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How to Run a Lathe by South Bend Lathe
Posted on 2010-03-16
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More The screw cutting engine lathe is the oldest and most important of machine tools and from it all other machine tools have been developed. It was the lathe that made possible the building of the steamboat, the locomotive, the electric motor, the automobile and all kinds of machinery used in industry. Without the lathe our great industrial progress of the last century would have been impossible. Early Screw Cutting Lathe One of the earliest types of turning lathes was the tree lathe, shown in Fig. 1. A rope attached to a flexible branch over head was passed around the work to revolve it. Later a strip of wood or "lath" was used to support the rope, and this is probably why the turning machine came to be known as a "lathe." One of the earliest screw cutting lathes that we have record of was built in France about 1740. Fig. 2 shows this lathe as it was illustrated in a book published in 1741. A hand crank was attached direct to the headstock spindle. The spindle of this lathe was geared to the lead screw, but there was no provision for changing the gears for cutting various pitches of screw threads. Henry Maudslay Henry Maudslay, an Englishman, gave us the fundamental principles of the screw cutting engine lathe in a small lathe which he designed and built about 1797. On this lathe the gears used to connect the spindle with the lead screw could be changed, permitting the use of different gear ratios for cutting various pitches of screw threads. Early American Lathes Lathes were built in the United States between 1800 and 1830 with wood beds and iron ways. In 1836 Putnam of Fitchburg, Massachusetts built a small lathe with a lead screw. In 1850 iron bed lathes were made in New Haven, Connecticut, and in 1853 Freeland in New York City built a lathe, estimated 20 in. swing x 12 ft. bed, with iron bed and back geared head. The Modern Bench Lathe A modern geared screw feed bench lathe is shown in Fig. 4. This lathe has change gears to connect the spindle with the lead screw for cutting various pitches of screw threads and for power turning feeds, but does not have power cross feeds. can you supply the password for this file thanks
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