Contact Tips

Heavy Duty Contact Tip - 3/8" Diameter*

Wire Size

Tip ID

Arc

 

Tip Length

MK Part No

LE Part No

.030” (0.8mm)

.040” (1.0mm)

Spray

 

1.57” (39.9mm)

621-0390-25

KP2217-1B1

 

 

Short

 

1.82” (46.2mm)

621-0396-25

--

.035” (0.9mm)

.045” (1.1mm)

Spray

 

1.57” (39.9mm)

621-0391-25

KP2217-2B1

 

 

 

 

 

621-0391-250†

 

 

 

 

 

 

621-0391-500††

 

.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

KP2217-3B1

(5356 Alloy)

 

 

 

 

621-0392-250†

 

 

 

 

 

 

621-0392-500††

 

3/64” (1.2mm)

.060” (1.5mm)

Spray

1.57” (39.9mm)

621-0393-25**

KP2217-4B1

(4043 Alloy)

 

 

 

 

 

 

 

 

 

 

 

621-0393-250†

 

 

 

 

 

 

621-0393-500††

 

1/16” (1.6mm)

.074” (1.9mm)

Spray

1.57” (39.9mm)

621-0394-25

KP2217-5B1

 

.085” (2.16mm)

Spray

 

 

621-0395-25

 

*Use of tip removal tool is recommended

† Also sold in quantities of 250

 

**This size tip furnished with gun

 

† † Also sold in quantities of 500

 

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

Arc

Tip Length

MK Part No

LE Part No

.030” (0.8mm)

.040” (1.0mm)

Spray

1.57” (39.9mm)

621-0331

KP2662-1

.035” (0.9mm)

.045” (1.1mm)

Spray

1.57” (39.9mm)

621-0332

KP2662-2

3/64” (1.2mm)

.054” (1.37mm)

Spray

1.57” (39.9mm)

621-0333

KP2662-3

3/64” (1.2mm)

.060” (1.5mm)

Spray

1.57” (39.9mm)

621-0334

KP2662-4

1/16” (1.6mm)

.074” (1.9mm)

Spray

1.57” (39.9mm)

621-0335

KP2262-5

*Use of tip removal tool is recommended

Gas Cups

Gas Cups

Cup Size

Cup I.D.

MK P/N

LE P/N

No. 6

3/8" (9.5mm)

621-0420

KP2249-1

No. 8*

1/2" (15.8mm)

621-0421

KP2250-1

No. 10

5/8" (15.8mm)

621-0422

KP2251-1

*standard - furnished with gun

CobraMAX™ Owner's Manual - Page

Page 14 Page 16
Page 15
Image 15
Lincoln Electric IM774 manual Contact Tips, Spring Loaded Tips, Gas Cups
Page 14 Page 16

IM774 specifications

Lincoln Electric IM774 is a state-of-the-art industrial MIG (Metal Inert Gas) welding machine designed to cater to the demanding needs of professional welders and fabrication shops. This model is known for its versatility, efficiency, and the innovative technologies incorporated into its design, making it a preferred choice for numerous welding applications.

One of the standout features of the Lincoln Electric IM774 is its impressive output range, which allows welders to work with various materials, including steel, stainless steel, and aluminum. This machine can deliver a maximum output of 300 amperes, making it suitable for heavy-duty welding tasks, as well as finer work. Moreover, the IM774 supports different wire sizes, enhancing its adaptability and making it a go-to option for different welding projects.

The IM774 employs advanced inverter technology, which contributes to its compact and lightweight design while maintaining high welding performance. This technology allows for better energy efficiency and reduced operational costs compared to traditional transformer-based machines. The inverter also ensures a more stable arc, resulting in superior weld quality, fewer defects, and reduced spatter.

In addition to its robust performance features, the IM774 comes equipped with several user-friendly functions. The machine features an intuitive digital control panel that provides precise adjustments for wire feed speed and voltage settings. This simplicity in operation allows both novice and experienced welders to achieve optimal results without extensive training.

Safety and durability are paramount in the design of the IM774. The machine is built with a rugged frame that can withstand the rigors of the shop environment. Integrated safety features, including thermal overload protection and a built-in gas solenoid valve, ensure the safe operation of the machine, minimizing risks associated with prolonged use.

Another notable characteristic of the Lincoln Electric IM774 is its compatibility with automated systems. Welders can easily integrate this machine into robotic welding setups or use it for semi-automated welding applications, showcasing its flexibility across various industries.

In conclusion, the Lincoln Electric IM774 MIG welding machine stands out due to its high-performance output, advanced inverter technology, user-friendly controls, and robust safety features. Its combination of adaptability, efficiency, and quality makes it an ideal choice for professionals seeking reliable and high-quality welding solutions.
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