LATHE OPERATIONS - OD1645 - LESSON 1/TASK 1
(d) Straight Parting Cutting Toolholder.
The straight parting cutting
toolholder (figure 9) is a forged steel holder shaped to hold flat, thin-
sectioned parting tools which are used to cut and separate pieces of stock
on the lathe.
(e) Right-Band and Left-Hand Offset Parting Cutting Toolholder.
right-hand and left-hand offset parting cutting toolholders (figure 9) are
similar to the straight parting cutting toolholder but are designed to hold
the parting cutter bit at an angle to the holder shank.
toolholder is generally used when the workpiece is to be parted, because the
stationary parts of the lathe may interfere with the holder if the straight
parting-cutting toolholder is used.
In either case, the compound rest of
the lathe must be adjusted so that the parting cutter bit enters the
workpiece at the correct angle (perpendicular to the workpiece).