The manual training school, comprising a full statement of its aims, methods, and results, with figured drawings of shop exercises in woods and metals . Fig. 128. V-threads to the inch. It must be borne in mind that all thecutting-tools except the files and drills are made and kept inorder by the students themselves. Chap. IV.] MA CHINE- TO OL EXER CISES. 145 Ko. 4. (Fig. 129.) Finished handle. Stock If, roundiron, 4| long. The handle is approximately formed and thethread is cut in the engine lathe. In the speed lathe, by the useofliand tools, the free outline of the handle is obtained, and th
The manual training school, comprising a full statement of its aims, methods, and results, with figured drawings of shop exercises in woods and metals . Fig. 128. V-threads to the inch. It must be borne in mind that all thecutting-tools except the files and drills are made and kept inorder by the students themselves. Chap. IV.] MA CHINE- TO OL EXER CISES. 145 Ko. 4. (Fig. 129.) Finished handle. Stock If, roundiron, 4| long. The handle is approximately formed and thethread is cut in the engine lathe. In the speed lathe, by the useofliand tools, the free outline of the handle is obtained, and then. Fig. 129. the main portion is given a high polish. The thread is of thestandard description, so that the handle might replace one onthe lathe itself. No. 5. [Fig. 130.) Bolts and nuts. The stock consists ofblank bolts and nuts with an excess of -^ of material on everyside. Each student makes three of these bolts and three of aslightly smaller size. Every surface is to be well threads in the nuts are cut with a tap, and the three nutsare put in a common mandrel and planed to the requiredhexagonal form in the shaper. Errors in the final dimen-
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectmanualt, bookyear1906
