Lead Screws, Gears, And Pantographs, 1920's-SHIPPING INCLUDED!
$6.95
articles from
Machinery Magazine
reprinted
by Lindsay Publications
Knuckleheads
insist you must have a lathe in order to build a lathe. If that's true, then
how was the first one made? Similarly, you don't need a precision master
screw to cut another screw thread. Someone must have made the first precision
screws from scratch. How was it done? Holtzapfel reveals some techniques.
Maudsley made his own two hundred years ago.
You'll learn
the secrets of making precision screws for scientific instruments including
preparation, cutting, recutting, and especially the lapping that removes
residual errors. This is the same technique documented in a classic Amateur
Scientist article in the 1950's. And the lap is similar to the 1000 threads
per inch Merton nut mentioned in the 1930's in an article in the Review of
Scientific Instruments. Great stuff for the precision fanatic. Oh! Be prepared
to make measurements with an interferometer!
Another article
will show you how a 4 foot lathe leadscrew was cut having only 40 millionths
of an inch error across the entire length!
Also learn
how small gears and pinions for clocks, watermeters, etc were mass produced
just after WWI. You may not want to make hundreds of gears, but the basic
techniques are interesting, and the ideas useful.
And if you've
ever considering building a pantograph engraving machine, you'll like this
article from the early 1920's. You'll see many different machines, each with
its own application and benefits. You'll see drawings of bearings, cutters,
sharpeners, layouts and more. You also get a photo and a brief mention of
a pantograph capable of die milling and making three dimensional copies.
Best material I've found so far for getting your idea generator
going.
Heavily
illustrated. Same fascinating quality. 5 1/2 x 8 1/2 booklet 48
pages
No.
22326
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