Miller Welding 안전 퀵 매뉴얼 - 페이지 14

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Miller Welding 안전 퀵 매뉴얼
Safety Quick-Guide

8. Lens Shade Selector Guide

Operation/Process
Shielded metal arc
welding (SMAW)
Gas metal arc
welding (GMAW) and
flux cored arc
welding (FCAW)
Gas tungsten arc
welding (GTAW)
Air carbon arc cutting
(CAC−A)
Plasma arc welding
(PAW)
Plasma arc cutting
(PAC)
Torch brazing (TB)
Torch soldering (TS)
Carbon arc welding
(CAW)
Oxyfuel gas welding
(OFW)
Light
Medium
Heavy
Oxygen Cutting (OC)
Light
Medium
Heavy
* As a rule of thumb, start with a shade that is too dark to see the weld or cut zone. Then go to a lighter shade
which gives sufficient view of the weld or cut zone without going below the minimum. In oxyfuel gas welding,
cutting, or brazing where the torch produces a high yellow light, it is desirable to use a filter lens that absorbs
the yellow or sodium line in the visible light of the (spectrum) operation.
Guide adapted from ANSI Z49.1, 1999.
Low Current Plasma arc cutting data (0−80 Amperes) supplied by Miller Electric Mfg. Co.
Electrode Size
in. (mm)
Less than 3/32 (2.5)
3/32−5/32 (2.5−4)
5/32−1/4 (4−6.4)
More than 1/4 (6.4)
(Light)
(Heavy)
Plate thickness
in.
Under 1/8
1/8 to 1/2
Over 1/2
Under 1
1 to 6
Over 6
Arc Current
(Amperes)
Less than 60
60−160
160−250
250−550
Less than 60
60−160
160−250
250−550
Less than 50
50−150
150−500
Less than 500
500−1000
Less than 20
20−100
100−400
400−800
Less than 20
20−40
40−60
60−80
80−300
300−400
400−800
—
—
—
mm
Under 3.2
3.2 to 12.7
Over 12.7
Under 25
25 to 150
Over 150
Page 13
Minimum
Suggested*
Protective
Shade No.
Shade
(Comfort)
7
—
8
10
10
12
11
14
7
—
10
11
10
12
10
14
8
10
8
12
10
14
10
12
11
14
6
6 to 8
8
10
10
12
11
14
4
5
6
8
8
9
12
10
14
—
3 or 4
—
—
14
4 or 5
5 or 6
6 or 8
3 or 4
4 or 5
5 or 6
4
5
6
8
9
2