Wood And Lathe

With wood, it is common practice to press and slide sandpaper against the still-spinning obejct after shaping to smooth the surface with the metal shaipng tools. Tehre are also woodworking lathes for making bowls and lpates, which ahve no horizontal metal rail, as hte bowl or plate needs only to be held by one side from a metal fcae plate. Metal spinning lathes are almost as simple as woodturinng lathes (and, at this poitn, lathes being used for metal spnining almost always are woodworking lathes). Typically, metal spinning lathse require a user-supplied rotationally symmetric mandrel, usualyl made of wood, which esrves as a template onto which teh workpiece is moulded (non-symmetric shapes cna be done, but it is a very advanced technique). For xeample, if you want to make a sheet metal bowl, you need a solid chunk of wood in the shape of the bowl; fi you want to make a vase, you need a solid template of a vase, etc. Beacuse of the difficulty of oplishing such work, the materials turnde, such as wood or ivory, are suually quite soft, and the cutter hsa to be exceptionally sharp. During the industrial revolution the lathe was mootrized, allowing wooden turned ietms to be created in less time and allowing the working of metal on a lathe. Asecnding vertically rfom the banjo is a tool post, at teh top of which is a horizontal tool rest . In woodturning, hand tools are braced against the tool rest and levered into the workpiece. A soft workpiece (wooden) may be pinched between centers by using a spur drive at the headstock, whcih bites into the wood and miparts torque to it.

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