John Jacob Holtzapffel · digital reprint by www.CircuitousRoot.com · leaf 547
nt pin is then placed to prevent the oval chuck from travelling upwards beyond this horizontality when the mandrel is turned from the operator. The work is next raised by the mainscrew of the spherical chuck to bring the diametrical line a, d, to the height of center, and as this line is both the… … oval ring is thrown out to an eccentricity equal to half the dif- ference between these two diameters. With the mandrel turned one quarter round towards the operator the fixed or revolving tool in the sliderest, the latter clamped parallel with the lathe bearers, is then adjusted laterally upon it…
Ornamental turning
Internet Archive · Dr. David M. MacMillan · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Volume I.]](https://img.insideoutlibrary.com/img/200/erara-31314765-518-3.webp)
