HEADSTOCK (Figure 1)
central position, thus relieving the load on the feed rod
The Model B-40 Lathe is a single pulley drive, however,
before making the shift as outlined above.
a positive clutch can be added to transmit power from
drive pulley through the headstock gears to the main
For the first two weeks or until such time as your lathe is
spindle. This clutch is compactly located in a clutch
well run in, we suggest that you disengage the tumbler
housing on the end of the machine and its operating
gear lever item 33, when shifting the ratio gear lever item
lever is conveniently located on the front of the machine
31 to either the letter D or E positions. When cutting
easily accessible to the operator. The Model B40
threads of two or three pitch, run your lathe very slowly
headstock is arranged for twelve speed changes,
and carefully for the first five or six months. A reverse
controlled by three levers 36, 37 and 38 (see Fig. 1)
lever item 5, on the front of the headstock provides
arranged at side of the headstock housing. Lever 36 is
means for obtaining right or left hand threads.
the high speed gear shift lever, 37 is the intermediate
gear shift lever and 38 is the high to low gear shift lever.
APRON (Figure 1)
Do not attempt to shift any of these levers while the
The apron is provided with a positive interlocking device
motor is running. Failure to observe this point may result
which prevents the simultaneous engagement of the
in damage to gears or clutch. If the gears or clutch do
feed rod and lead screw. When the apron reverse lever,
not readily engage simply jog the motor by pushing the
item 43 , is in either the extreme upper or lower position
switch to the on and off positions at the same time
the feed gears are engaged and the lead screw half nuts
maintaining a steady even pressure on the levers in the
are locked out. To engage the half nuts on the lead
desired direction. Do not clash gears when shifting. The
screw the reverse lever, item 43, must be placed in its
positions of these levers for the various speed changes
central or neutral position, thus disengaging the feed
are clearly indicated on the spindle speed chart, (item 7,
gears and unlocking the half nuts which are opened and
closed by shifting the control lever 45. When the lead
screw is in use be sure to release the feed clutches on
QUICK CHANGE GEAR BOX (Figure 1)
both the longitudinal and cross feed. On the Model B
Lathe the feed clutches are controlled by turning
Forty-nine (49) changes of feeds and threads are
the conventional snap lever. To release the clutches
provided In the conventional type quick change gear box.
turn the knobs to the left, to engage them turn to the
right. The snap lever, item 42, controls the longitudinal
The positions of the tumbler and ratio levers are clearly
feed while nap lever, item 4L, controls the cross feed.
indicated on the index plate mounted on top of the box.
When changing threads or feeds, the apron power feeds
TAPER ATTACHMENT (Figure 1)
should be disengaged. This will make the gear box
Taper attachment furnished is of the precision telescopic
easier to operate. When changing to coarse feeds or
type which is bolted to the back end of carriage. The end
threads the motor should be stopped and the changes
of taper attachment is graduated in degrees and inches
made while the lathe is coasting to a stop, or the motor
per foot. To use this attachment it is only necessary to
can be jogged by pushing the switch quickly to the on
adjust this taper attachment to the angle or inches per
and off positions.
foot required. Then by locking clamp on bed, your
machine is ready for turning your tapers. Use your cross
By means of a simple sliding gear and tooth. clutch
slide for regulating your different amounts of cuts on your
arrangement , the feed rod and lead screw cannot be
compound rest. It is always best, in taking an extra cut,
engaged or operated simultaneously. When the shift
to go by your work at least 1" to 1i" to avoid any back
lever , item 35, is in the left hand position the feed rod is
lash that might be caused due to wear over a period of
in action and the lead screw is idle. By shifting this lever
years.
to the right hand position, the lead screw is engaged and
the feed rod will be idle. With the lathe running on one of
the slow speeds ,this lever can be easily shifted by
exerting a firm even pressure in the direction desired.
Do not shift this lever when the lathe is running on the
high or fast spindle speeds. It is also advisable to set the
reverse lever item 43,on the front of the apron to the
neutral
or
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