Life expectancy on cutting head

[bigfoot86]

So I purchased a nils 6" convertible auger last year and have been meaning to buy a replacement head for when I have to send the one I currently have in for sharpening.  Right now there sold out for the season but it's no worries as I don't have a need for it yet.  Not sure how many holes I've drilled with it so far but well past 500 holes lin 6-8" of ice and it still cuts as well as it did the very first hole I drilled with it, like BUTTER! 

Was wondering, for the people that own a nils, how long on average would you say you can expect good performance out of a new or newly sharpened head?  How many seasons or holes?

[Uppervalley Kid]

If you are cutting ice and treat it well... years before sharpening. But if you so much as nick a rock or get into some branches she will dull up quick. IMO they are the best auger out there, that said it's a good idea to have a spare blade. Nothing worse than being out on 2'+ of slushy ice and trying to cut holes with a spud bar... or worse have nothing at all. Also when you do need to have your blade sent in for sharpening, your auger is not out of commission.

[filetandrelease]

 I have 2 heads from the 80s , 4.5”,  6”, and still cutting , I get 5 are 6 years before touching up , I don’t let mine get to the point it won’t cut , you will get more years that way , as with any thing abuse it and lose it , I always carry a spare head with me , you just never know