All measurements are then laid out and the design is cut, changing the
stock in the lathe when necessary. Care should be taken that the sharp
ridge left on the work forms a straight line the full length of the
stock. After the design has been finished, the stock is centered on the
true center and a very thin cut is taken the full length of the object
to remove the sharp corners. The model is then sandpapered while the
lathe is running very slowly.




CHAPTER VII

DUPLICATE TURNING


Under the head of duplicate turning have been classified only such
models as clearly indicate the necessity of making two or more articles
to complete the model or set of articles desired. But it is not intended
to convey the idea that other models may not be made in duplicate as in
many cases it is very desirable and even preferable that they should be
made that way. Whatever the problem may be the suggestions offered at
this point may be applied effectively.

Whenever two or more models are to be made identically alike there are
always two possibilities of inaccuracies that will render the work
dissimilar: First, inaccurate measuring both for length and points of
new diameters and also on the new diameters themselves; second, a
variation in the curved surfaces either on long convex or concave cuts.