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This lathe can cut inch and metric threads. It is equipped
with a thread dial that lets you know where to re-engage
the half nut when cutting most inch threads. The thread
dial makes sure the cutting tool falls back into the same
groove that has been just cut.
To setup for threading, do these steps:
1.
DISCONNECT THE LATHE FROM POWER!
2.
Install the appropriate change gears to achieve the
thread pitch needed. For example, the chart below
shows that to get 40 threads per inch, you must
move the gearbox lever to position "
+
(
Figure
37
),
and install the gears stamped "
*'
and "
-'
" in the
"
X
and "
Y
positions shown in
Figure
38
.
Note:
B\\gk_\^\XiYXZbcXj_jc`^_kcpcffj\
at
0.003" to 0.008".
3.
Set your cutting depth to a few thousandths of an
inch, engage the half nut lever, and engage the
threading dial (
Figure
39
).
4.
Turn the lathe on, let it thread, and turn the lathe
off before the tool or apron crashes. Finish the
threading pass by manual rotation of the chuck, and
then disengage the half nut lever.
5.
Return the apron, position the tool to make second
the pass, and engage the half nut where the dial
indicated by the thread dial chart on the apron.
=FID<KI@:K?I<8;@E>
, keep the half nut engaged
during the entire threading process. When the tool
reaches the end of the first threading pass, turn the
motor
F==
and back the tool out of the thread. Reverse
the motor direction to move the cutting tool back to
the thread beginning. Repeat these steps and DO NOT
disengage the half nut until you have completed your
thread.
Threading Setup
Thread Dial
V
&',
W
)%
-%
)%
&'%
V
&'%
W
)%
-%
)%
&',
AZkZg
V
W
c
&
bb
%#,*
&#'*
&#,*
&
'
(
)
*
+
,
-
.
+% (%
-
.
.#* &% && &&#* &' &( &)
(% (% &+ &- &. '% '' '( ') '+ '-
(% +% (' (+ (- )% )) )+ )- *' *+
AZkZg
V
W
,
&
&
)
,
&
&
&
,
&
&
(% '- (% (% (% (% (% )' +% +% +%
+% +% +% )* (% (+ (% (+ (% (+ (%
%#* %#,
%#- &
&#*
' '#* (
=`^li\
37
%
Gearbox selector in position
+
.
=`^li\
39
%
Thread dial and half nut lever.
=`^li\
38
%
Change gear locations.
V
W
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