The Three-Jaw Chuck (Fig. 6); Clamping The Workpiece; Reversing The Jaws (Fig. 7); The Rotating Tool Holder - Proxxon FD 150/E Manual

3. By turning the handwheel 5, move the upper carriage 1 with
the cutting tool with the required infeed along the rotating
workpiece.
If a cone or taper will be turned, the upper carriage 1 must be
pivoted by the required amount:
1. By turning the handwheel 5, move the upper carriage 1 so far
to the right until screw 4 can be accessed.
2. Loosen screw 4 and set the required conicity using the mark-
ing on the angle scale 7.
3. Retighten screw 4. Turning the handwheel 5 will traverse the
upper carriage and thus the cutting tool during turning.
Please note that here, just as for the other handwheels of the ma-
chine, the scale rings are moveable and can be set to zero. The
traveled path of the tool can then be read on the scale. One rev-
olution of the handwheel corresponds to one millimetre route.

The three-jaw chuck (Fig. 6)

The chuck 1 serves as a holding fixture and for clamping the
workpieces to be machined. It has a 8.5 mm opening, just like the
work spindle of the machine. Thus, round materials with a rough
diameter of 8 mm can also be guided through the spindle!
When clamping a longer workpiece that is guided through the
spindle and which projects out to the left, there is an increased
risk of injuries. Be particularly careful in this case to prevent ob-
jects from being caught by the rotating shaft. Secure this area
separately.

Clamping the workpiece:

Insert both pins 2 and 3 included in the delivery into the provided
holes at the circumference of both chuck bodies and turn both
chuck parts against each other to open the clamping jaws. The
opposite turning direction causes the jaws to close after the
workpiece has been inserted, thus clamping the workpiece.

Reversing the jaws (Fig. 7):

Fig. 7a shows the configuration of the jaws in the delivery con-
dition. For example, tubes can be clamped from the inside or
round materials can be clamped from the outside. For clamping
larger outside diameters, the jaws can be revised (like shown in
Fig. 7b).
1. Open the chuck far enough that the jaws can be removed
from the chuck.
2. Jaws are double- and guides are single marked with num-
bers. Reverse jaws and insert it in a way so that the left num-
ber on the face side of the jaw corresponds to the number of
the guide.
3. Start with jaw and guide 1! The sequence 1-2-3 has to be ob-
served!
Caution!
4. Press the jaw slightly and turn the in "Clamping" direction un-
til the scroll inside the chuck body has "gripped" the toothing
of the jaw.
5. Insert the second jaw and proceed as in the first.
6. With the third now the same procedure.
7. Then check that all jaws are centered.

The rotating tool holder

Select cutting tool (Fig. 8)

For proper turning, it is imperative that:
• the correct cutting tool was selected for the corresponding
purpose,
• the cutting edge of the cutting tool is sharp,
• the cutting edge of the cutting tool is positioned exactly in the
"Centre"
• the correct rotational speed is used.
Here are the rotational speed types we have put together in our
cutting tool set 24524 (accessories):
Left cutters (a)
• are used to wear off as much swarf in the left machining di-
rection as possible in a short time, without special regard to
the quality of the workpiece surface.
Right cutters (b)
• are used to wear off as much swarf in the right machining di-
rection as possible in a short time, without special regard to
the quality of the workpiece surface.
Roughing tools (c)
• for rough preparatory machining on workpieces. The special
cut of this tool makes it suitable for large material removal
without great requirements regarding surface quality.
Pointed tools (d)
• are used to achieve a clean surface with less chip removal.
Parting tools (e)
• for grooving and for separating the workpiece during parting.
Boring cutters (f)
• are used for interior diameter turning.
Caution!
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