Threading - Grizzly G4003G Owner's Manual

Threading

The following subsections will describe how to
use the threading controls and charts to set up the
lathe for a threading operation. If you are unfamil-
iar with the process of cutting threads on a lathe,
we strongly recommend that you read books,
review industry trade magazines, or get formal
training before attempting any threading projects.
Headstock Threading Controls
The threading charts on the headstock face dis-
play the settings for inch and metric threading.
Using the controls on the lathe, follow the exam-
ple below to understand how to set up the lathe
for the desired threading operation.
To set up for a thread pitch of 13 TPI:
1.
DISCONNECT MACHINE FROM POWER!
2.
Install end gears as directed on inch thread
chart (see Figure 70 or the chart on gear-
box).
End Gear Configuration
40T
86T
40T
Figure 70. End gear and gearbox lever
configuration for 13 TPI.
-52-
3. Position gearbox lever pins in gearbox holes
indicated on chart—B and 7.
— Pull knurled knob out which releases lever
pin from hole.
— Lower lever below gearbox and slide it
directly under desired hole.
— While pulling knurled knob out, raise lever
so that pin is directly over hole, then
release knob to seat pin.
4.
Move headstock feed selection to left for
leadscrew rotation.
Apron Threading Controls
The half nut lever engages the carriage with the
leadscrew, which moves the carriage and cutting
tool along the length of the workpiece for thread-
ing operations (see Figure 71).
IMPORTANT: Make sure the feed selection lever
is in the disengaged (center) position before
attempting to engage the half nut.
Feed Selection
Lever
Cross Slide
Disengaged
Carriage
Feed Selection
Lever
Figure 71. Apron threading controls.
Model G4003G (Mfd. Since 1/15)
Half Nut
Lever
Disengaged
Halfnut
Lever
Engaged