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Title: |
1900 Article- Joseph C. Nicholson Tool Co., Gap-Bed Lathe |
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Source: |
English & American Lathes, 1900 pg 16 |
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Insert Date: |
12/14/2012 12:32:52 PM |
The standard type of English gap bed is illustrated in Fig. 32. It is by the Nicholson Tool Co., of Newcastle-on-Tyne. It may be noted in connection with this and other Figs, that the strong objections to the gap which the Americans make, on the supposed ground of its weakening effect, are met by the compensations made, not only in the stiffening of the metal beneath, but in the invariable practice of either putting an extra standard underneath, as in this Fig., or in carrying the bed beneath the gap down to the floor, as in Fig. 33, and other examples. This remark, of course, applies only to the heavier class of lathes ; the light ones do not require it.
In Fig. 32 the ways are flat and edges vee'd, the lead-screw is distinct from the feed-shaft, which is behind, and through which the sliding and surfacing are effected. The reversing gears are outside the head, enclosed partially in a box. The slide-rest is massive, bearing surfaces are ample, the toolbox has four bolts. The rest is connected to the screw in front, to the shaft behind, and quick hand traverse is effected through the rack. The lathe is in almost every detail typical of thousands of standard English lathes in our workshops to-day, and we shall have occasion to refer to the type several times. |
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