Lincoln Electric SPIRIT II 275 Technical Manual page 90

Section 5: Torch Consumables and Cutting Charts
H17 Plasma / Nitrogen Shield / Nitrogen Preflow & Postflow
This gas combination gives the best cut quality and minimum dross levels
Shield Cap
BK277298
Outer Cap
BK284150
Imperial*
Material
Preflow
Thickness
(in) (psi)
1/4
3/8
1/2 25
5/8
3/4
Metric*
Material
Preflow
Thickness
(mm) (psi)
10
12
25
16
20
Marking* – For All Material Thicknesses
Type of Gas Preflow
(Plasma) (Shield) (psi)
Nitrogen Nitrogen N/A
Argon Nitrogen N/A
WARNING Do not connect H17 (combustible gas) as an input gas (Pre/Postflow, Plasma, or Shield) at the same time as
Oxygen or Air.
* Use an arc transfer height (ignition height) of .200" (5.1 mm) for cutting and .100" (2.5 mm) for marking.
(Revised 04/26/2013)
This information is subject to the controls of the Export Administration Regulations [EAR]. This information shall not be provided to
non-U.S. persons or transferred by any means to any location outside the United States contrary to the requirements of the EAR.
Stainless Steel - 150 Amps - Copper Electrode
(H17 = 17.5% Hydrogen / 32.5% Argon / 50% Nitrogen)
Nozzle
BK277297
Retaining Cap
BK277266
Plasma Shield Postflow
(psi) (psi) (psi)
77 75 81
Plasma Shield Postflow
(psi) (psi) (psi)
77 75 81
Plasma Shield Postflow
(psi) (psi) (psi)
25 25 N/A
50 25 N/A
Electrode
BK277135
Swirl Ring
BK277139
Arc Travel Cutting
Voltage Speed Height
(volts) (ipm)
95 .250
75 .150
165 60 .165
50 .185
40 .250
Arc Travel Cutting
Voltage Speed Height
(volts) (mm/m) (mm)
1845
155 1610
1260
167 940
Arc Travel
Voltage Speed
(volts) (ipm) (mm/min)
135 250 6350
81 100 2540
5-28
Spirit II User's Manual
Torch Head
BK279100
Pierce Pierce
Height Time
(in) (in) (msec)
.250 400
.275 500
.300 600
.325 800
.350 1200
Pierce Pierce
Height Time
(mm) (msec)
3.8 7.0
600
4.1 7.4
4.7 8.3 800
6.9 9.0 1200
Marking Initial
Height Height
(in) (mm) (in) (mm) (msec)
.100 2.5 .100 2.5
.140 3.6 .100 2.5
Kerf
Width
(in)
.135
.140
.145
Kerf
Width
(mm)
3.4
3.6
3.7
Pierce
Time
0
0