LATHE OPERATIONS - OD1645 - LESSON 1/TASK 1
f.
Rests.
(1) General.
Workpieces often need extra support, especially long, thin
workpieces that tend to spring away from the cutter bit.
Two common
supports or rests are the steady rest and the follower rest.
(2) Steady Rest.
The steady rest or center rest, as it is also called
(figure 20), is used to support long workpieces or shafts being machined
between centers or for boring operations.
It is also used for internal
threading operations where the workpiece projects a considerable distance
from the chuck or faceplate. The steady rest is clamped to the lathe bed at
the desired location and supports the workpiece within three adjustable
jaws. The rest prevents the workpiece from springing under cut, or sagging
as a result of the otherwise unsupported weight.
FIGURE 20.
STEADY/CENTER REST.
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