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Keywords: Nasmyth milling machine 1829-1830--001.png The milling machine built by James Nasmyth between 1829 and 1831 for milling the six sides of a hex nut using an indexing fixture From Nasmyth's own account published in Robertson Buchanan Practical essays on mill work and other machinery London 1841 Appendix B and Plate XXXIX Republished in Woodbury 1972 1960 25 1841 James Nasmyth PD-OLD Milling machines PD-old-100 |