NO NO NO.. never need to use a grinder on an axe..
my father was a proper tree feller ( 40 a day by hand) and he still has his one and only felling axe.. ( had a couple of shafts in 55 years)
keep it clean, keep it oiled, wrap the head in an oily rag when not in use, dont keep in the house ( the wood needs to breathe) oil occasionally with linseed oil
keep the edge keen with a carborundem stone , used wet in a circular motion, try to give it a slightly concave edge. Only use a proper axe file if you get a serious nick ( which you wont if only use it in wood) dad doesnt even have one never needed one he says..
use an axe as an axe not as a hammer, doorstop, wedge or anything else and it’ll last a life time literally
carry it properly axes are sharp and flesh is like butter to a felling axe. when chopping always make sure the wood is clear of the ground and is secured so that it dont move.