Precision

A few nice precision milling machined parts images I found:

Box of Goodies

Image by tudedude
Kit of parts for conversion of Mini Mill from Gear to Belt Drive

Image from page 329 of “Appleton’s dictionary of machines, mechanics, engine-work, and engineering” (1861)

Image by Internet Archive Book Images
Identifier: appletonsdiction02appl
Title: Appleton’s dictionary of machines, mechanics, engine-work, and engineering
Year: 1861 (1860s)
Authors: Appleton, firm, publishers, New York. (1852, D. Appleton & Co.)
Subjects: Mechanical engineering
Publisher: New York : D. Appleton

View Book Page: Book Viewer
About This Book: Catalog Entry
View All Images: All Images From Book

Click here to view book online to see this illustration in context in a browseable online version of this book.

Text Appearing Before Image:
hen the whole system is in equilibrio, the index b o is at zero of thearc M N. With a view to a perfect adjustment of the index, the water-vessel q is supported in a ringof brass at the extremity of a rod q, movable in a tube k, Fig. 2700: this tube is attached to a slidingpiece b h, acted on by a milled head at h and a screw within the cylinder, which is fixed to the stageA B, so that the water-vessel may be easily raised or depressed by a small quantity, and thus the indexbe regulated to zero of the arc with the greatest precision; for it is evident, by the construction of theinstrument, that the position of the index will depend on the greater or less immersion of the cylindricalcounterpoise a u, the weight of which being once adjusted to a given line of immersion, and a givenposition of the wheel W and index O, any elevation or depression of the water-vessel q must necessarilymove the wheel. The counterpoise aw is about 1-J inch in length and full 3 of an inch in diameter: a 2699.

Text Appearing After Image:
small ball of lead is attached to its lowest part, in order to give it a sufficient immersion, and at the Phil. Trans, for 1792, p. 86. MAGNET—MAGNETISM. 321 same time balance the iron cylinder t when the float is about half immersed in the water. With a viewto a final regulation of the weight, a small hemispherical cup a is fixed on the head of the counterpoisefor the reception of any further small weights required. This counterpoise is accurately turned out offine-grained mahogany, and is freed from grease or varnish of any kind, so as to admit of its becomingeasily wetted in the water. The column A E supporting the stage A B consists of two tubes of brass, one, G, movable withinthe other, E C, so that by a rack on the sliding-tube G, and a pinion on the fixed tube at C, the wholeof the parts just described may be raised or lowered through given distances, as shown by a dividedscale G, adjustable to any point by means of a slide and groove in the movable tube G. The brasstubes com

Note About Images
Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability – coloration and appearance of these illustrations may not perfectly resemble the original work.