Contact Tips; Gas Cups - Lincoln Electric COBRAMAX IM774 Operator's Manual

Contact Tips

Heavy Duty Contact Tip - 3/8" Diameter*
Wire Size Tip ID
.030" (0.8mm) .040" (1.0mm) Spray 1.57" (39.9mm) 621-0390-25
.035" (0.9mm) .045" (1.1mm) Spray 1.57" (39.9mm) 621-0391-25
.035" (0.9mm) .045" (1.1mm) Short 1.82" (46.2mm) 621-0397-25
.045" (1.1mm) .054" (1.37mm) Short 1.82" (46.2mm) 621-0398-25
3/64" (1.2mm) .054" (1.37mm) Spray 1.57" (39.9mm) 621-0392-25
(5356 Alloy)
3/64" (1.2mm) .060" (1.5mm)
(4043 Alloy)
1/16" (1.6mm) .074" (1.9mm) Spray 1.57" (39.9mm) 621-0394-25
.085" (2.16mm) Spray
*
Use of tip removal tool is recommended
**This size tip furnished with gun
Spring Loaded Tips
The use of the Spring Loaded Tips has shown to improve wire to tip
contact significantly, especially while welding aluminum in DC Pulse Mode.
Incorporating a wrap-around spring material, a ceramic "puck" pushes up
against the wire forcing the wire to make 100% positive contact with the
internal face of the contact tip.
The constant touching of the wire to the tip eliminates "electrical gaps" in the
welding voltage sensing loop, which many welding power sources utilize for
sensing arc voltage values.
Spring Loaded Contact Tip - 3/8" Diameter*
Wire Size Tip ID
.030" (0.8mm) .040" (1.0mm) Spray 1.57" (39.9mm)
.035" (0.9mm) .045" (1.1mm) Spray 1.57" (39.9mm)
3/64" (1.2mm) .054" (1.37mm) Spray 1.57" (39.9mm)
3/64" (1.2mm) .060" (1.5mm) Spray 1.57" (39.9mm)
1/16" (1.6mm) .074" (1.9mm) Spray 1.57" (39.9mm)
*
Use of tip removal tool is recommended

Gas Cups

Cup Size
No. 6 3/8" (9.5mm)
No. 8* 1/2" (15.8mm)
No. 10 5/8" (15.8mm)
*standard - furnished with gun
CobraMAX™ Owner's Manual - Page 5
Arc Tip Length
Short 1.82" (46.2mm) 621-0396-25
Spray 1.57" (39.9mm) 621-0393-25** KP2217-4B1
Also sold in quantities of 250
†
Also sold in quantities of 500
† †
Arc Tip Length
Gas Cups
Cup I.D. MK P/N
621-0420
621-0421
621-0422
MK Part No LE Part No
KP2217-1B1
--
KP2217-2B1
621-0391-250
†
621-0391-500
††
--
--
KP2217-3B1
621-0392-250
†
621-0392-500
††
621-0393-250
†
621-0393-500
††
KP2217-5B1
621-0395-25
MK Part No LE Part No
621-0331 KP2662-1
621-0332 KP2662-2
621-0333 KP2662-3
621-0334 KP2662-4
621-0335 KP2262-5
LE P/N
KP2249-1
KP2250-1
KP2251-1