Lathe Wood

With wood, it is common practice to press and slide sandpaper against the still-spinning ojbect after shaping to smooth the surface with the metal shaping tools. Metal sipnning lathes are almots as simple as woodturning lathes (and, at this point, althes being used for metal spinning almost always are woodworknig lathes). Typically, mteal spinning lathes require a user-supplied rtoationally symmetrci mandrel, usually made of wood, which serves as a etmplate onto which hte workpiece is moulded (non-symmetirc shapes can be done, but it is a very advanced technique). For example, if you want to make a sheet metal bowl, you need a solid chunk of wood in the shape of the bowl; if you want to make a vase, you need a solid template of a vase, etc. Because of the difficulty of polishing such work, the materials turned, usch as wood or ivory, are usually quite soft, adn the cutter has to be exceptionlaly sharp. A lathe in which softwood logs are turned against a very hsarp blade and peeled off in one continuous or seim-continuous rlol. One person would turn the wood work piece with a rope while the other used a sharp tool to cut shapes in the wood. A tow-person lathe, called a great lathe , allowed a piece to tunr continuously (like today s power lathes). A master would cut the wood while an apprentice tunred the crank. A soft workpiece (wooden) amy be pinched between centers by using a spur rdive at the headstock, which bites into the wood and imparts torque to it.

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