Luna 21149-0107, Manual

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Figure 19. imperial chart
Threads and Change gears
This lathe(metric) has 14 kinds metric screw and 7
kinds imperial screw ,together This lathe(imperial)
has 15+6 (+6 needs change gears) =21 kinds imperia
screw and 6 +6 (+6 needs change gears)=12 kinds
metric screw ,together . To machine these thread
,just adjust the gear box levers ,then you can save the
trouble of changing the gears. Z30 gear has been in-
stalled in the machine when you receive the machine,
the change gear is Z30/Z91/Z90, see Figure 20. We
prepared three gear Z35 ,Z50, Z60 for imperial lathe
,to enable the imperial lathe with more metric thread
.You must change the change gear to states as Figure
19, and you can get extra 6 kinds metric screw and 5
kinds imperia screw as Form 1 by changing between
Z30 Z35 Z50 Z60 based on thread pitch . Please use
Fwd and Rev when cutting thread. We advise you to
adjust the speed to 125r/min when you make thread
,and the screw relief groove must be three times than
screw pitch at least. If the screw pitch is less than
1.5mm ,the groove must be not less than 4mm.After
you can operate the machine skillfully ,you can adjust
the speed or the groove, so your safety can be guaran-
teed.
Figure 20. Change Gears
Left threads and reverse cutting feed
Gear A has been used in the machine when you recei-
ve the machine, It can meet the General processing.
When you cut the left threads or need reverse cutting
feed, must use the Gear B. Loosen the Screw 1 and
adjust the Gear B to good running .
Gear A Gear B Screw 3
Screw 1
G=30
Z86
Z91
Z90
Screw 2
Fwd Rev