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18.5.7
Thread dial indicator (for resumption of the pitch)
Do not engage the lock nut if the lead screw rotates at more than 200 revolutions per
minute or if the carriage lock is locked, otherwise damage may be caused to the
bearings or the shear pin of the spindle may break!
On the lower end of the thread dial indicator shaft there are several gear wheels with different
numbers of teeth to be able to turn metric threads with different thread pitches. The vertical
position of the thread dial indicator is changed as required so that the gear selected for the desired
thread pitch engages with the lead screw.
HOLZMANN MASCHINEN GmbH www.holzmann-maschinen.at
NOTICE
The thread dial indicator (1) can also be used for cutting metric threads.
The thread dial indicator (to resume the pitch) is located on the right of
the apron.
The thread dial indicator has an important function. It indicates the
correct moment to engage the " shift lever tapping (lock nut)" (2), so that
the tool takes up the same turn again at each step.
On the dial of the thread gauge there are the numbered
lines 1, 3, 5 and 7. In between there are lines without
numbering, so called half lines. When the lead screw is
engaged, the dial rotates.
There is only one line mark (fixed line) on the housing of the
thread dial indicator.
The table on the side of the gearbox housing (see illustration
on the left) shows the pitch, the selection and the coupling
sequence of the marks on the rotating dial with the fixed
mark. The numbers in the line "→" refer to the numbering of
the graduation marks on the thread dial indicator. For
threading, engage the lock nut at the height of the
corresponding number indicated in the table.
OPERATION
75
ED1000KDIG | ED1500KDIG
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