Thanks to; Attila Kokeny for the European manufacturers,
Messer and CGE Rhona. They are not exactly the same sizes as the US
tips they are aligned with, but close enough for comparison. He also provided the Welding Thickness/Tip Size chart.
Aaron Novak supplied the #6, #7 and 1/2 size Meco Midget tip sizes.
Peter F. informs me that in Australia the big name in gas welding equip. is CIG. Their tip sizes, 6 thru 32, correspond to 0.6 to 3.2mm orifces.
Far too logical.
Welding Thickness
|
Tip Size
|
Inches
|
mm
|
Drill Size
|
Inches
|
mm
|
1/64
|
0.38
|
76
|
0.020
|
0.51
|
1/32
|
0.78
|
72
|
0.025
|
0.64
|
1/16
|
1.59
|
68
|
0.031
|
0.79
|
3/32
|
2.38
|
62
|
0.038
|
0.96
|
1/8
|
3.18
|
56
|
0.047
|
1.19
|
3/16
|
4.76
|
54
|
0.055
|
1.40
|
¼
|
6.35
|
51
|
0.067
|
1.70
|
5/16
|
7.94
|
48
|
0.076
|
1.93
|
3/8
|
9.53
|
44
|
0.086
|
2.18
|
½
|
12.70
|
40
|
0.098
|
2.49
|
5/8
|
15.88
|
35
|
0.110
|
2.79
|
¾
|
19.05
|
30
|
0.128
|
3.25
|
Welding vs. Brazing
High gas velocities are important when welding.
So you need to match the tip size to the
material/joint.
Brazing bicycle frames is different. Some builders, myself included, will build an entire
frame, from fillets to braze ons, with a single, large tip. Just by
varying gas flow with the valves. (Maybe using a bit more
pressure than my usual 4-5psi for larger fillets.)
I own every tip ever made for the Smith's AW1A ,
but I could get along just fine with just an AW205, which is big enough to weld 1/8" steel.
Other builders get good results using a tip as small as an AW201 for
braze ons.
|
Wire
Drill
|
Decimal
Inch
|
Smiths
AW1A |
Little
Torch
|
Harris
|
Victor
|
Meco
Midget
|
Messer
|
GCE
Rhona
|
Metric
Eqiv.
|
97
|
0.0059
|
|
#2
|
|
|
|
|
|
0.15
|
85
|
0.011
|
|
#3
|
|
|
|
|
|
0.279
|
80
|
0.0135
|
|
|
|
|
#00
|
|
|
0.343
|
76
|
0.02
|
AW200
|
#4
|
|
|
0
|
00
|
00
|
0.508
|
75
|
0.022
|
|
|
0
|
#000
|
|
|
|
0.559
|
74
|
0.0225
|
AW20
|
|
|
|
|
0
|
0
|
0.572
|
73
|
|
|
|
|
|
0.5
|
|
|
0.572
|
71
|
0.026
|
AW201
|
|
1
|
|
|
1
|
1
|
0.66
|
70
|
0.028
|
|
|
|
#00
|
1
|
|
|
0.711
|
69
|
0.0292
|
AW202
|
#5
|
|
|
|
2
|
2
|
0.742
|
67
|
0.032
|
AW203
|
|
|
|
1.5
|
|
|
0.813
|
65
|
0.035
|
|
|
2
|
0
|
2
|
|
|
0.889
|
63
|
0.037
|
AW204
|
#6
|
|
|
2.5
|
|
2E
|
0.94
|
60
|
0.04
|
|
|
|
1
|
|
|
|
1.016
|
58
|
0.042
|
|
|
3
|
|
3
|
|
|
1.067
|
57
|
0.043
|
AW205
|
|
|
|
|
|
|
1.092
|
Wire
Drill
|
Decimal
Inch
|
Smiths
AW1A |
Little
Torch
|
Harris
|
Victor
|
Meco
Midget
|
Messer
|
GCE
Rhona
|
Metric
Eqiv.
|
56
|
0.0465
|
AW206
|
#7
|
|
2
|
4
|
3
|
3
|
1.181
|
55
|
0.052
|
|
|
4
|
|
|
|
|
1.321
|
54
|
0.055
|
AW207
|
|
|
|
4.5
|
3.5
|
3E
|
1.397
|
53
|
0.0595
|
|
|
5
|
3
|
|
|
|
1.511
|
52
|
0.0635
|
AW208
|
|
|
|
5
|
4
|
4
|
1.613
|
51
|
0.067
|
|
|
6
|
|
|
|
|
1.702
|
49
|
0.073
|
AW209
|
|
|
4
|
5.5
|
|
4E
|
1.854
|
48
|
0.076
|
|
|
7
|
|
|
|
|
1.93
|
47
|
0.076
|
|
|
|
|
6
|
|
|
1.93
|
45
|
0.082
|
|
|
8
|
|
|
|
|
2.083
|
44
|
0.086
|
AW210
|
|
|
|
|
5
|
5
|
2.184
|
43
|
0.089
|
|
|
9
|
5
|
|
|
|
2.261
|
42
|
|
|
|
|
|
7
|
|
|
2.261
|
40
|
0.098
|
|
|
10
|
|
|
|
|
2.489
|
36
|
0.106
|
|
|
|
6
|
|
|
|
2.692
|
35
|
0.11
|
|
|
13
|
|
|
|
|
2.794
|
Wire
Drill
|
Decimal
Inch
|
Smiths
AW1A |
Little
Torch
|
Harris
|
Victor
|
Meco
Midget
|
Messer
|
GCE
Rhona
|
Metric
Eqiv.
|
|