The value of precise grinding of tungsten electodes

The art of precise grinding

Grinding a top angle on the tungsten electrode is a precision job. The angle can vary from 15 to 180 degrees. The grinding grooves should run in the longitudinal (axial) direction of the tungsten electrode and never around the tungsten electrode (radial). A tungsten electrode with the grinding grooves around the tip will hardly ever have a stable arc. The arc searches for the places with the lowest resistance on the grinding grooves and will therefore rotate around the tip of the tungsten electrode.

Maintaining the properties and molecular structure of the tungsten electrode is imperative for the correct functioning of the electrode when welding. It is therefore important to prevent an eventual oxidation (production of oxides) on the surface of the electrode when grinding it. Keeping the temperature low is best assured by using a liquid coolant.

Knowing that grinding also causes friction, and thereby heat, it is also of interest to reduce the time of grinding by using a dedicated diamond wheel. It is then possible to obtain a well preserved ground electrode with a smooth and even surface with a polished finish for an optimal performance.

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