Welding Products Contact Tips
The same high performance, material and manufacturing process as is used for all original equipment contact tips
In some instances C122 DHP or CrZr is an adequate choice. With alloying we can increase several key characteristics creating a Superior Consumable with increased conductivity, even higher softening temperature and improved hardness. This means a reduction in "arc start failures" and increased tip life.
|Outside Diameter||6 - 10mm|
|Bore Diameter||0.7 - 3mm|
|Tolerance for OD and bore||+/-0.05mm|
1. Common physical wear or abrasion, if you were to place a tip on the wire before the feeder with NO electrical contact, that tip would eventually wear completely through.
2. Electrical erosion is similar to the brushes on an electrical motor or the spark jumping across the gap on a spark plug. As the wire is traveling through the Contact tip at say 300 IPM the electricity has to jump across from the copper tip to the Mig wire. (Hence the name “Contact Tip”) The inside bore of the tip / wire is in constant electrical arcing as this process is happening. Electrical erosion is melting of the welding tip ID.
If you are attempting to get a “sure start” you need to choose the best alloy whether for electrical or physical wear. The next reason a tip wears is to do with heat. As the tip heats from the welding process the properties of the alloys start to break down.
The ability of the tip to dissipate the heat (thermal conductivity) will aid in keeping the tip cooler. The (electrical resistance) of the alloy is also in direct inverse proportion to the electrical conductivity.
As we need a “sure start” and are attempting to jump the gap from the contact tip to wire these two factors play a critical role, if the tip has higher conductivity of electricity it will transfer the current easier (or with less resistance) which will also cause the tip to run cooler.
Resistance equals heat. The additional benefit to higher conductivity is that the arc transfer from the tip to the wire is easier.
Easier arc transfer means a superior “sure start” and less arc failure or wire BURN BACK, sputtering and spatter.
|Thermal Conductivity||Electrical Resistance||USA
|Chromium Zirconium||Cu min 99+
|Phosphorous Deoxidized||Cu min 99.9
|Silver Alloy||Cu 99