You are supposed to grease the rotating tip. There is a small hole there and the grease gun can be bought at the saw dealer.
That's all I do - grease the tip every time I run it. I've never rotated or flipped the bar intentionally. I never gave it much thought. I do clean the whole chain saw after using it at the end of the day.
I have three chainsaws i run...i turn the bar over once or twice a year...usually when I file off the flattened out edges on the bar. When the bar gets really old...i'll always run it with the largest dip on the bar's tip (missing metal) on top....so I can remove more bottom bar metal.
Professional chainsaw bars have no grease hole.
Wow...I was plump poopered after 1 gallon of gas in my 30's....i knew when it was time to stop when that first little cloth "nick" to my jeans happened...meant I was tired (not in control) and the saw was getting a bit heavy. I'm lucky if i can run 1/3 of a gallon at age 60.
lol, I must be using a non-professional chainsaw. To me, any chainsaw is a professional chainsaw...it can hurt you. I don't use grease in those non-professional bar tip holes for the bearings...cause once in dirt (you will get -hit dirt)...you'll wear those bearings out faster. After i use my saw....i clean it, change the chain to a sharpened one and then use my oil gun (pressured oil) directly into those holes to clean out and oil the tip bearing.
I know. But they don't last forever.
A plastic crankcase homeowner clamshell would not last long logging. Keep the bar rails clean and the saw oil pump will provide oil to the tip. If you are cutting in dirty conditions use a solid hard non roller tip bar designed to do so.
I'm working on building up chain inventory again. I cut mostly hedge for posts. Change chains every couple hours. Resharpen, and reuse until there's nothing left to sharpen. But you gotta have a bunch of your going to cut a full day.
