24
65
65
1.26
32.5
26
70
70
1.17
35.0
28
75
75
1.09
37.5
30
80
80
1.03
40.0
32
90
90
0.91
45.0
36
100
100
0.82
50.0
40
110
110
0.75
55.0
44
125
125
0.66
62.5
50
150
150
0.55
75.0
60
175
175
0.47
87.5
70
200
200
0.41
100.0
80
 
 
Model
Outer
dia.(mm)
Inner
dia.(mm)
Free
Length(mm)
Spring Const
(kgf/mm)
Deflection
(mm)
Load
kgf(N)
Solid
Length(mm)
AR 32×40
32
               
21
               
40
2.55
20.0
51
(500)
16
45
45
2.27
22.5
18
50
50
2.04
25.0
20
60
60
1.70
30.0
24
70
70
1.46
35.0
28
80
80
1.28
40.0
32
90
90
1.13
45.0
36
100
100
1.02
50.0
40
110
110
0.93
55.0
44
125
125
0.83
62.5
50
150
150
0.68
75.0
60
175
175
0.58
87.5
70
200
200
0.51
100.0
80
250
250
0.41
125.0
100
300
300
0.34
150.0
120
AR 39×40
39
26
40
2.75
20.0
63.2
(619.7)
16
45
45
2.44
22.5
18
50
50
2.20
25.0
20
60
60
1.83
30.0
24
70
70
1.57
35.0
28
80
80
1.38
40.0
32
90
90
1.22
45.0
36
100
100
1.10
50.0
40
110
110
1.00
55.0
44
125
125
0.88
62.5
50
150
150
0.73
75.0
60
175
175
0.63
87.5
70
200
200
0.55
100.0
80
250
250
0.44
125.0
100
300
300
0.37
150.0
120
AR 46×50
46
32
50
2.48
25.0
110
(1078.7)
20
60
60
2.04
30.0
24
70
70
1.77
35.0
28
80
80
1.55
40.0
32
90
90
1.38
45.0
36
100
100
1.24
50.0
40
110
110
1.13
55.0
44
125
125
0.99
62.5
50
150
150
0.83
75.0
60
175
175
0.71
87.5
70
200
200
0.62
100.0
80
250
250
0.50
125.0
100
300
300
0.41
150.0
120


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