In turning operations, diameters usually are measured with micrometer calipers, although spring
calipers may be used to check roughing cuts or where close accuracy is not required. The method of
making length measurements is controlled, primarily, by the shape and accessibility of the surfaces over
which measurement must be made.
Spring, hermaphrodite, venire, or micrometer calipers or micrometer depth gages can be used.
The reason for this is that if the angle on the end of the barrel is off, one side of the barrel will be thicker
than the other. In turning, the barrel will probably warp. Now that the barrel is squared, put the faceplate
on the lathe.
Take a bar of steel that is 24 inches long that has centers in each end and has been turned true.
You will need to set the tail stock to an exact .0000 setting so that there is no taper in the OD of the liner
when finished. Set the dial indicator on the carriage of the lathe, set it to 000, and set the tail stock over
a bit. Crank the carriage down towards the head stock to where the mark is on the barrel. Check the
reading on the dial indicator, and if it is not right, reset the tail stock and repeat the process until you get
0.0104.
Having now completed setting the tail stock to .0000, set the barrel blank between the centers, and
clamp a lathe dog on the head stock end.
Use a standard faceplate with the centers to hold the barrel.
LATHE CHUCKS
Lathe chucks are used to support a wider variety of work piece shapes and to permit more operations