This is what 50:1 does to a 562 in 300 hours. The same saw now has over 1000 hours on it with new bearings using 32:1.
Dated or not, I’ll keep on recommending it based on my findings, not what I read in a brochure
Thank you for your post.
I am yet to see a saw where the cage has collapsed and broken up.
Nearly all of the cage failures I have been involved with were caused by excessive lateral forces or insufficient running clearances with deep groove ball bearings and labouring engines with rollers .
In fact I would like to get one in my hands for a full & proper investigation as to cause.
FWIW my original training was in metallurgy and for a few years I did a lot of failure investigations sub contract to the police forensic department where I quickly learned the most obvious reason for failure was rarely the actual cause .
Now I deal with home owners , landscapers & builders , not full time loggers who run saws for hours on end.
I will assume that those photos are of one of your own saws where the only variable factor was the oil:fuel ratio and the engine was running within the designed speeds for that particular bearing and it was a standard saw and not one with stuffed crankcases fully ported & tuned exhausts running both faster and under much more load than the standard engine.
If that be the case then I will accept what you are posting as true with insufficient oil as the probable cause .
The work I have done with lubrication is of course lab work and those tests are not real life situations in fact they are far from it and are used for comparing the properties from one oil blend to another oil blend , not their actual properties during use as obviously running engines to destruction is way too expensive to do in the real world.
So no I am not a face book / brouchure / lable / TV add expert .
I am ( or was ) a scientist and thus have a scientists approach - facts are nothing more than theories yet to be proven wrong -.
So when what I believe to be true is proven to be wrong then my mind changes to accept the newer facts till they are proven wrong.
The important word is proven so at this point my opinion on oil:fuel ratios is challenged