In search of instructions basic tool use, including hand tools, I've been looking at a rather old book: America's Handyman Book, Scribner's sons 2nd edition, 1970. I'm sure it's way out of date, but I haven't found a better source of info, with lots of pictures and clear explanations, that I as an untutored newbie can understand, though Amazon says there was a 3rd edition in 1980.
I like to use a lubricant (originally oil, but I've switched to water because it's less messy - though I'm only using hand tools) when sharpening blades to make a nice clean, smooth surface and keep the sides of the blade smooth.
But many skate pro shops, use no lubricant.
But the book says to use lubricants (like water or oil) to keep tools being sharpened cool, so it doesn't loose it's hardness or tempering.
Does that apply to modern steel alloys such as are in good quality skate blades?
I.E., is it possible that shops that don't lubricate significantly reduce the hardness (a therefore the durability) of the edge, or make the rest of the blade, which is normally tempered to be softer, I guess to be less likely to break, more brittle?
Sparks that come off powered sharpening machines are often hot enough to glow, which suggests the blade get pretty hot.
Am I correct that hand sharpening tools for sharpening skates, like Pro-Filer and Berghman skate sharpeners, are unlikely to get the blade hot enough for these to be a factor?
What about when sharpening other tools, like planes, made of modern steels? That is often done on a powered bench grinder. Do they get hot enough that water or oil are still desirable to prevent changes to hardness and/or tempering?
BTW, does anyone know a good modern book on hand tool use that applies better to modern hand tools and materials?