It is important to have the correct size contact tip when welding with Aluminium.
If the tip is not the correct size, there can be many "issues" which arise.
As the tip gets hot, the tip expands but the hole diameter contracts which can cause additional drag on the contact tip, as the wire also has an expanding effect.
Manufactured from pure electrolytic copper, this contact tip has a Vickers hardness (HV) of approx. 110 to 115. The purity of its copper ensures very good current transfer, heat transfer and thermal conductivity. As it softens already at a temperature of approx. 260° C, it is more suitable for the low ampere range.
Bags of 10.