Whoa !! using acid as a dip process on mild steel that is in the scenario of a high speed reel is definitely not a good method as it creates Hydrogen Embrittlement of the steel. It is something I can't and won't endorse. BTW 15% Sulphuric solution is the better option for Pickling mild steel opposed to Hydrochloric, but the same rules apply regarding embrittlement.
My background was working with acids and plating and it's something that always sticks in my mind. I know that it sounds good and quick but with that comes a trade off. Unless you've got a heat treating oven that can be used to stress relieve the steel afterwards it's a definite no no for steel that's being used for blades.
Also using electrolysis has the same result. It must be heat treated afterwards. Panel work items no issue but blades and stress related parts are off limits in my book.
All those gears are probably still good to go for another round, but in saying that the cutter sprocket is certainly getting on a bit and at the same time I would also change the transfer shaft sprocket along with the primary drive chain.to keep it all running sweet, that's if you are keeping this one for yourself which I think you are.
Like I've mentioned they will all survive for now but my observations are merely a guide.
Cheers, BB.
I live a 24 Hour lifestyle, but every now and again I seem to fall asleep, well at least that's what my wife tells me.
