Hello,
Since most of my Bailey planes are 50-90 years old, and cost little, it was usually about time for a blade replacement when I acquired them. It would have been stupid to replace them with a manufacturers original, wouldn't it? Old castings and a new thick iron makes for a very good cabinet makers tool for little money and a fair bit less fuss than the nay-Sayers would have us believe.
A thick blade in a woodie or infil with a fully supportive frog work beautifully, to a great extent, because of the vibration absorbing mass of the blade/cap iron assembly. But a thick blade in these is not supported lower than the back of the blade above the bevel will allow. Logically a thicker blade in a Bailey is supported as low down as could be, so why the out of hand rejection of the idea from some. Just one component upgraded transforms the plane to a fully functional and fine tool, which can rival LN, Clifton etc. for much less. I think my cabinet of planes, aside from some Veritas additions lately, could be bought for the price of one LN try plane. I have a lot of planes.
Incidentally, when I say the frog is adjustable , I do not mean to say that it is done often. I do it to the optimal setting for the job in hand and leave it that way. It has never been optimal for the frog to be set level with the rear mouth for the work I do and I don't intend disadvantaging myself by setting them this way, because the thin irons are essentially defective. It is ludicrous to say that thin irons are prone to chatter, so keep the iron and adjust the plane so it compensate for this and have it perform poorly in another area because of it. If the original iron is still serviceable, then I effectively have two mouth settings without any adjustment other than a blade swap. Brilliant. Better still, since used examples of these planes are dirt cheap, I have more than one plane of often used types, with different mouth settings for different conditions. Like Antonio Banderas in Deperado, I just cast one weapon aside and pick up the next. Come to think of it, once I am set, I nearly never adjust the depth of cut. I just swap plane and go! Efficient! I'm not suggesting everyone should have lots of planes, but let us face it, we all do! A smoother with a fine mouth, one with a super fine mouth and super fine cut and another with a back bevel and I can tackle anything.
Mike.