Operation; Precautions; Operating Controls; Manual Operation - Jet JDPE-20EVS-PDF Operating Instructions And Parts Manual

8.0 Operation

8.1 Precautions

The following precautions must be observed in
order to avoid harm to operator or damage to drill
press or tool. In addition, read and understand all
safety warnings in sect. 1.0.
1. Work table must be locked to column so it will
not be forced down the column by the thrust of
the drilling process.
2. Be sure belt is tensioned.
3. Do NOT start to drill workpiece until making
certain workpiece is secured on table.
4. Point of operation protection is required for
maximum safety. This remains responsibility of
the user since conditions differ between jobs.
5. Make sure the tool is secured in spindle or
chuck before attempting to use the drill press.
6. Make sure spindle taper is clean and free of
burrs, scoring, and galling to assure maximum
gripping.
7. When drilling through-holes, use a block of
wood or metal below the workpiece to prevent
drilling into table.
8. Apply sufficient cutting fluid to point of tool
contact, using a spray bottle or other flow
system (not provided).

8.2 Operating controls

Refer to Figures 8-1 and 8-2.
Depth stop and scale. Turn scale ring (A
desired depth aligns with indicator. Tighten lock
handle (A ). If not using depth stop, loosen lock
2
handle (A ).
2
Downfeed handles (B).
Manual model: Counterclockwise movement ad-
vances quill toward table. When released, return
spring retracts quill. CAUTION: Handle will spring
back if released, and rotate during retraction.
Powerfeed: Pulling downfeed handles outward
(away from head) engages powerfeed.
Speed Range Lever (C). Clutch model only. Move
lever to change speed. (Absent from step pulley
model, where speed range is set by changing
pulley position.)
Downfeed dial (D). Select among three feed rates.
Set dial to "0" when not using powerfeed.
Powerfeed locking knob (E). Tighten to prevent
powerfeed engagement. Loosen to allow downfeed
handles (B) to be pushed outward into powerfeed
mode.
Digital
(revolutions per minute).
Spindle rotation switch (G). Selects spindle
rotation direction. Use reverse to retract a tap or for
left-hand thread tapping.
Spindle speed control (H). Sets spindle rotation
speed within the pre-selected range.
Spindle start/stop (J). Activates spindle rotation.
Emergency stop (K). Push to stop all machine
functions. To restart, rotate E-stop button clockwise
until it disengages. Note: It is recommended that
start/stop button (N) be used for normal spindle
stoppage to prevent unnecessary wear on E-stop.
Work lamp (L). Uses separate power cord. Turn
on/off using switch atop lamp.
Figure 8-1: head right side (JDPE-20EVSC-PDF)
) until
1
Figure 8-2: head left side (JDPE-20EVSC-PDF)

8.3 Manual operation

1. Tighten powerfeed locking knob (E, Figure 8-
1) to prevent powerfeed activation.
2. Use feed handles (B, Figure 8-1) to bring tool
down into workpiece.

8.4 Depth stop

The depth stop is used for repetitive drilling of
holes of identical depth in manual mode, or to set
the drill depth and engage bit retraction in
powerfeed mode.
1. Turn OFF drill press.
2. Mark desired depth of cut on workpiece as
reference.
11
readout (F). Shows spindle RPM