I would go with the cheaper ones to begin with. The tungsten is not measurably consumed as part of the process. It is simply the last part ofthe current path to the work. Cheaper is better to start with ... at least in my opinion ... because I'd mess them up from brain fade much more quickly than current erosion.
At least for me, when starting out the tungsten got shorter because I kept accidentially dipping the electrode and had to stop and grind a new point. Even at my high 'klutz' rate I've yet to go thru a full 10 pack of electrodes.
At least for me, when starting out the tungsten got shorter because I kept accidentially dipping the electrode and had to stop and grind a new point. Even at my high 'klutz' rate I've yet to go thru a full 10 pack of electrodes.