I ran blades for a couple seasons and never had wings get so thin they break off..must be the sand down there,,up here we have alot of clay and good top soil.
I've tried your method and I find it's:
- much faster than using a bench grinder
- it's much easier to maintain the factory angle due to better visibility
- removes much less material
- generates much less heat so there's no need to quench
- produces a lovely flat & even finish.
I second that. For years I used a bench grinder for sharpening blades. Even when using a big industrial size one at work, I found it slow and it required continuous quenching so as not to overheat the blade. An angle grinder with just about any kind of cutoff wheel is much better. I discovered that method when I couldn't find a breaker bar long enough to remove one of my blades and decided to do it in situ with my angle grinder instead. Necessity is the mother of invention.