Lincoln Electric LA-9, LA-26V, LA-17V manual Typical Current Ranges For Tungsten Electrodes

CHART 4 — Select tungsten diameter and alumina nozzle based on current and application.

TYPICAL CURRENT RANGES FOR TUNGSTEN ELECTRODES (1)

		DCEN (-)		DCEP (+)					AC
					Balanced Wave					Unbalanced Wave
Tungsten		Pure and		Pure and			1%, 2%					1%, 2%
Electrode		1%, 2%		1%, 2%			Thoriated					Thoriated		Alumina
Diameter		Thoriated		Thoriated	Pure		Tungsten			Pure		Tungsten		Nozzle
in. (mm)		Tungsten		Tungsten	Tungsten		Zirconiated			Tungsten		Zirconiated		Size
0.020	(0.5)	5-	20	(2)	10-	20	5-	20		5-	15	5-	20	4, 5, 6
0.040	(1.0)	15-	80	(2)	20-	30	20-	60		10-	60	15-	80	4, 5, 6
1/16	(1.6)	70-	150	10-20	30-	80	60- 120			50- 100		70- 150		5, 6
3/32	(2.4)	150-	250	15-30	60- 130		100- 180			100- 160		140- 235		6, 7, 8
1/8	(3.2)	250-	400	25-40	100- 180		160- 250			150- 210		225- 325		6, 7, 8
5/32	(4.0)	400-	500	40-55	160- 240		200- 320			200- 275		300- 400		8, 10

(1)With argon gas.

(2)DCEP (+) is not commonly used in these sizes.

CHART 5 — Select Collet/Collet Body or Gas Lens Collet Body (requires insulator) based on tungsten diameter and application.

Tungsten						Gas Lens
Electrode		Collet		Collet Body		Collet Body
Diameter		Part No.		Part No.		Part No.
in. (mm)		(Industry Ref.)		(Industry Ref.)		(Industry Ref.)
0.020 (0.5)		S19498-1	(10N21)	S19500-1	(10N29)	S19502-1	(45V29)
0.040 (1.0)		S19498-2	(10N22)	S19500-2	(10N30)	S19502-2	(45V24)
1/16	(1.6)	S19498-3	(10N23)	S19500-3	(10N31)	S19502-3	(45V25)
3/32	(2.4)	S19498-4	(10N24)	S19500-4	(10N32)	S19502-4	(45V26)
1/8	(3.2)	S19498-5	(10N25)	S19500-5	(10N28)	S19502-5	(45V27)
5/32	(4.0)	S19498-6	(54N20)	S19500-6	(406488)	S19502-6	(45V28)

CHART 6 (Alumina Gas Nozzle) — Select alumina gas nozzle orifice size based on application.

Standard gas nozzle, 1-27/32” (46.8mm) long, or gas lens, 1-5/8” (41.2mm) long.(1)

Nozzle Orifice		Size	Standard Nozzle	Gas Lens
Diameter		(16th of	Part No.	Part No.
in. (mm)		an inch)	(Industry Ref.)	(Industry Ref.)
1/4	(6)	4	S19367-6	S19369-5
			(10N50)	(54N18)
5/16	(8)	5	S19367-5	S19369-4
			(10N49)	(54N17)
3/8	(10)	6	S19367-4	S19369-3
			(10N48)	(54N16)
7/16	(11)	7	S19367-3	S19369-2
			(10N47)	(54N15)
1/2	(12.5)	8	S19367-2	S19369-1
			(10N46)	(54N14)
5/8	(16)	10	S19367-1	—
			(10N45)
11/16	(17)	Short	—	S19369-6(2))
				(54N19)(2)

(1)Size “short” is 1-1/8” (28.5mm) long.

(2)Not recommended for use with high frequency current.