КAs we all know dart mainly used in sports consist of four parts - flight , shaft, barrel and point. What’s more ,tungsten barrel forms the main part of a dart. Nowadays tungsten alloy barrel billet is widely used as the standard barrel materials,(tungsten heavy alloy WNiFe or copper tungsten WCu) for it has a specific gravity of 19.3 ,making it a very dense materials with small volum. plus superior wearing resistance ,well machinability, etc , that’s why tungsten alloy material contribute to a good dart barrel.
|
Billet Size
[DIA.(+0.05);L(+1.0)mm] |
Content of W (%)
|
||||||||
|---|---|---|---|---|---|---|---|---|---|
|
65
|
70
|
75
|
80
|
85
|
90
|
95
|
|||
|
Density (+/-0.25g/cc)
|
|||||||||
|
13.20
|
13.90
|
14.60
|
15.40
|
16.00
|
16.90
|
18.00
|
|||
|
No
|
inch
|
mm
|
Weight (+/-0.50g/pc)
|
||||||
|
1
|
Ø0.222×2.2
|
Ø5.65×56.0
|
18.82
|
19.81
|
20.79
|
21.63
|
22.75
|
24.16
|
25.56
|
|
2
|
Ø0.236×2.0
|
Ø6.00×50.8
|
19.25
|
20.25
|
21.26
|
22.12
|
23.27
|
24.71
|
26.14
|
|
3
|
Ø0.236×2.15
|
Ø6.00×54.6
|
20.67
|
21.75
|
22.83
|
23.75
|
24.99
|
26.53
|
28.07
|
|
4
|
Ø1/4×1.7
|
Ø6.35×43.2
|
18.35
|
19.31
|
20.26
|
21.08
|
22.18
|
23.55
|
24.91
|
|
5
|
Ø1/4×1.8
|
Ø6.35×45.7
|
19.39
|
20.41
|
21.42
|
22.29
|
23.44
|
24.89
|
26.34
|
|
6
|
Ø1/4×1.9
|
Ø6.35×48.3
|
20.48
|
21.55
|
22.62
|
23.54
|
24.76
|
26.29
|
27.82
|
|
7
|
Ø1/4×1.93
|
Ø6.35×49.0
|
20.77
|
21.86
|
22.94
|
23.88
|
25.12
|
26.67
|
28.22
|
|
8
|
Ø1/4×2.0
|
Ø6.35×50.8
|
21.53
|
22.65
|
23.78
|
24.74
|
26.03
|
27.64
|
29.24
|
|
9
|
Ø1/4×2.15
|
Ø6.35×54.6
|
23.11
|
24.32
|
25.53
|
26.57
|
27.95
|
29.68
|
31.41
|
|
10
|
Ø0.265×1.7
|
Ø6.73×43.2
|
20.57
|
21.65
|
22.73
|
23.65
|
24.88
|
26.41
|
27.95
|
|
11
|
Ø0.265×1.8
|
Ø6.73×45.7
|
21.75
|
22.89
|
24.02
|
25.00
|
26.30
|
27.92
|
29.55
|
|
12
|
Ø0.265×1.9
|
Ø6.73×48.3
|
22.97
|
24.17
|
25.37
|
26.40
|
27.78
|
29.49
|
31.21
|
|
13
|
Ø0.265×2.0
|
Ø6.73×50.8
|
24.14
|
25.41
|
26.67
|
27.75
|
29.20
|
31.01
|
32.81
|
|
14
|
Ø0.265×2.15
|
Ø6.73×54.6
|
25.93
|
27.28
|
28.64
|
29.81
|
31.36
|
33.30
|
35.24
|
|
15
|
Ø9/32×1.6
|
Ø7.15×40.7
|
21.86
|
23.00
|
24.15
|
25.13
|
26.43
|
28.07
|
29.70
|
|
17
|
Ø9/32×1.65
|
Ø7.15×42.0
|
22.55
|
23.73
|
24.91
|
25.92
|
27.27
|
28.95
|
30.64
|
|
17
|
Ø9/32×1.7
|
Ø7.15×43.2
|
23.18
|
24.40
|
25.61
|
26.65
|
28.04
|
29.77
|
31.51
|
|
18
|
Ø9/32×1.8
|
Ø7.15×45.7
|
24.51
|
25.79
|
27.08
|
28.18
|
29.64
|
31.48
|
33.31
|
|
19
|
Ø9/32×1.9
|
Ø7.15×48.3
|
25.89
|
27.24
|
28.60
|
29.76
|
31.31
|
33.25
|
35.19
|
|
20
|
Ø9/32×2.0
|
Ø7.15×50.8
|
27.21
|
28.64
|
30.06
|
31.29
|
32.92
|
34.96
|
37.00
|
|
21
|
Ø9/32×2.08
|
Ø7.15×53.0
|
28.38
|
29.86
|
31.35
|
32.63
|
34.33
|
36.46
|
38.59
|
|
22
|
Ø9/32×2.15
|
Ø7.15×54.6
|
29.22
|
30.76
|
32.29
|
33.61
|
35.36
|
37.55
|
39.74
|
|
23
|
Ø0.295×1.7
|
Ø7.5×43.2
|
25.48
|
26.81
|
28.15
|
29.29
|
30.82
|
32.73
|
34.64
|
|
24
|
Ø5/16×1.6
|
Ø7.94×40.7
|
26.89
|
28.30
|
29.71
|
30.92
|
32.53
|
34.54
|
36.56
|
|
25
|
Ø5/16×1.7
|
Ø7.94×43.2
|
28.52
|
30.02
|
31.51
|
32.80
|
34.51
|
36.64
|
38.78
|
|
26
|
Ø5/16×1.8
|
Ø7.94×45.7
|
30.15
|
31.74
|
33.32
|
36.63
|
36.49
|
38.75
|
41.01
|
|
27
|
Ø5/16×1.9
|
Ø7.94×48.3
|
31.85
|
33.53
|
35.20
|
36.63
|
38.55
|
40.94
|
43.33
|
|
28
|
Ø5/16×2.0
|
Ø7.94×50.8
|
33.49
|
35.25
|
37.01
|
38.51
|
40.52
|
43.04
|
45.55
|
|
29
|
Ø5/16×2.04
|
Ø7.94×52.0
|
34.27
|
36.07
|
37.87
|
39.42
|
41.48
|
44.05
|
46.62
|
|
30
|
Ø11/32×1.4
|
Ø8.74×35.6
|
28.48
|
29.97
|
31.47
|
32.75
|
34.46
|
36.59
|
38.73
|
|
31
|
Ø11/32×1.6
|
Ø8.74×40.7
|
32.52
|
34.22
|
35.93
|
37.40
|
39.35
|
41.79
|
44.23
|
|
32
|
Ø11/32×1.8
|
Ø8.74×45.7
|
36.47
|
38.39
|
40.31
|
41.95
|
44.15
|
46.89
|
49.63
|
|
33
|
Ø11/32×2.0
|
Ø8.74×50.8
|
10.51
|
42.64
|
44.77
|
46.60
|
49.04
|
52.09
|
55.13
|
