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Title: |
1900 Article-Smith & Coventry, Open-Spindle Turret Lathe |
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Source: |
English & American Lathes, 1900 pgs. 129 & 130 |
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Insert Date: |
12/20/2012 8:32:01 PM |
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The type of turret lathe which is much more common in English shops than any other is that illustrated in Figs. 232 and 233. It has retained its place for over thirty years, subject to improvements and mortifications. The illustrations given are those of Messrs. Smith & Coventry, of Manchester, who were the pioneers in this class of lathe; but other manufacturers have imitated them very closely. It differs almost entirely from any American types, whether used by engineers or by cycle-makers, but it is deservedly popular here. There is no wire-feed, no friction-gear in the head, and the chasers are not carried in the turret. But it is admirably suited for the general small repetitive work of the engineers' shop. The open-sided hollow spindle is a valuable feature. It is so stiff, and its bearing-area so large, that heavy cutting is easily done. The movement of the spindle can be arrested by the tumbler-brake—seen under it in Fig. 233—when the chuck is being tightened around a bolt. Bolts with square or hexagon heads are easily inserted through the open sides of the spindle. The chaser-holder is indexed. A poppet is fitted when required, as in Fig. 233, to increase the range of utility of the lathe. |
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1900 Smith & Coventry, Open-Spindle Turret Lathe
1900 Smith & Coventry, Open-Spindle Turret Lathe (Rear View)
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