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A5.20: E71T-11 DC- Innershield® NR-211-MP is a versatile wire suitable for all-position welding of light gauge or thin plate. It is recommended for maximum plate thicknesses in the 7.9mm to 12.7mm range. For an easy-to-use general fabrication wire - choose Innershield® NR-211-MP.
Straight answers to the questions people ask most when buying spare parts for a compact MIG welding machine and its torch.
The consumables at the front of the torch wear first: the contact tip, the gas nozzle and the gas diffuser. Behind them, the liner that guides the wire along the cable also wears and can clog with dirt and copper dust.A worn contact tip causes an unstable arc, a clogged liner causes poor wire feed, and a spatter-filled nozzle upsets the gas shield. Replacing these in good time protects weld quality and helps avoid damage to the torch.
Yes. The hole must match the diameter of the wire you are using, with only a very small clearance so the wire can slide freely while still making good electrical contact. An oversized hole lets the wire move about, causes arcing inside the tip and is a common cause of burnback, so a bigger tip is not a cure for feeding problems.For aluminium wire, use tips made for that wire. Check the wire size on the spool and the size marked on the tip when you order.
The liner's bore must suit the wire diameter, and the material must suit the wire type. Steel liners are normally used for steel wire. Plastic liners such as PTFE are generally used for aluminium because they create less friction and do not shave metal from the soft wire.A liner that is too large lets the wire wander, and one that is too small makes it bind. Colour coding varies between makers, so check the bore range on the liner itself rather than relying on colour alone, and follow the torch maker's guidance for other wire types.
The liner must reach the correct point at both ends of the torch. If it is trimmed too long or too short, the wire can snag or be unsupported, which causes serious feeding problems.The correct amount of liner to leave protruding or to trim back is given in the maker's instructions for your torch, and many makers supply a gauge or marks to help. Follow those, and do not guess the length.
