Grizzly G4002 Owner's Manual page 30

Metric thread selection:
the chart in figure 23 lists 29 metric threads that
can be cut on the g4002/3. Five ranges are used
on the left hand quick change selector and 6 on
the right hand quick change selector. Additionally,
5 gear changes are necessary to accomplish
all of the available metric threads. these gear
changes take place on the left hand end of the
machine. see figure 24.
the chart is divided into 3 main sections or
columns. starting from the left: gear diagram,
Combination of gears and m/m per pitch.
To use the chart:
1.
Find the desired pitch in the chart.
2.
Below the m/m per pitch label are numbers.
Find the corresponding number above the
desired pitch and change the right hand quick
change lever to that position.
figure 23. Metric thread chart
-28-
3. to the left of the desired pitch is a small col-
umn with a letter. this letter indicates place-
ment of the left hand quick change lever.
Move the lever to the corresponding loca-
tion.
4.
in the "Combination of gears" column are
3 small columns. please note the "F" and
"g" at the top. the numbers below F and g
represent the number of gear teeth of a gear
included with the lathe. Find the gears that
have the corresponding number of teeth as
stated in the chart to the left of the desired
pitch.
Example:
the desired metric pitch is 1.25 mm. Find this
number in the chart and find the number of teeth
of the two gears to the left. the F gear will need
to have 47 teeth and the g will need 60 teeth.
A diagram on the left side of the chart on the
machine tells us the 47 tooth gear goes on top of
the middle gear and the 60 tooth gear goes on
the bottom.
figure 24. Change gear bracket and gears.
Model G4002/G4003 (Mfg. Since 8/12)