Jet JDP20EVST-460-PDF, Operating Instructions And Parts Manual

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Speed range handle (I): Selects high or low speed
range. See sect. 4.0 for ranges. Stop spindle before
moving handle.
Spindle must be stopped
before attempting to adjust speed range
handle. Failure to comply may damage speed
adjustment mechanism.
Downfeed handle (J): Lowers quill/spindle.
Engages powerfeed or manual fine feed when
moved away from head. Can be pushed toward
head to disengage power feed at any time.
Downfeed lock knob (K): Tighten to lock out
powerfeed and keep drill in manual feed mode only.
Powerfeed scale (L): Graduated in 1/16 inch.
Setting locked by screw (L
1
).
Depth stop (M): Can be set for depths up to 6
inches (15.24 cm). Handle locks setting.
Fine feed handwheel (N): Manually feed spindle in
fine increments. Clockwise to lower. Scale is
graduated in 0.05 mm.
Feed rate lever (O):
NOTE: The Electronic Variable Speed unit is
designed to shut down to prevent harm to the
system, in the event of overloading the spindle.
Make sure speed control knob (G) and speed range
handle (I) are in matching ranges for the work being
done. Drilling large holes requires speed range
handle to be in ‘Low’ mode and speed control knob
set to a speed high enough to power the large bit.
9.0 Operation
Refer to Figures 8-1 and 8-2.
9.1 Operating precautions
The following operating and safety precautions must
be observed in order to avoid harm to operator or
damage to drill press.
1. Head assembly must be locked to column so
the thrust produced by drilling will not force the
head assembly up the column.
2. Work table must be locked to column so it will
not be forced down the column.
3. Belts should be properly tensioned.
4. Do NOT start to drill workpiece until making
certain workpiece is held down securely.
5. Point of operation protection is required for
maximum safety. This remains the
responsibility of the user/purchaser since
conditions differ between jobs.
6. Make sure tool is secured in the spindle or
chuck before attempting to use the drill press.
7. Make sure spindle taper is clean and free of
burrs, scoring, and galling to assure maximum
gripping.
9.2 Manual drilling
1. Set switch (H) to drill mode.
2. Loosen handle (L
1
) on powerfeed hub to allow
full rotation of downfeed handle.
3. Use downfeed handle to set end of drill against
surface of workpiece.
4. Loosen handle (M, Figure 8-2) and slide
indicator block to zero. Then move indicator
block to match drilling depth on scale, and
tighten handle.
5. Start motor and drill hole until travel is
restrained by indicator block.
9.3 Manual tapping
1. Set switch (H) to tapping mode. Limit switches
are now active.
2. Set feed rate lever (O, Figure 8-3) to zero.
(NOTE: Feed rate lever must be set to zero or
spindle will not turn in manual tap mode.)
3. Set depth stop in same manner as above.
4. When quill is advanced, upper limit switch will
be released for tapping. When lower limit switch
is triggered, spindle will retract and reverse
rotation for tap withdrawal. When upper limit
switch is again reached, spindle will revert back
to forward rotation.
NOTE: When tapping switch is off, limit switches are
deactivated and do not affect spindle rotation.
9.4 Manual fine feed
1. Set switch (H) to drill mode.
2. Set depth of cut on powerfeed scale (L) and lock
setting (L
1
).
3. Turn on spindle (B).
4. Pull downfeed handle (J) away from head.
5. Push knob (N
1
) into handwheel until it engages,
and rotate handwheel (N). When set depth is
reached, downfeed handle will disengage and
spindle will retract.
9.5 Powerfeed drilling
NOTE: Feed rate lever (O, Figure 8-2) will only
function in drill mode; powerfeed cannot be used in
tapping mode.
1. Set switch (H) to drill mode.
2. Set depth stop (M).
3. Turn on spindle (B).
4. Move feed rate lever (O) to desired setting.