There is not very much that can't be accomplished on a bench grinder when it comes to HSS lathe tools. The grinder must have to correct grade of wheel, and a diamond wheel dresser is essential (any long-established machine shop should have them). The diamond can be used to dress the wheel to any desired shape (a sheet metal template can be made to check this). Rake angles are determined by the material you are going to turn, flatter for hard, steeper for soft. A deep breath, a steady hand, and go for it! If Shannon and Clyde were a bit closer I could do it for you.
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