User Guide

The turning speed for parting should be about one half the normal turning speed and feed
rate should be a little heavy so the chip will not break up in the slot. If speed and feed are
correct, there will not be any chatter, and the chip will come out as if it were being
unrolled. Cutting oil plays a major roll in this occurring properly.
If the tool chatters, first check to see if the work is being held properly. Then decrease
speed (RPM) or increase feed rate or both. Once the blade has chattered, it leaves a
serrated finish that causes more chatter. Sometimes a serrated finish can be eliminated by
stopping the spindle, adding a liberal amount of cutting oil, bringing the blade up so there
is a slight pressure on it without the spindle turning, and then turning by hand or as
slowly as possible with the speed control.
Very small work may be completely cut off when held in a chuck and allowed to fall onto
the crosslide. It is too small and light to cause any damage. Hollow articles, such as rings,
may be caught on a piece of wire whose end is held in a suitable position.
Side Tools
While these may be, and often are, used as general purpose turning tools, their specific
use is for facing the sides of collars and shoulders; that is, finishing these to correct
dimension and with a smooth, flat surface. They are also for facing work held on a
faceplate or in a chuck. The facing of work in this manner is very useful for the
production of truly flat surfaces and for producing articles to an exact thickness. The two
uses of the side tools are illustrated in Figure 11 and 14. The sharp corner at the cutting
point should not be slightly rounded, as may be done with the normal turning tool, as
knife tools may be required to produce sharp corners.
Boring Tool
The use of this tool requires the existence of a drilled or cored hole, or it may be used to
enlarge the bore of a tube. The work must be mounted in a chuck or on a faceplate and
the boring tool set as shown in Figure 24. Note the clearance behind the cutting point as
shown in Figure 16 below.
FIGURE 16--Boring tool clearance.