E&OE
© 2020 Baumr-AG
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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.
Fixed and Moving Steadies
Fig. 15 illustrates the Fixed Steady (A) and Moving Steady (B) assembled to the lathe, used to support a long
workpiece.
How to Use a Thread Dial Indicator (Optional)
Mounted on the Apron, adjacent to the Auto Feed Lever, is the Thread
Dial Indicator, shown in Fig. 16. This is permanently connected to the
leadscrew and, as the leadscrew turns, the 'dial' spins. Eight radial
marks are etched on the dial and these are used to determine the
exact position of the leadscrew thread in relation to the saddle.
The numbers in the 'SCALE' column refer to the numbers on the radial
lines on the Indicator Dial. Therefore, if a 20TPI thread is to be cut for
example, the marks 1, 3, 5 or 7 may be used. You should now
proceed as follows:
53. Observe the spinning Dial. Concentrate on one of the numbered
marks etched on the dial which corresponds to the scale number
given in the Indicator Table. (In the example, this could be 1 ,3,5
or 7). As your line passes the mark on the body of the dial
indicator, engage the auto lever sharply and thread cutting will
commence.
54. As the tool approaches the end of the desired thread,
DISENGAGE THE AUTO FEED LEVER
. Do not
switch the machine OFF.