. Metal spinning . Fig. 23. Another Brass Spinning Operation ; the Chuck used is shown at A only were made. When a single finishing chuck is used, the variousoperations in spinning a shell of this kind would be left to the judg-ment of the spinner, who would decide the limit of the stretch ofmetal between the operations before annealing. A brass shell that is made in five operations and with four anneal-ings is shown in Fig. 23. The finishing chuck used is a split or keychuck on which it is necessary to cut out the end of the shell in order 22 No. 57—METAL SPINNING to withdraw the key after th
. Metal spinning . Fig. 23. Another Brass Spinning Operation ; the Chuck used is shown at A only were made. When a single finishing chuck is used, the variousoperations in spinning a shell of this kind would be left to the judg-ment of the spinner, who would decide the limit of the stretch ofmetal between the operations before annealing. A brass shell that is made in five operations and with four anneal-ings is shown in Fig. 23. The finishing chuck used is a split or keychuck on which it is necessary to cut out the end of the shell in order 22 No. 57—METAL SPINNING to withdraw the key after the shell is spun. This shell, which isshown finished to the right, is 5^ inches long. It is spun smooth ona machine steel chuck, and is not skimmed, but gone over with aplanishing tool at the last operation. The two pieces shown in were also finished in this Fig. 24. An Example of Air Spinning and the Chucks used Fig. 24 shows a brass shell, which is a good example of air spin-ning, so called because the finishing or second operation on part ofthe shape is done in the air, thus avoiding the use of a sectional orsplit chuck. The shell shown is about 5^ inches in diameter. Thefirst or breaking-down chuck is shown at A. The neck or small part
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Keywords: ., bookcentury1900, bookdecade1910, bookidmetalspinnin, bookyear1912
