The Advanced Machinist: a Practical And Educational Treatise, With Illustrations
The Advanced Machinist: a Practical And Educational Treatise, With Illustrations
Hawkins, N. (Nehemiah), 1833-
The book The Advanced Machinist: a Practical And Educational Treatise, With Illustrations was written by author Hawkins, N. (Nehemiah), 1833- Here you can read free online of The Advanced Machinist: a Practical And Educational Treatise, With Illustrations book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is The Advanced Machinist: a Practical And Educational Treatise, With Illustrations a good or bad book?
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62. The lathe, with its two headstocks, is admirably adapted for all kinds of work supported by the two heads directly, or supplemented by supports or steady rests. When boring and facing have to be done on the headstock, disadvantages and defects are encountered ; the work must of necessity overhang when fixed on the hori- The Advanced Machinist. TURNING AND BORING. zontal spindle, causing vibration, etc. Another defect of the horizontal lathe, when used for boring, is the difficulty of settin...g and securing the overhang work to the face- plate. The illustration, page 100, is a lathe designed for screw-cutting by the means of the lead-screw shown on the front. Fig. 62 shows a lathe for turning, boring and screw- cutting; it has self-acting longitudinal and cross feeds, actuated by the spline feed spindle in front, on which is a sliding worm geared into a worm wheel on the carriage ; the screw-cutting mechanism is actuated by the long leading screw shown in front, under the rack which is fixed to the shears or slides of the lathe.
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