25
C. Cross-slide Adjustments
Cross slide adjustments are made in the same way as those for the compound
slide. The jib screws however are hex socket head screws and are to be found on
the right hand side of the slide, i.e. facing the tailstock.
NOTE:
It is important that the cross-slide and compound slide adjustments are correctly carried
out and that there is no ‘sloppiness’ of action. Any maladjustments will have a serious
effect on the quality of your work, as they will all be transferred to the tool tip.
It is vital that there is as little movement of the tool as possible.
D. Fitting External Jaws - 3-Jaw Chuck
To change the jaws, insert the chuck key and open the jaws to their fullest extent.
It will then be possible to remove each jaw in turn.
Replace them with the external jaws, noting the following.
The thread segments of the jaws are progressively ‘stepped’ as shown in Fig 24.
They are also numbered 1 to 3. This is to take into account the lead of the screw
thread within the chuck. It is therefore necessary to assemble the jaws in the
correct order.
Place them as shown in the Fig. 24, and assemble in the same order, clockwise
in the slots in the chuck, turning the chuck key as you insert them. Close the
jaws fully and check to ensure they all meet at the centre. If a jaw is out, open
the jaws fully, and retain pressure on the jaw in question whist turning the chuck
key, until it snaps down into position. Re-check to ensure all jaws meet at the
centre.
Fig.24
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