Jet GH-2040ZH Mode D'emploi page 18

-Install the headstock cover.
-Test the clutch function (readjust if necessary).
Break:
After the clutch is disengaged, the main drive can be
stopped by the brake.
If the spindle can not be stopped in a short period, the
braking strap should be adjusted (See Fig 17).
Main Spindle and Bearings:
If the spindle precision can not meet the requirement,
first loosen nut 1
Loosen locking clip and loosen nut 2.
Adjust the play of the front and middle bearings through
nuts 3 and 4. After the adjustment tighten the loosened
nuts.
Fig 16
Fig 17
After the adjustment make an idle running at the
highest speed for two hours. The temperature must
remain below 70°C.
Feedbox:
The design allows to cut most threads without the
need for change gears.
Lead Screw:
The axial play of the lead screw can be eliminated by
adjusting the nuts (1, Fig 19)
Apron:
Power feed drive route is from feed rod to apron,
through safety clutch to worm, through gear drives to
longitudinal or cross movement.
To realize rapid feed at any time, an overstep clutch
is equipped on the worm axle.
When the rapid feed motor drives the worm axle, it
oversteps the feed rod in one direction.
When the rapid feed is stopped, the normal feed is
automatically engaged again.
17
Fig 18
Fig 19