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Title: |
1888 article - 36" engine lathe |
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Source: |
May 1888 Mechanics |
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Insert Date: |
6/7/2017 3:17:33 PM |
IMPROVED ENGINE LATHE.
The lathe which is shown in the accompanying illustration is one of a series of powerful and well-designed tools built by Israel H. Johnson, Jr. & Co., of Philadelphia, and will be found to have many points of superiority and excellence. It is nominally a thirty-six lathe, hut swings 37½ inches over the ways and 29 inches over the carriage, and is heavily belted and powerfully geared.
The cone has live changes for a four-inch belt, the largest section being 23 inches in diameter; it is back-geared ten to one, and triple-geared to the face plate thirty-four to one. giving fifteen changes of speed.
The boxes are of composition metal, the front bearing being 6 inches in diameter and 10½ inches long; the spindle is of best hammered crucible steel and the racks, pinions and screws are also of steel.
The apron is provided with independent patent split ring, lever and cam frictions for lateral and cross-feeds, driven by bevel pinion on a long sleeve sliding on a splined lead-screw and supported in a sliding bracket, which gives the reverse motion to the carriage-feeds and also locks the lead-screw nut and prevents both nut and frictions from being thrown into operation at the same time.
The hand-wheel and gearing in the apron can be disengaged when cutting screws; there are cone feed-gears and pin on the head, giving three grades of feed without changing gears.
The gibbed carriage is fitted with a compound tool-rest, with two slots for tool-posts, power cross-feed and rest for turning the full swing of the lathe.
All dovetail slides are fitted with taper gibs and adjusting screws to provide for wear.
The workmanship on these tools is of the highest class, and they are in every way adapted for accurate and reliable work.
Further particulars concerning these lathes or other machine tools may W obtained from the makers, Messrs. Israel H. John, son, Jr. & Co., 1424 Callowhill Street, Philadelphia. |
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