Jet GHB-1236, Operation And Maintenance Instructions

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2. Turn knob (B, Figure 10-4) counterclockwise
so the arrow is pointing up to start the feed rod
rotating.
Figure 10-4
10.5 Powered carriage travel
Push lever (C, Figure 10-3) down to engage cross
feed. Pull lever up to engage longitudinal feed.
10.6 Thread cutting
1. Set feed rate selectors (D/E/F, Figure 10-4) in
proper position for correct feed rate of the
thread pitch to be cut.
2. Turn knob (B, Figure 10-4) clockwise so the
arrow is pointing up to start the thread cutting.
3. Engage half nut lever (G, Figure 10-3).
4. The half nut lever and the threading dial are
used to thread in the conventional manner.
The thread dial chart specifies at which point a
thread can be entered using the threading dial.
5. To cut metric threads, the half nuts must be
left continually engaged once the start point
has been selected and the half nut is initially
engaged (thread dial cannot be used).
11.0 Adjustments
11.1 Saddle adjustment
1. Loosen four hex nuts (A, Figure 11-1) found on
the bottom rear of cross slide.
2. Turn each of four set screws (B, Figure 11-1)
equally with a hex wrench until a slight
resistance is felt. Do not overtighten.
3. Move carriage with handwheel and determine
if drag is to your preference. Readjust
setscrews as necessary to achieve desired
drag.
4. Hold socket set screw firmly with a hex wrench
and tighten hex nut to lock in place.
5. Move the carriage again and adjust if
necessary. Note: Over-adjustment will cause
excessive, premature wear of gibs.
Figure 11-1
11.2 Cross slide adjustment
If the cross slide is too loose, follow procedure
below to tighten:
1. Loosen the rear gib screw (C, Fig. 20)
approximately one turn.
2. Tighten front gib screw a quarter turn. Turn the
cross slide handwheel to see if the cross slide
is still loose. If it is still loose, tighten the front
screw a bit more and try again.
3. When cross slide is properly adjusted, snug
rear gib screw. Do not overtighten; this will
cause premature wear on the gib and mating
parts.
11.3 Compound slide adjustment
Follow same procedure as for cross slide
adjustment, to adjust the compound rest.
11.4 Tailstock adjustment
If the handle will not lock the tailstock securely, use
the following procedure:
1. Lower handle to unlocked position.
2. Slide tailstock to an area that will allow you to
reach under the tailstock.
3. Tighten tailstock clamping nut 1/4 turn, and re-
test for proper locking. Repeat as necessary.