Medium Duty MIG Welding Gun
Magnum® PRO 250L Welding Gun
A photograph shows the Lincoln Electric Magnum PRO 250L welding gun, a black and silver MIG welding torch with a curved, flexible gooseneck and a red trigger assembly. The handle features a textured, over-molded rubber grip.
Key Features
The Magnum PRO 250L welding gun is the most durable model of the Magnum PRO L-series family. With sufficient amperage for bigger jobs, the Magnum PRO 250L welding gun is recommended for medium-duty job shop and production applications.
- Premium Tip Performance: The large mass of the Magnum PRO Copper Plus® contact tips help disperse heat, keeping tips cooler and expanding their life. The Anti-Seize™ threads prevent tips from seizing in the diffuser.
- Comfortable Grip: The lightweight curved handle with soft rubber over molding enhances comfort and allows for an easier grip of the gun.
- 100% Duty Cycle: The 250L runs at 100% duty cycle using mixed gas, helping it withstand tough jobs.
- Chrome Plated Gun Tube: The chrome plating prevents spatter from adhering to the gun tube, making it last longer.
Process
MIG, Pulsed MIG, Flux-Cored
Product Number
K4530-2, K4873-2, K4874-2
See compatibility charts on pages 2-3.
What's Included
- Contact Tips: KP2744-035T (Qty 1), KP2744-045T (Qty 1)
- 1/2 in. (12.7 mm) Thread-On Gas Nozzle Flush (KP2742-1-50F)
- Thread-on Diffuser (KP2746-1)
- Gun Liner (KP42-4045-15)
- Integrated Gun Connector
Over-Molded Handle
The over-molded handle design offers key benefits to the operator:
- Increased Comfort
- Enhanced Grip
- Reduced Hand Fatigue
- Improved Control
Magnum PRO Expendables
Lincoln Electric's long-lasting Magnum PRO expendables are designed with welding arc performance in mind. Using Magnum PRO expendables results in more time welding and less time wasted.
Copper Plus Technology
With a larger diameter to disperse heat and keep tips cooler.
Anti-Seize Threads
To prevent the contact tips from melting, fusing, and seizing in the diffuser.
Easy to Clean
Nickel plating keeps spatter from sticking to the nozzle.
Easy to Unscrew
With coarse threads that prevent seizing.
Machine Compatibility (Lincoln Electric)
| Gun | Compatible Machines |
|---|---|
| Magnum PRO 100L (4-pin) K4528-1 | POWER MIG® 140C K2471-2 |
| Magnum PRO 100L (8-pin) K4528-1-8P | POWER MIG 140 MP® K4498-1 |
| Magnum PRO 175L K4529-1 | POWER MIG 210 MP K3963-1 |
| Magnum PRO 250L K4530-2 | POWER MIG 256 K3068-1/K3068-2 |
| Magnum PRO 250L (K466-10) K4874-2 | POWER MIG 180C K2473-2 |
| POWER MIG 180 Dual K3018-2 | |
| POWER MIG 260 K3520-1 | |
| LF-72™, LF-74™ Series, Flex Feed® 74 HT, Flex Feed 84, LN-25 PRO®, LN-25X®, Activ8®, Activ8X® Power Feed® 10, 10M, 25M, and 84 |
Machine Compatibility (Miller)
| Gun | Compatible Machines | Direct Replacement For |
|---|---|---|
| Magnum PRO 100L K4871-1 | Millermatic® 141 and 211 Multimatic® 215 and 220 AC/DC | MDX™-100 M-100 |
| Magnum PRO 175L K4872-1 | Millermatic 212 Auto-set, 252 and 255 Multimatic 200 and 255 | MDX-100 M-150 |
| Magnum PRO 250L K4873-2 | MDX-250 MDX-250 EZ-Select™ |
Parts and Specifications
Contact Tips
| Wire Diameter in (mm) | Standard | Tapered | ||
|---|---|---|---|---|
| Pkg. Qty. -10 | Pkg. Qty.-100 | Pkg. Qty.-10 | Pkg. Qty-100 | |
| 0.025 (0.6) | KP2744-025 | KP2744-025-B100 | KP2744-025T | KP2744-025T-B100 |
| 0.030 (0.8) | KP2744-030 | KP2744-030-B100 | KP2744-030T | KP2744-030T-B100 |
| 0.035 (0.9) | KP2744-035 | KP2744-035-B100 | KP2744-035T | KP2744-035T-B100 |
| 0.040 (1.0) | KP2744-040 | KP2744-040-B100 | KP2744-040T | KP2744-040T-B100 |
| 0.045 (1.2) | KP2744-045 | KP2744-045-B100 | KP2744-045T | KP2744-045T-B100 |
Gas Diffuser
| Pkg. Qty. | Part Number |
|---|---|
| 1 | KP2746-1 |
| 25 | KP2746-1-B25 |
Gun Tube Insulator
| Pkg. Qty. | Part Number |
|---|---|
| 1 | KP2773-2 |
| 25 | KP2773-2-B25 |
Gun Tube
| Degree | Part Number |
|---|---|
| 60 | KP3078-60 |
| 45 | KP3078-45 |
Gas Nozzle
| Nozzle in (mm) | Pkg. Qty. | 0.375 in (9.5 mm) | 0.5 in (12.7 mm) | 0.625 in (15.9 mm) |
|---|---|---|---|---|
| 1/8 (3.2) Recess | 1 | KP2742-1-38R | KP2742-1-50R | KP2742-1-62R |
| 25 | KP2742-1-38R-B25 | KP2742-1-50R-B25 | KP2742-1-62R-B25 | |
| Flush | 1 | KP2742-1-38F | KP2742-1-50F | KP2742-1-62F |
| 25 | KP2742-1-38F-B25 | KP2742-1-50F-B25 | KP2742-1-62F-B25 | |
| 1/8 (3.2) Stickout | 1 | KP2742-1-38S | KP2742-1-50S | KP2742-1-62S |
| 25 | KP2742-1-38S-B25 | KP2742-1-50S-B25 | KP2742-1-62S-B25 |
Gun Liner
| Cable Length Pkg Qty | Steel 0.025-0.030 in (0.6-0.8 mm) | Steel 0.030-0.035 in (0.8-0.9 mm) | Steel 0.035-0.045 in (0.9-1.1 mm) | Aluminum .035 - 3/64 in. (0.9-1.2 mm) |
|---|---|---|---|---|
| 15 ft (4.5 m) 1 | KP42-25-15 | KP42-3035-15 | KP42-4045-152 | KP44N-3545-15 |
| KP42-4045-15-B10 |
1 When using nozzle sizes less than 5/8 in. (15.9 mm), tapered tips are recommended.
2 Standard on Magnum PRO 250L.
Product Specifications
| Product Name | Product Number | Amperage Rating 100% Duty Cycle | Wire Diameter Range in (mm) | Cable Length ft (m) | Pin Connection |
|---|---|---|---|---|---|
| Magnum PRO 250L | K4530-2 K4873-2 K4874-2 | 250A | 0.025-0.045 (0.6 - 1.2) | 10 (3.0) | POWER MIG 256, 260 Miller Compatible K466-10 |
Customer Assistance Policy
The business of The Lincoln Electric Company is manufacturing and selling high quality welding equipment, consumables, and cutting equipment. The company's challenge is to meet the needs of its customers and to exceed their expectations.
On occasion, purchasers may ask Lincoln Electric for information or advice about their use of its products. Lincoln Electric employees respond to inquiries to the best of their ability based on information provided by customers and their knowledge concerning the application. However, employees are not in a position to verify the information provided or to evaluate the engineering requirements for the particular weldment. Accordingly, Lincoln Electric does not warrant or guarantee or assume any liability with respect to such information or advice. Moreover, the provision of such information or advice does not create, expand, or alter any warranty on its products. Any express or implied warranty that might arise from the information or advice, including any implied warranty of merchantability or any warranty of fitness for any customer's particular purpose, is specifically disclaimed.
Lincoln Electric is a responsive manufacturer, but the selection and use of specific products sold by Lincoln Electric is solely within the control of, and remains the sole responsibility of, the customer. Many variables beyond the control of Lincoln Electric affect the results obtained in applying these types of fabrication methods and service requirements.
Subject to Change: This information is accurate to the best of Lincoln Electric's knowledge at the time of printing. Please refer to www.lincolnelectric.com for any updated information.
The Lincoln Electric Company
22801 Saint Clair Avenue
Cleveland, OH 44117 U.S.A.
Phone: +1 216.481.8100
www.lincolnelectric.com
