Doc No. 740124
10
MODEL
9 SERIES WELD HEAD
OPERATION MANUAL
7.0 ELECTRODE GEOMETRY & INSTALLATION
(cont’d.)
Use this chart to determine the weld head Rotor O.D.
Model
Rotor O.D.
9-750
2.00” (50.8mm)
9-1500
3.187” (80.9mm)
9E-1500
2.687” (68.25mm)
9-1500 w/elect. extender
2.031” (51.6mm)
9-2500
4.380” (111.25mm)
9E-2500
4.280” (108.71mm)
9-2500 w/elect. extender
3.156” (80.16mm)
9-3500
5.380” (136.65mm)
9E-3500
5.310” (134.87mm)
9-3500 w/elect. extender
4.031” (102.38mm)
9-4500
6.875” (174.62mm)
9E-4500
6.280” (159.51mm)
9ER-4500
5.776” (146.71mm)
9-4500 w/elect. extender
4.920” (124.97mm)
9-7500
10.440” (265.18mm)
9E-7500
9.375” (238.12mm)
9-7500 w/elect. extender
8.280” (210.31mm)
Fig. 8
Use this chart to establish an appropriate Arc Gap and Electrode Tip diameter
Tube/Pipe Wall
Thickness
Recommended
Arc Gap
Recommended Tip
Diameter
0.020”–0.035” (.5 –1.0mm)
0.020”-0.030” (0.5-0.8mm)
0.010”-0.20” (.25-.50mm)
0.035”-0.085” (1.0-2.1mm)
0.050”-0.070” (1.3-1.8mm)
0.030” (0.8mm)
0.091”-0.154” (2.3-3.9mm)
0.070”-0.090” (1.8-2.3mm)
0.040” (1.0mm)
Fig. 9
Use this chart to determine the electrode diameter.
Tube/Pipe
Wall thickness
Electrode
Diameter
0.020” – 0.035” (.50 – 1.0mm)
0.040” or 1/16” (1.0 or 1.6mm)
0.049” – 0.083” (1.2 – 2.1mm)
1/16” (1.6mm)
0.091” – 0.154” (2.3 – 3.9mm)
3/32” (2.3mm)
Fig. 10
