Improper tension will cause premature wear there. That looks pretty extreme. Sure you have the proper pitch chain?
How many chains has your saw been through on this sprocket? They are considered a wear item. Oregon suggests replacing the sprocket every two chains. I usually get more out of them than that, but it's a place to start, I guess. If you feel it's premature wear, Wood Wolverine made good suggestions.
Over the years I have encountered some folks that think if they tension the chain super tight it won’t get slack. Instead of sharpening the chain they tighten the chain and continue. I have never seen a spur sprocket as hammered as yours. Wow
I'm sure I have the proper pitch. I probably ran about 80 tanks for gas through the saw. I didn't think I had the chain too tight or too loose.
80 tanks explains a lot! It is a consumable part and gave you good service. Maybe get a new one with a rim sprocket. I'd say that it's a wall hanger for sure.
That... is completely knackered. I'm sortof impressed. 'I paid for the whole sprocket, imma use the whole sprocket!'
I’ve got a small collection of clapped out spur gears that have tons of hours on them. They don’t look like that. Slow wear through excessive use produces a smooth narrow groove where the drive links were tracking. All that displaced metal that turned blue tells me it happened rapidly. When you say you verified the chain pitch, you mean that you measured the distance between one pin and another 2 pins away, and took that number and divided it by two? And then confirmed that the bar you’re running is that pitch by locating the factory stamping/etching? What I’m getting at is that I’ve been burned years ago simply going into a store, picking up a package of chain, looking at the back, seeing my model listed and thinking it’s the right one. Many models have different bar and chain combinations. Pitch, gauge, low profile chain as opposed to standard. Lots of variations. The whole spline on yours is blue from overheating. I suppose that could happen if the sprocket finally reached a tipping point and the chain suddenly started slipping, but I would think you’d feel that in the performance and stop before it got out of hand.
different type of sprocket and clutch drum that is found on most pro series saws. I put them on even my home owner grade saws. You have to get one that fits your saw, but they will last longer and allows the chain to float better on the sprocket and not bind going into the bar groove. You can also get different drive count sprockets if you have torque you want to trade for chain speed, like a short bar on a big ported power head.
Well it is not April 1st so, looks like soft metal to me but if it made it 80 tanks of fuel...........................I would say it owes you nothing and replace it
