Grizzly G0554 - Manual (Page 40)

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G0554 Gear-Head Floor Lathe
Thread Settings
The Model G0554 lathe is capable of cutting inch
and metric threads. Most inch threads can be
cut without changing gears. Metric threads and
a few inch threads require that you change the
gears. This will be explained in the next sub-sec-
tion. Below are instructions for setting levers and
changing gears for threading.
To determine thread settings:
1. Determine the threads per inch (TPI) for inch
threads or pitch for metric threads.
2. Examine the appropriate thread chart. For
inch threads and metric threads (see Figure
55) or examine chart on the front of the head-
stock (see
Figure 56).
Figure 56. Headstock thread chart.
3. Find the corresponding thread info from the
chart and work to the left and up to determine
the correct lever settings.
Example: To cut 20 TPI thread, the handle
combination would be "B, C and 3".
4. Move the feed rod lock knob to the open posi-
tion (see Figure 53).
5. Move the selectors to the appropriate letter/
number setting by rotating the handle left or
right.
6. Move the feed direction selector to the desired
direction for movement (see Figure 51).
7. Move the feed rod lock knob to the locked
position.
Note: The spindle must be OFF to make
changes that affect the gear box. You may
also need to rotate the spindle by hand or
move the apron right/left to get gears to
engage properly.
Changing Gears for
Feed/Threads
The Model G0554 lathe comes with the 25T,
127T, & 50T gears installed. This set of gears will
cover most feeds and inch threads. The 30T, 32T,
and two 40T gears are provided so that additional
feeds and inch/metric threads may be cut.
To change the gears:
1. UNPLUG THE LATHE!
2. Open the end cover door to expose the head-
stock gears.
3. Loosen the hex nut on the pivot just below
the large gear in Figure 57, Item A.
NOTICE
Some threading operations may damage
the lead screw if performed at high speeds.
Always use the slowest speed possible for
your particular operation!