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For Machines Mfg. Since 3/11
Turn-Nado
®
Gearhead Lathes
OPERATION
Note: In the next step, use the chuck key to rock
the spindle back and forth to help mesh the
gears as you make adjustments.
3. For a metric thread pitch of 2.5mm, use the
configuration string of characters to the
right of the selected thread pitch (LCR3Z) to
position the threading controls as follows:
L Move the gearbox range lever to the low
position.
C Point the left gearbox lever to the C.
R Point the middle gearbox lever to the R.
3 Position the bottom gearbox lever in the
3 slot.
Z Point the right gearbox lever to Z.
The lathe is now setup to cut a 2.5mm thread
pitch.
Apron Controls
The half nut lever engages the apron with
the leadscrew which moves the carriage and
cutting tool along the length of the workpiece for
threading operations (see Figures 78–79).
Important: Make sure the feed control lever
is in the disengaged (middle) position before
attempting to engage the half nut.
Engaged
Disengaged
Engaged
Disengaged
Half Nut Lever
and Half Nut
Feed ON/OFF
Lever
Figure 79. Feed ON/OFF lever and half nut positions
for threading.
Attempting to engage the half nut while the
cross slide or carriage is engaged with the
feed rod could cause severe damage to the
lathe. Never attempt to engage the half nut
while the feed control lever is engaged.
Figure 78. Carriage controls.
Feed ON/OFF
Lever
Half Nut
Lever