Turning is a process used to make parts that have axial symmetry.
In turning operations the workpiece is spun in a
lathe and cut by a stationary cutting tool. Lathes are specialized for
milling round objects and can
achieve higher tolerances and performance for such operations.
The following are some common turning operations:
- Turning is used to cut both external and
internal threads. This is commonly used on such items as
nuts, bolts, caps, and and pipe fittings.
- Form Turning
- In form turning a die with a certain
profile is used to impart the inverse profile on the turned part.
Both internal and external forms are possible.
- Drilling and Boring
- By placing a drill bit or boring
bar in the tail stock of the lathe, holes can be drilled on the axis of
the turned part. This is much more accurate than drilling with a drill
- Knurling is used to impart a texture on the
surface of the part.
- Parting is used to separate the workpiece from
the stock material.