I have been told that you do not need to grease the tip sprocket on the bar. They say it gets enough lubricate from the chain oil. What do you pro's do? I have always regreased it with every tank of gas.
Never in 20 years. I do, however, use the air nozzle on my compressor to blow the crud out of the bar and tip whenever the saw gets serviced/ cleaned. I'll hit the tip with the air until it free spins. You can see the chunks of crud fly out and the old black oil dribble out the oiler holes. That clears it out so the clean oil can get into the bearings the next time I run the saw.
I grease mine. I get the injector (disposable) pretty cheap here in town and it lasts 6-9 months. I have found it does lengthen my sprocket life significantly. I brush a lot of hard wood, manzanita, buck and deer brush. A lot of dead hard wood also. It has helped. Cheap maintenance compared to bar replacement. I think I payed about 5 bucks for my last injector. If I even get 25% more life out of my bars (9) it is much cheaper. And i know I get at least 25 percent more life in my bars for what I cut. Brushing is VERY hard on the bars. In trees, I don't know that I get the same percentage. But I would wager if I tracked it long enough.....
The grease tends to capture and hold grit and grime in the bearing. If you don't continue to grease and push out that grime (once you start greasing) it will build up and sieze the bearings.
I only run premium bars, Stihl ES and GB, which have no grease hole.
The first thing I do when I get a Husky with an Oregon bar on it, is pull off the bar, throw it away, and replace it with a GB bar.
IMO the Stihl ES is the best bar on the market, the GB titanium is a close second.
Anyone remember Walt? I remember him saying that if you did, do it every time religiously....otherwise don't do it at all. I quit. It is one of those things that sure FEELS like it should be doing some good though.