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Release the rotary handle when 2 to 3 thread turns are cut.
The thread-tapping jaws open automatically via a longitudinal stop lever when the thread
has been fully cut.
Switch off the machine by taking your foot off the safety pedal.
Thread-tapping in 2 work steps (only 2½"...4"):
To tap a thread on a pipe with a large diameter with low
tension, first use the 2-step thread-tapping pin (black) for
thread-tapping (pre-tapping) and then the selector pin (sil-
ver) for tapping (post-tapping) standard threads.
For the standard thread-tapping head:
Lower the thread-tapping head and move the opening and closing lever (3) down towards
you.
Switch on the machine with the pedal, turn the rotary handle clockwise so that the thread
jaws press on the workpiece.
Release the rotary handle when two to three threads have been cut.
With the machine running, slowly move the opening and closing lever (3) up when the re-
quired thread length has been cut, so as to end the cutting process by slowly opening the
thread jaws.
If the thread jaws are opened jerkily, steps can be created in the last section of the thread,
with the result that the thread is faulty!
5.8
Setting the thread length (only Automatic thread-tapping head)
The thread length was set by the manufacturer but can be changed if required.
Pull the Locking Lever toward A to open Die-Head.
Loosen Lock Nut and turn Adjust Screw clockwise
depending on the required thread length.
Right turning makes the thread length longer and left
turning makes it shorter. The thread length will be ad-
justed about 2.5mm by one rotation.
After adjustment, tighten Lock Nut.
5.9
Setting the thread depth (only automatic thread-tapping head)
Loosen the Block Screw securing the Selector Block to the
Cam Plate.
Move the Selector Block to adjust the thread depth. Sliding
toward G makes deeper threads and H makes, shal-lower
threads. The thread depth will change by 1.5 to 2 threads
under or over by one scale.
Tighten the Block Screw to secure Selector Block and start
threading.
With the aid of a measuring instrument, check the cut pipe for a tapered thread etc. and correct
the setting if necessary.
5.10
Removing the workpiece
The workpiece is damp and slippery from the thread-tapping oil. Carefully ensure that it
does not slip out of your hands and drop onto your feet when you remove it from the
machine!
Turn the feeder hand wheel anti clockwise and move back the tool carriage.
ENGLISH
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