How long do the mill cutters usually last on the Xhorse dolphin XP-005? This is a commonly asked question.
It all depends on what you cutting, each key blank is different.
You should notice that the keys you cut don’t work as smooth as the other ones you did, it may be very slight, but pay attention and you will see what I’m talking about.
I change mine once a month at a minimum.
I would say I cut about 100 keys a month, but I can also go a couple days without cutting a single key. that’s why I change the cutting bit at least once a month.