-22-
End Gear Setup
The gearbox drive gear on this lathe can be
con
fi
gured for the normal position or the alternate
position, depending upon the type of operation to be
performed. The lathe is shipped with the end gears
in the normal position. Gears must be thoroughly
cleaned and re-coated in grease before installing,
and the backlash must be maintained at 0.127mm
(0.005") for correct meshing.
Normal Position ( Inch)
The 24T end gear is installed in the top position, the
44T/56T end gears in the middle position, and the
57T end gear in the bottom position, as shown in
Figure 88. In the normal position, the 56T and 57T
gears are meshed, which allows for inch threading
and all general feed operations.
Normal Position ( Metric )
The 28T end gear is installed in the top position, the
55T/54T end gears in the middle position, and the
64T/22T end gear in the bottom position, as shown
in Figure 88. In the normal position, the 55T and 64T
gears are meshed, which allows for metric threading
and all general feed operations.
Alternate Position ( Inch )
When the 44- and 57-tooth end gears are meshed,
you can perform modular and diametral pitch turning.
Con
fi
guring the End Gears
1. Disconnect Lathe from POWER !
2. Move the gearbox range lever to "Low" so that
the gears will not rotate in the following steps,
then open the lathe headstock side cover.
3. To change the position of the 57T gear :
a. Remove the cap screw and
fl
at washer that
secures the gear, then remove the gear.
b. Clean away debris and grime from the gear
and apply a light coat of machine oil.
c. Swap the position of the gear, then align it
with the key and insert it on the gear shaft.
d. Re-install
the
fl
at washer and cap screw.
4. Close and secure the headstock side cover.
Figure 53. Normal end gear position.
28T
55T
54T
64T
22T
Alternate Position ( Metric )
When the 28- and 22-tooth end gears are exchanged,
you can perform modular and diametral pitch turning.
Con
fi
guring the End Gears
1. Disconnect Lathe from POWER !
2. Move the gearbox range lever to "Low" so that
the gears will not rotate in the following steps,
then open the lathe headstock side cover.
3. To change the position of the 22T/28T gear :
a. Remove the cap screw and
fl
at washer that
secures the gear, then remove the gear.
b. Clean away debris and grime from the gear
and apply a light coat of machine oil.
c. Swap the position of the gear, then align it
with the key and insert it on the gear shaft.
d. Re-install
the
fl
at washer and cap screw.
4. Close and secure the headstock side cover.
Threading Controls
If you are unfamiliar with threading procedures on a
lathe, we strongly recommend that you read books,
review industry trade magazines, or get formal
training before beginning any threading projects.
Power Feed Lever
The feed control lever must be in the neutral (
horizontal ) position for threading operations or the
half nut will not engage with the leadscrew ( see
Figures 54–55 ).
24T
56T
57T
44T
Figure 52. Normal end gear position.
