The Tweco 1420-1113 is a 15 foot steel MIG gun liner for 0.030 to 0.035 inch wire, sold as a replacement for hard-feeding guns. In this Tweco 1420-1113 liner review, based on the Amazon listing and retailer part data, it is a worthwhile fix if your wire stutters and your gun uses a compatible liner style, but fit is the thing to verify. The Tweco 1420-1113 MIG liner is a 15 ft replacement liner for compatible guns.
Quick specs at a glance
| Item | Per the listing and part data |
|---|---|
| Part number | Tweco 1420-1113 |
| Length | 15 ft |
| Wire size | 0.030 to 0.035 in (0.8 to 0.9 mm) |
| Construction | Zinc-plated steel spring wire, per the listing |
| Rating | Listing mentions up to 250 A; check your gun’s rating |
| Verify | Gun series, end fitting, cable length |
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What a MIG liner does and who this suits
The liner is the coiled guide inside the gun cable that supports the wire from the drive rolls to the contact tip. Dirt, kinks or the wrong size cause feeding trouble and burn-back.
This 15 foot liner suits owners of guns with a cable of up to that length who run 0.030 or 0.035 inch steel wire. It is a typical replacement consumable, not an upgrade.
How to check it fits your gun
- Measure your gun cable length and note the liner length your manual specifies.
- Identify the end fittings (set screw, crimped guide, or O-ring style).
- Confirm the liner is meant for your wire size, 0.030 or 0.035 inch.
- Check that the liner type matches the wire. Steel liners are for steel and flux-core wire.
- Look at the gun’s amp rating. A 250 A claim is only relevant if your gun is not rated lower.
The listing says it works with many guns through a universal crimped guide. Treat this as a reason to check, not proof of fit.
Pros and limitations
- Pros: Specific part number to look up; wire range matches common hobby sizes; the 15 foot length covers many standard guns.
- Limitations: Not for aluminum wire, not a shorter-gun solution, and the listing does not describe the end fitting that you need to match. The “universal” claim is not verified.
Installing a MIG liner
- Unplug the welder, remove the nozzle, contact tip and diffuser, and lay the cable out straight.
- Loosen the retaining nut at the feeder end and pull out the old liner.
- Feed the new one in until it bottoms at the front, then cut it to the extension your gun requires.
- File the cut end smooth so no burrs catch the wire.
- Refit the nut, diffuser, tip and nozzle, then feed wire and test.
Alternatives and related guides
- Other liner styles: MIG welding liner and conduit review and FT liner review.
- Check the wire path end: WeldingCity contact tips review.
- Roll worn? See the wire feed drive roller review.
Frequently Asked Questions
What wire does the Tweco 1420-1113 liner take?
Retail listings give 0.030 to 0.035 inch wire (0.8 to 0.9 mm) in a 15 foot length. Use it with steel or flux-core wire of that size. Aluminum wire needs a Teflon or similar low-friction liner instead of a steel spring liner.
Will it fit my MIG gun?
Possibly, but check your gun series. Liners differ in length, end fittings and retention method between Tweco, Lincoln Magnum, Miller and other guns. Compare your old liner’s length and end style, and check the gun cable length in the manual.
Can I cut the liner to length?
Yes, liners are cut to match the gun cable. Follow the installation steps for your gun: pull out the old liner, lay the cable straight, cut the new one to the correct extension and deburr the end so it does not catch the wire.
How do I know the liner is worn?
Typical signs are wire that feeds unevenly, bird-nesting at the drive rolls, a crimped or kinked liner, dirty bore, or tip burn-back. Replace the liner if blowing it out with compressed air does not restore smooth feeding.
Verdict
A good, identifiable replacement liner for 0.030 to 0.035 inch steel wire guns, as long as your gun accepts it. Match length and end fitting before you buy.
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