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Title: |
1892 Article-Prentice Bros., 24 inch Double-Geared Engine Lathe |
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Source: |
American Machinist 18 Feb 1892 pg 7 |
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Insert Date: |
12/23/2011 8:47:13 PM |
We give with this an illustration of a new lathe, which has been brought out by Prentice Bros., Worcester, Mass.
The head has double back gears, by which, in connection with the other usual features, twelve even changes of speed are obtained for the spindle, from 4 to 280 revolutions per minute, the back gears being in the ratio of 4 to 1 and 13 to 1.
There is a steel spindle having a main bearing 2½" diameter, 4½" long, running in hard bronze boxes, and provided with a step for taking the end thrust, which is entirely independent of the box, being attached directly to the head stock.
The lower feed cent is adjustable, for the purpose of regulating the tension on the feed belt, or for using change wheels, by which any desired range of feeds may be obtained. Feeds are reversed in the apron of the carriage, and can be thrown out of gear when chasing screws. There is an automatic stop for the carriage, which is useful in turning duplicate pieces to a shoulder. There is an automatic feed and a clamp for clamping the carriage to the bed when using it.
In each leg is a receptacle for gears, tools, etc. The countershaft has improved hub, noiseless friction pulleys and clutch.
Lathes of 14", 16", 18" and 21" swing are, made of the same design, with plain gibbed, rise and fall, or compound rest, or with taper attachment and any desired length of bed. The 24' lathe with 12-foot bed gives 7 feet 2" between centers, and weighs 4,200 pounds. |
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1892 Prentice Bros., 24 inch Double-Geared Engine Lathe
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