Question about saws for you, and I know the answer will depend on a lot of variables but I'm interested in your views and experiences.
Chains, sprockets and bars all wear and wear together. How many chains per sprocket and per bar before you replace? Stihl say 2 chains per sprocket. I seem to hit rubbish and blunt chains a lot so I'm hoping for 4 per sprocket (I'm alternating 4 chains on my ms180). What about the bar? I've just thought about the bar as I've got 2 brand new chains for my 038 and finally a new sprocket. The bar on it has some life left but would it be best to set it aside and fit a new one along with the chains and sprocket?
I personally mix and match everything as I get pieces and parts from all over buying and selling as much as I do.
Some of the variables will be how well you maintain the bar as well as your chains, how much oil you have and the type of oil you run per the season, do you flip your bars, do you dress the bars, do you resize the bar groove these things, what kind of tension do you have your chain adjusted at, size of saw, type of wood, and even rim drive vs spur, how well you sharpen and how often. These can all make a huge difference in wear as well as the brand of parts you choose.
Cheaper aftermarket sprocket nose bars do not last as well as the pro bars with changeable tips. Consequently you can run more chains on a pro bar.
Same with chains and drives, if you buy cheap ones you will probably get less quality. There are some aftermarket bars that are very good quality and even better than the factory bars but most of those come at a greater expense. I don't know if any of the aftermarket drives are good or not other than Oregon ones which I would guess is what is on most huskys, but I'm not sure of this.
If you are eating up chains by hitting things in wood I would guess there could be a lessening of the run time of the bar too. A sprocket nose bar should last through 4 chains no problem, and they are a great alternative for a lightweight bar vs a pro when you compare the cost and the longevity. If you have a chain come off and you damage the driver on it and you put it back on the bar without filing the burrs off you will most likely shorten the life of the bar(I did this last night, old bar, and a bad chain so I wasn't concerned about it.
If you let the drive sprocket get warn excessively you will also stretch your chains out quicker and more than if you didn't, I learned this one years ago.
Guess I forgot to post this, don't feel so bad about being long winded after seeing SVK's post LOL.