LATHE OPERATIONS - OD1645 - LESSON 1/TASK 1
FIGURE 25.
POSITION OF THE CUTTER BIT FOR FACING.
inch of the workpiece diameter.
In a horizontal plane, the bit and the
holder should be positioned at right angles to the workpiece axis or at a
slight leading angle so that the bit will not dig into the workpiece if the
bit or the toolholder should accidentally work loose.
(5) Straight Turning Operation.
As a rule, the workpiece is turned down
by a number of roughing cuts to a predetermined diameter which is within
1/32 to 1/64 inch of the diameter desired. The remaining metal is removed
by a finish cut using a fine fed to produce a good surface. After taking
the first roughing cut along the entire workpiece surface check the center
alignment by measuring each end with calipers. If the ends are of
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