Controls - Jet GHD-20 Operator's Manual

4. Raise the rack assembly by turning the table
raising handle clockwise.
5. The rack assembly is at its full height when the
top rack ring is just below the head assembly
(as illustrated in Fig. 6).
6. Tighten the hex socket cap screw on the top
rack ring and two set screws on the lower rack
ring.
Controls
Low / Off / High Switch
(A, Fig. 8) - located top left
side of the head assembly. Switch between low and
high speed range. In the stop position, the spindle
is stopped, but the machine still has power.
Fine Feed Handwheel (B, Fig.8) - located on the
front lower right of the head assembly. Turn
clockwise to lower the quill. Turn counter-clockwise
to raise the quill.
Quill Lock
(C, Fig. 8) -located on the front lower
right of th~ head assembly. Turn clockwise and
tighten to lock the quill.
Turn
counter-clockwise and
loosen to unlock the quill.
Speed Selectors (0, Fig. 8}-located on the top
front of the head assembly. Used with low/offlhigh
switch and the speed chart on the front of the head
assembly to set the drill to a specific speed.
Caution: Change speeds only when the machine
is stopped.
Depth Stop (GHD-20/20T)(E, Fig. 8) -
located on
the front bottom of the head assembly. When set,
the quill will only advance to a certain depth.
Depth Stop (GHD-20PF/20PFT) (A, Fig. 9) -
located on the downfeed assembly on the right side
of the head assembly. When set, the quill will
advance automatically or manually to a certain
depth.
Power Downfeed Speed Selector
(GHD-20PF/20PFT) (B, Fig. 9) -located on the right
side of the head assembly. Set to advance the quill
at desired speed. Engage the power downfeed by
pulling the handle assembly away from the head.
Disengage the power downfeed by pushing the
handle assembly toward the head. Tighten
Lock
Screw (C, Fig. 9) to lock out the power downfeed
and to keep the drill in manual feed only.
Fig. 7
c
Fig. 8
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t
'J
e"
Fig.9
7