Design and function
MIG/MAG welding
34
099-005323-EW501
21.05.2014
5.8
MIG/MAG welding
5.8.1
Welding torch and workpiece line connection
NOTE
Fault with the wire guide!
On delivery, the central connector is fitted with a capillary tube for welding torches with
spiral guides. Conversion is necessary if a welding torch with a plastic core is used!
Welding torch with plastic core:
• use with guide tube!
Welding torch with spiral guide:
• use with capillary tube!
Depending on the wire electrode diameter or type, either a steel liner or plastic liner with the
correct inner diameter must be inserted in the torch!
Recommendation:
• Use a steel liner when welding hard, unalloyed wire electrodes (steel).
• Use a chrome nickel liner when welding hard, high-alloy wire electrodes (CrNi).
• Use a plastic core to weld or braze soft wire electrodes, high-alloy wire electrodes or aluminium
materials.
Preparation for connecting welding torches with a plastic core:
• Push forward the capillary tube on the wire feed side in the direction of the central connector and
remove it there.
• Slide plastic core guide tube off the central connector.
• Carefully insert the central plug for the welding torch, with the still oversized plastic liner, into the
central connector and screw together with crown nut.
• Use a suitable tool to cut off the plastic liner just before the wire feed roller, making sure not to pinch it.
• Unfasten and remove the central plug on the welding torch.
• Cleanly remove the burr from the separated end of the plastic core!
Preparation for connecting welding torches with a spiral guide:
• Check that the capillary tube is correctly positioned in relation to the central connector!
