Thread Cutting - Jet GH-2040ZH Mode D'emploi

Micro finishing and calibration cut:
Depth of cut
Feed per revolution
When roughing big diameters reduce the depth of cut!
6.5 Rapid traverse
Move the feeding lever (14, Fig 2):
- left /right for longitudinal feed.
- up/down for cross feed
Push the green rapid feed button on top of the lever to
speed up the movement.
Rapid longitudinal feed disengages the apron
handwheel.
Safety Note:
Rapid cross feed may only be used when the
Cross-handwheel is disengaged (pulled) and the handle
is layed flat.

6.6 Thread cutting

Threading is performed in multiple passes with a
threading tool.
Each depth of cut should be about 0,2mm and become
less for the finishing passes.
Set the thread pitch select levers (1, 20, 22, 23, Fig 1)
in proper position.
Note:
Coarse threads may only be cut at low spindle speeds.
A) To cut inch and metric threads
Set the machine up for the desired threading pitch and
first depth of cut.
0,2mm
0.06mm
Engage the halve nut (15, Fig 2).
The halve nut must be engaged during the entire
threading process.
- Start the machine at the lowest
- When the tool reaches the end of cut, stop the
motor and at the same time back the tool out of the
part so that it clears the thread (Attention inertia: Stop
the motor in time)
- Reverse the motor direction to allow the cutting tool
to travel back to the starting point.
Repeat these steps until you have obtained the
desired results.
B) To cut metric threads with threading dial:
On most metric threads the threading dial can be
used.
The halve nut can be opened at the end of cut, rather
than the motor being stopped and reversed.
The halve nut may only be engaged at the
corresponding graduation match on the threading
dial.
For thread pitches of 1 / 1,5 / 2 / 3 / 4 / 6 / 12 mm, the
halve nut can be engaged anytime.
(lead screw pitch =12mm =dividable by thread pitch).
13
spindle speed.