Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

What I would like to ask you is what sort of pulley groove do you prefer to do your hobbing on. I realize it can be done on most any form of groove, but am wondering what you find works best a slightly flared U-shaped groove or a V-shaped groove? If you prefer a V-shaped groove, what angle do you find most effective, 90, 120 or some other degree of divergence???

You're overthinking a simple procedure.

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