Machine Tools and Workshop Practice for Engineering Students and ApprenticesLongmans, Green, and Company, 1905 - 444 страници |
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Страница ix
... caused a division in the class of operatives . Many machines are working automatically on repetition work with a result quite as surprising as it is satisfactory . This has , therefore , caused a specially skilled class of tool - makers ...
... caused a division in the class of operatives . Many machines are working automatically on repetition work with a result quite as surprising as it is satisfactory . This has , therefore , caused a specially skilled class of tool - makers ...
Страница 12
... causes inconvenience and irritation in trade . Had the Board of Trade described the gauge as the British Standard Wire Gauge ( B.S.W.G. ) , all other gauges would have been disestablished , and much inconvenience and confusion prevented ...
... causes inconvenience and irritation in trade . Had the Board of Trade described the gauge as the British Standard Wire Gauge ( B.S.W.G. ) , all other gauges would have been disestablished , and much inconvenience and confusion prevented ...
Страница 15
... caused to advance 250 5000 of an inch . At the opposite end of the machine is a similar screw of 20 threads per inch , but with a graduated wheel having 500 divisions , and above the poppet a vernier is located , thus causing a reading ...
... caused to advance 250 5000 of an inch . At the opposite end of the machine is a similar screw of 20 threads per inch , but with a graduated wheel having 500 divisions , and above the poppet a vernier is located , thus causing a reading ...
Страница 31
... cause them to dip and yield at every revolution of the work . Whereas in sound , solid castings a - in . drill could be first passed through the work ; then a second drill would be inserted , leaving just a scraping cut for the reamer ...
... cause them to dip and yield at every revolution of the work . Whereas in sound , solid castings a - in . drill could be first passed through the work ; then a second drill would be inserted , leaving just a scraping cut for the reamer ...
Страница 34
... causing much care and judgment in the fitting and finishing stages . Where , however , it is not the practice to make moulds other than from wood patterns , or partly iron and partly wood , it frequently becomes a case for the turner to ...
... causing much care and judgment in the fitting and finishing stages . Where , however , it is not the practice to make moulds other than from wood patterns , or partly iron and partly wood , it frequently becomes a case for the turner to ...
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addendum circle adjustable angle plate B.Sc bearings bevel bolts boring calipers carried cast iron centre change wheels chisel chuck cone crank Crown 8vo cutting edges cutting tools cylinder Diagrams diameter diametral pitch disc drill driving ELEMENTARY emery wheel engine feed finished fitted fixed forged gauge gear grinding grinding machine grip groove ground guide screw hammer hardened headstock heat holes hydraulic Illustrations jaws lathe length lever machine tools mandrel measured metal mild steel Millimetres milling cutter milling machine motion number of teeth obtained operated parallel piece pinion piston pitch circle placed planing machine position practice pressure pulley reamer rest revolutions per minute revolving rivet rotated saddle screw threads secured shaft shown in Fig side slide slot speed spindle square standard surface taper threads per inch tooth turned turret vertical worm wrought iron
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