I dunno maybe it's because time flies when it's multiflora rose and buckthorns that are getting whacked. It seems that these blades are needing retirement after 8 or so hours. Is this typical for this type of material. WIde range of material but much of it is 2". We are not hitting rocks or soil. Anyone out there care to share their experience? This is a 8" Renegade blade after about 4-6 hrs. We have since learned that using wd-40 would make a difference.
Eight hours seems short for a blade to be completely trashed. I have never used the circular saw blades, but did a lot of work using the three-blade brush knife, when I was cutting ski trails, last summer. I found that the blade would need sharpening after a single shift, but would last for a month or even two before it was too short to use, and I hit rocks all the time. Your blade mostly looks like it is caked in burnt-on sawdust. Maybe try cleaning and sharpening at the end of the day, and see if that has an effect? They also make carbide-tipped brush saw blades, but most of the guys I work with don't like them because they are shot after you hit one rock.