12
MOUNTING JAWS
The standard SuperNova
2
Chuck is provided with either 50mm or 75mm add-on jaws. They need
to be located and screwed on to the jaw slides of the chuck. The same procedure outlined below
must be followed for all accessory jaws as well.
IT IS IMPORTANT TO LOCATE JAWS PROPERLY IN THE JAW
SLIDES FOR THE CHUCK TO FUNCTION ACCURATELY. Refer to
FIGURE
Follow the method set out below -
1.
You will notice that the back of the jaws have a stepped location ring. This location ring is
designed to fit into the grooved section of the jaw slide for precision location. Ensure that
the slide and collet back are clean and free from any burrs or damage that might affect
location. Place the jaw segment over the hole positions on the jaw. Press the jaw
segment firmly onto the jaw slide. For the first few times you may need to GENTLY tap
the jaws into the locator slot with a block of wood.
2.
The screws can now be screwed in, using the 4mm Allen Key provided. Lightly grease or
oil screws under each head and on the threads before use to prevent the screws from
seizing in the jaw. Preferably use an anti-seize compound e.g. ROCOL J 166 Anti-Seize
Compound. Do all screws up finger tight and then back them off one quarter to half a
turn.
3.
Wind the mounted jaws into the centre of the chuck until they all butt against the other.
Now finally tighten screws, starting with centre screws and then outside screws. Nip
screws up firmly but DO NOT OVERTIGHTEN.
4.
Check there is no light between jaw slides and add on jaw segments or that one or more
segments is not higher or lower than the rest. If this is the case repeat procedure above.
OPERATING MODES
SCREW CHUCK
This is a convenient mounting method. The woodworm screw is purpose-designed for screw
chucking. It is a cylindrical screw which maintains its full holding power along the whole length,
unlike normal tapered screws. The thin thread form is specially designed to cause minimum
damage to wood fibres. They grip better than screws with thicker threads because there is a
larger volume of undamaged wood retained within the screw.
The woodworm screw is made complete with the boss section in one piece. The woodworm
screw is designed to be used with the 50mm jaws remaining in place on the chuck. This facility is
very convenient for remounting work directly onto the jaws after the screw is removed.
To convert to this operation, place the boss section into the centre of the chuck making sure flat
