|
Title: |
1893 Article-Pratt & Whitney Co., 13 in. Gibbed Lathe with Rhodes' Rest |
|
Source: |
Pratt & Whitney Catalogue, 1893, pgs. 23-24 |
|
Insert Date: |
11/19/2016 8:33:40 PM |
13-inch Weighted Engine Lathe.
WITH SCREW AND BACK GEARS.
SWINGS 13 inches over the bed and 5¾ inches over the carriage. The front bearing of the head-stock spindle is 1¾ inches diameter and 3 3/8 inches long, in cast-iron boxes, lined with Babbitt-metal. Screw thread on spindle for face-plate 1¾ inches diameter, 8 pitch. The cone, largest diameter 8¼ inches, is driven by a belt 2 inches wide. The hole through the spindle is 9/16-inch diameter. The small feed-gears are of wrought-iron. with the usual set of gears, screws may be cut with threads of 4 to 64 to the inch. The rear view of the lathe shows the Slate Taper Attachment. Stationary and follow rests, large and small face-plates, countershaft and Wrenches are included with the lathe. Speed of countershaft, 10x3-inch friction pulleys. 140 revolutions per minute. Lathe with 4-foot bed receives 1 foot 8 inches between centers, and weighs 1,150 pounds. Beds 4 to 6 feet long.
This size lathe is made also with gibbed carriage, automatic cross-feed, with tool-rest of compound style, or one made under Rhodes’ patent, in which the upper part having its under surface partly concaved bears upon the convex surface of two lugs in the slide to which it is pivoted and on which it rocks. A screw in the rear is used to adjust the rest, and a clamp screw to bind it ?rmly in position.
The lathe can be arranged for cutting threads to the Metric system, by making the head and change gear studs long enough to receive a double train of gears, adding translating gears of 50 and 127 teeth for one train, and using regular change gears for the second train. By this means the same number of threads per centimeter as per inch, and ?ner and coarser threads, may be cut, as well as a greater variety of feeds obtained, than under the regular construction- The extra cost of the mechanism is $512. |
|
1893 Pratt & Whitney Co., 13 in. Gibbed Lathe with Rhodes' Rest
1893 Pratt & Whitney Co., 13 in. Weighted Engine Lathe
|
|