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normal rotation of the feed rate is much lower than the thread cutting. Therefore, it is very
important that, when cutting threads, the combination of the gears must be checked to be
correct. The lathe is set up according to the normal rotation speed before delivery from the
factory. When machining different threads later on, the combination of the gears are required to
be changed frequenly.
Warning
！
Very dangerous! Pay close attention to the feed rate before closing the automatic
feed device. Be alert and ready all the time to stop the power, or otherwise the lathe tool
post will collide against the rotating spindle, causing damage and possible injury!
Use the automatic feed, when in normal rotation
：
1
）
Use the manual feed handwheel to move the lathe tool post to the required position.
2
）
Set the Forward / Stop / Backward lever of the screw to the Forward position.
3
）
Adjust the rotation speed of the machine tool to the speed required.
4
）
Pull the automatic feed lever downward to the automatic feed position.
5
）
Pull the automatic feed lever upward to the automatic feed stop position.
6
）
The automatic feed can also be operated in the opposite direction, shutdown the lathe
and change the direction.of the screw.
4.7 Change Gears
There are various gear combinations for a variety of different feed rates in this machine tool
and so there is a comparison table posted on the machine body to explain how to select the
gear combinations for each thread. The standard size is the metric thread (Note: This lathe is a
metric machine tool, the inch thread is an approximate value and, if required to process the inch
threads, it is required to purchase an Inch machine tool).
Comparison Table
：
You can, according to the size of the thread, find out the appropriate gear combinations
and, by setting up the automatic feed rate, machine the thread you want.
Note! There are many details of the thread cutting not included in this manual, for example,
the cutting tools the cutting speeds and the detailed relationship with the different types of
metals. If you do not have this knowledge, please consult professionals before proceeding!
