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14008073 Binzel MB15 0.8mm Contact Tip - Standard M6, 0.8mm Dia 25mm Long
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    Rapid Ref : 14008073  Mfr Ref : 140.0059

    Binzel MB15 M6 Standard Contact Tip. 0.6 - 1.2mm dia, 25mm long
    140.0059 14008073

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    £0.46  EX VAT
    SSP Suggested Selling Price = £0.76  YOU SAVE £0.30

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    Lincoln Bester 215MP Parts FAQs

    Practical answers on the torch consumables, wire feed parts and holder spares used with a multi-process MIG welder, and how to match them to your machine.

    How do I tell when a MIG contact tip is worn out?icon-minus-redicon-plus-red

    The most telling sign is the hole: when the bore is no longer round and has become oval or eroded, the tip no longer feeds the wire precisely and should be replaced. Strong discolouration from overheating is another reason to change it.

    In use, a worn tip shows up as an erratic arc, wire that snags or feeds unevenly, or the wire burning back into the tip. A blackened or spatter-covered tip is not always a reason to replace it, and a fixed swap schedule is less reliable than looking at the bore. Check the tip each time you change the wire spool.

    How tight should a contact tip be, and does it matter?icon-minus-redicon-plus-red

    It matters a lot. A tip that is loose, or not sitting flat on its holder, gives a poor electrical connection, which makes it overheat and wear quickly. The tip should sit flat on the tip holder with the threads in full contact, tightened with a suitable tool.

    As a rule, screw it in by hand and then snug it with the correct tip tool; over-tightening can damage the tip or the holder. Do this with the torch cold and the machine isolated, and make sure the tip, holder and diffuser are all clean and fully seated before you start welding.

    When should I clean or replace the gas nozzle?icon-minus-redicon-plus-red

    The nozzle directs the shielding gas over the weld, so spatter inside it can restrict the gas flow or make it turbulent, which can cause porosity in the weld. Clean it regularly for this reason. Replace the nozzle if it is bent, damaged or has spatter that can no longer be removed.

    Clean it with the machine off and the torch cold, using an anti-spatter product or a soft wire brush rather than scraping with pliers, and do not hit it to knock spatter off, as that can deform it and damage the parts behind it. Use a nozzle rated for the current you weld at, because a nozzle used above its rating can break down from overheating.

    How do I choose the right liner for my wire?icon-minus-redicon-plus-red

    The liner guides the wire from the feeder to the contact tip and must suit both the wire material and its diameter. Hard wires such as steel and stainless generally use a spirally wound steel liner, while soft wires such as aluminium and copper generally use a PTFE liner. A liner with too large a bore gives the wire too little support, so it can fold and tangle in the feeder.

    So choose by wire type first, then by the diameter range printed on the liner, and make sure it is long enough for your torch. Do not rely on colour codes alone, as these can differ between makers. Check the torch manual for the liner type it takes.

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