The 10-pack T-M045 contact tips are .045 inch MIG contact tips sold for Miller MDX Series guns: the MDX-100, MDX-250 and MDX-250 EZ-Select. Retailers list the T-M045 as the Miller AccuLock MDX contact tip, so it is a match only if your gun takes AccuLock MDX consumables and you run .045 inch wire. This review is based on the Amazon listing and retailer pages, not hands-on testing.
10-pack T-M045 contact tips at a glance
| Item | Detail (per the listing) |
|---|---|
| Part number | T-M045 |
| Pack size | 10 contact tips |
| Wire size | .045 inch |
| Listed gun fit | Miller MDX-100, MDX-250 and MDX-250 EZ-Select air-cooled MIG guns |
| Material | Copper per retailer listings; confirm on the Amazon listing |
| Length | About 1-1/8 in on one retailer listing |
| Package weight | 2.57 ounces per the Amazon listing |
| Warranty and returns | Not confirmed here; check the current listing |
Prices change, so check the current listing.
What the T-M045 is and who it suits
A contact tip passes welding current to the wire as it leaves the gun. The hole has to be just large enough for the wire to slide through while still making good electrical contact. Heat, spatter and wire friction slowly enlarge it, so tips are consumables.
A 10-pack suits owners of an MDX-100, MDX-250 or MDX-250 EZ-Select who run .045 inch flux-core or solid wire and want spares on the shelf. It is not for guns that use a different tip thread or for .035 inch wire.
How to check the tips fit your gun
- Confirm your gun is one of the listed MDX models and that it uses AccuLock MDX consumables.
- Check the wire diameter on your spool. The tip must match it.
- Place a new tip beside the one in your gun and compare thread, length and head shape.
- After installing, make sure the wire feeds freely and the nozzle seats correctly.
Pros and limitations
Pros
- Ten tips in a pack, so you can swap in a fresh one as soon as the arc gets erratic.
- Listed by retailers for three named MDX guns, which narrows the fit search.
- Replacing a tip needs no special tool beyond pliers or a wrench.
Limitations
- Fit is limited to the MDX Series and .045 inch wire.
- Material, weight and return terms differ between listings, so verify them where you buy.
- A new tip will not fix feeding problems caused by the liner, drive rolls or ground.
Installing and caring for contact tips
- Switch off the welder and let the gun cool.
- Remove the nozzle, unscrew the old tip and thread in the new one finger-tight, then snug it. Do not over-tighten.
- Refit the nozzle and trim the wire.
- Keep the liner clean, because a dirty liner causes erratic feeding and tip wear.
- Wear gloves, a welding helmet and flame-resistant clothing, and ventilate the area.
Alternatives and related guides
- 10-pack T-M035 contact tips review for .035 inch wire
- 40-pack T-M035 contact tips review
- How to replace a MIG contact tip
Frequently Asked Questions
What size wire do the T-M045 contact tips use?
They are .045 inch tips. Use them with .045 inch wire only, because a tip that does not match the wire diameter causes poor feeding, arcing or burn-back.
Which Miller guns do the T-M045 tips fit?
Retailers list the T-M045 for the Miller MDX-100, MDX-250 and MDX-250 EZ-Select air-cooled MIG guns. Check your gun model and manual before ordering, and compare the new tip with the one in your gun.
What are the T-M045 contact tips made from?
Retailer listings describe the Miller T-M045 as a copper tip. Confirm the material on the Amazon listing you buy from.
When should I replace a MIG contact tip?
Replace it when the hole is enlarged or oval, the wire wanders, the arc turns erratic or the wire sticks in the tip. There is no fixed hour count, because amperage, wire type and liner condition all change wear.
Do the tips come with a warranty?
The listing details we have do not confirm a warranty. Return terms vary by seller and can change, so check the current Amazon listing before you buy.
Verdict
This pack is a sensible stock of consumables for an MDX-100, MDX-250 or MDX-250 EZ-Select running .045 inch wire. Check the gun model, wire size and material on the listing before ordering.
