Metric Threads - Shop fox M1099 Owner's Manual

Model M1099 (Mfg Since 8/07)

Metric Threads

Use these steps to learn how to setup your lathe for
metric threading. The example in Figure 35 shows lathe
setup for cutting a metric thread pitch of 0.45mm.
To setup for metric threading, do these steps:
1. DISCONNECT THE LATHE FROM POWER!
2. Turn the feed dials to the numeral and letter indi-
cated by the chart in Figure 35.
Note: You may have to rock the chuck by hand
slightly to get the gearbox gears to engage one
another.
3. Using the chart in Figure 34, gather the required
change gears.
4. Open the side cover and use a 6mm hex wrench to
loosen the lash adjuster (Figure 32) and swing the
change gear assembly out of the way.
5. Remove the spindle E-clips and cap screw, lubricate,
and swap out the change gears in the order shown
on the chart in Figure 32.
Note: All change gears are stamped with the num-
ber of teeth they have.
a
b
Figure 35. Metric threading setup.
-31-
6. Move the lash adjuster so the gear
backlash is between 0.003" to 0.008",
tighten the lash adjuster cap screw,
and close the side cover.
7. Using a 5mm hex wrench, make sure
the carriage lock is loose (Figure 31).
8. The lathe is now setup for threading.
During threading keep your hand on
the half-nut lever ready to disengage
the half nut to avoid potential carriage/
chuck crash.
Note: Since this lathe has an inch lead
screw, do not use the thread dial when cut-
ting metric threads. Instead you must leave
the half nut engaged until the threading
operation is totally complete.
Metric Thread Chart
= 0.45mm