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MB25 · 0.8 mm (0.03 in)

STM Der Meisterladen MB25/250 wear parts set, M6, 0.8 mm

The three parts that wear on a MIG torch, in the size 0.8 mm (0.03 in) wire needs.

STM Der Meisterladen MB25/250 wear parts set, M6, 0.8 mm, product photograph

STM Der Meisterladen MB25/250 wear parts set, M6, 0.8 mm

The three parts that wear on a MIG torch, in the size 0.8 mm (0.03 in) wire needs.

Torch
MB25 / type 250
Thread
M6
Wire diameter
0.8 mm (0.03 in)
Contents
Contact tips, gas nozzle, tip holder (diffuser)
Amazon reference
B0CX51BHFY
EAN
4262437811963
  • Matched to 0.8 mm (0.03 in) wire, which is the default diameter for steel
  • MB25 is one of the two commonest torch fitments in Europe
  • MB25 parts do not fit an MB15 torch — check the torch, not the machine

Best for: Anyone running an MB25 torch who has been welding with a worn tip

Check price on Amazon

Specifications

Torch
MB25 / type 250
Thread
M6
Wire diameter
0.8 mm (0.03 in)
Contents
Contact tips, gas nozzle, tip holder (diffuser)
Amazon reference
B0CX51BHFY
EAN
4262437811963

Three parts, three lifetimes

The contact tip wears fastest — it is a copper hole carrying current to a moving wire. The gas nozzle gets clogged with spatter and eventually cracks. The diffuser lasts longest. That is why sets contain several tips and one or two of the rest.

A cheap fix for an expensive-looking fault

A worn tip mimics a machine fault convincingly: erratic feed, wandering arc, sticking wire. Keeping a set on the shelf turns a lost evening into a two-minute change.

Sources

Every figure above comes from the manufacturer’s published specification for this reference. Fields the listing does not publish are left out rather than estimated. Market availability was verified per market on the EAN.

The questions welders ask

How do I know when a contact tip is worn?

The hole goes oval and slightly larger, and the arc starts to wander — spatter increases, the wire occasionally sticks, and the bead moves about. It happens long before the tip looks damaged. If a machine that welded cleanly last month is misbehaving at the same settings, change the tip before touching a dial.

MB15 or MB25 — how do I tell?

By the torch, not by the machine. The number is usually stamped or printed on the torch neck or handle, and MB25 is physically larger, rated for more current and takes different nozzles and diffusers. Machines are sold with either, and the same machine model can ship with different torches in different years.

Welders this fits

More torch parts

  • STM Der Meisterladen MB25/250 wear parts set, M6, 1.0 mm, product photograph

    STM Der Meisterladen MB25/250 wear parts set, M6, 1.0 mm

    The same set in 1.0 mm — because tips are diameter-specific and mismatching them jams the torch.

    Torch
    MB25 / type 250
    Thread
    M6
    Wire diameter
    1.0 mm (0.04 in)
    Contents
    Contact tips, gas nozzle, tip holder
    Amazon reference
    B0CX51784W
    EAN
    4262437811970
    • Matched to 1.0 mm (0.04 in) wire for heavy-section work
    • Same MB25 fitment as the 0.8 mm (0.03 in) set — one torch, two tip sizes on the shelf
    • Not sold on the American store at the time of checking

    Best for: Workshops that switch between 0.8 and 1.0 mm (0.04 in) wire for different jobs

    Search Amazon for this model
  • Bestarc AG60P plasma consumable kit with nozzles and electrodes in a case

    bestarc AG60P-50-BOX

    Fifty plasma consumables itemized piece by piece, for the AG-60 and SG-55 torch patterns — the first plasma parts on this shelf.

    Amazon reference
    B0D2L8DPKL
    EAN
    0727431700773
    • Itemizes all fifty pieces — 20 nozzles, 20 electrodes, 5 shield cups, 5 wire guides — and the total is right
    • Names five torch patterns it fits: AG-60, AG-60P, SG-55, WSD-60 and the BTC500DP head
    • No current rating on the nozzles — a plasma nozzle is sized by amperage, and the figure is absent

    Best for: An AG-60 or SG-55 plasma torch, stocked for a season rather than a job

    ≈ $33
    Check price on Amazon
  • OKBA replacement MIG welding gun for Lincoln Magnum 100L with cable

    OKBA Magnum 100L replacement torch, 100 A, 10 ft

    A complete 100-amp MIG gun with three meters of cable, on a shelf of consumables — and a listing whose own reference reads "Contact Tips-035".

    Amazon reference
    B09NKC5MS5
    EAN
    0752771083873
    • Replaces the whole gun, which is the answer when the neck, the liner or the cable is the fault rather than the tip
    • Names the machines it fits in detail — SP-140T, SP-180T, MIG Pak 140 and 180, Pro-MIG 140 to 180, Weld-Pak 125 to 140HD, Power MIG 140T to 180T, Easy-Core 140 and 180
    • The manufacturer reference on the page reads "Contact Tips-035", which is a consumable, not a gun

    Best for: A Lincoln or YESWELDER machine whose gun has been damaged beyond the consumables

    ≈ $55
    Check price on Amazon

Elsewhere in the workroom

  • Alffun 68-piece TIG consumable kit with collets, bodies and ceramic cups

    Alffun 68-piece WP-17/18/26 kit

    Eight plus twenty plus twenty plus twenty, itemized by 10N part number and matching its own stated total — which on this shelf is not the norm.

    Amazon reference
    B07L8VDGFW
    EAN
    0632230689443
    • The contents add up: 8 back caps, 20 collets, 20 gas lens collet bodies and 20 alumina cups is 68
    • Itemizes every piece by 10N part number and by both metric and imperial size
    • Gas lens bodies only — no plain collet bodies, which use less argon on simple work

    Best for: A WP-17, 18 or 26 torch stocked in three tungsten sizes at once

    ≈ $33
    Check price on Amazon
  • RIVERWELD 63-piece TIG gas lens kit laid out with its cups and collets

    RIVERWELD 63-piece WP-9/20/25 gas lens kit

    The most completely specified kit in this hub — five tungsten sizes, thirteen gas lenses and thirty-one cups, each identified by its original part number.

    Amazon reference
    B0158NWVGY
    EAN
    0738470709474
    • Covers five tungsten sizes — 0.020, 0.040, 1/16, 3/32 and 1/8 in — in collets and collet bodies both
    • Thirteen gas lenses by part number, including the 45V42 to 45V45 range and the 45V204S, 45V116S, 45V64S and 995795S
    • The highest price on this shelf, by a clear margin

    Best for: A WP-9, 20 or 25 torch that has to cover everything from 0.020 in tungsten upwards

    ≈ $55
    Check price on Amazon
  • RX WELD 79-piece TIG torch accessory kit in its box

    RX WELD RXATIG 79-piece kit, WP-17/18/26

    The biggest piece count on this shelf, and the only listing that rules out CK torches in so many words rather than hedging.

    Amazon reference
    B07DN8Y7C1
    EAN
    0653905878917
    • Seventy-nine pieces, the highest count on this shelf
    • States plainly "Do Not Fit CK Torch" rather than leaving it to be discovered
    • No itemization anywhere: 79 pieces with no breakdown, no sizes and no part numbers

    Best for: Stocking a WP-17, 18 or 26 torch for a year in one purchase

    ≈ $30
    Check price on Amazon

All torch parts