Service manual

5
Major Tool Components
Template Boss
(See Chart)
Accessory Air
Port (1/8-27 NPT)
Adjustable Tail
Pad
Variable Spacing
Pressure Foot
Bypass Cover
Feed Rate
Adjustment
Backhead
Spindle
Adjustment
Clamp
Air Inlet Bushing
(3/8-18 FNPT)
Motor
Exhaust
Feed Sleeve
Spindle
Adjustment
Dwell
Adjustment
Depth Control
Cover
Trigger
Trigger Lock
Tool Adjustments
WARNING: Disconnect air-supply before servicing. Clamp
mechanism moves when connecting or removing air supply.
Keep hands and fingers away from clamping and feed
mechanism.
Spindle Stroke Adjustment
Loosen spindle adjustment lock, then turn spindle adjust-
ment. Right hand rotation advances cutter forward; left hand
rotation returns cutter. Correct cutter point position is flush
with face of template boss. When cutter is properly adjusted,
lightly tighten spindle adjustment clamp to hold adjustment.
Micrometer Depth Adjustment
Loosen depth adjustment set screws and rotate depth
adjustment nut. Clockwise rotation decreases depth; coun-
terclockwise increases depth. Graduations scribed on barrel
are in .001" increments. When proper depth is achieved,
lightly tighten set screws.
Feed Rate Adjustment
With appropriate tool, turning feed rate adjustment counter-
clockwise, increases feed rate. Turning the screw clockwise
decreases feed rate. Feed rate can be measured by using
the following formula:
60 seconds
Time = Feed Rate x Spindle Speed (rpm)
Dwell Adjustment
Insert appropriate size hex wrench into dwell adjustment
valve opening. Rotate wrench clockwise until valve seats
lightly. Rotate valve counterclockwise 1/4 turn to obtain base
setting.
Note: If adjustment valve is opened too far, drill motor will not
cycle, and feed cycle cannot be obtained. To correct, turn
valve clockwise to seat valve and set according to instruc-
tions above.
If valve is closed too far, retract cycle cannot be obtained. To
correct, turn valve counterclockwise and set according to
instructions.
Closing valve increases countersink dwell time; opening
valve decreases countersink dwell time.
Tail Pad Adjustment
The purpose of the tail pad is to compensate for slight
surface curvature of the workpiece being drilled and to
assure that the hole being drilled is perpendicular to the
surface.
To adjust to a flat plane for drilling flat surfaces, use a straight
edge between the tail pad and face of template boss and
adjust the tail pad until the straight edge is flush with the
face of the template boss.
An optional tail pad is available for high curvature sur faces.
(See Accessories for additional information.)