16
8 MAINTENANCE/SERVICE
WARNING
●
Always disconnect the power and turn off the
switch before attempting any maintenance.
Failure to disconnect the power and turn off the
switch during set up, inspection or maintenance
can cause accidents and severe injuries.
●
Check to see periodically that mounting screws
are tight. If you find them loose, retighten.
8-1. Tighten Set Screw When Machine is Not Used
For the purpose of safety, when you don’t use the
machine temporally or on a long-term basis, raise
the Drill Motor and set it in position with the Set
Screw so that it will not come down on its own
weight. If you leave the machine alone with the
Drill Motor in a lowered position, the Pilot Pin and/
or cutter may be damaged when the machine is
relocated. (Fig.31)
8-2. Grease the Sliding Surfaces from Time to Time
Grease the machine body and Slide Board from time
to time. (Fig.31)
8-3. Slide Board Clearance Adjustment
Excessive clearance between the machine body
and Slide Board would deteriorate not only drilling
performance but also cutting tool life to a substantial
degree. If you find excessive clearance, make
adjustment by tightening 5 slide board adjusting
screws on the side of the machine using the same
torque all round so that the Drill Motor will not come
down on its own weight. (Fig.31)
8-4. Bracket Inspection and Oiling
Among other things, drilling accuracy hinges on the
Bracket that supports the Arbor Body. See that the
(three Hexagon Socket) Bracket mounting bolts are
tight, from time to time. (Fig.31)
Fig. 31
8-5. Keep the Tip of Pilot Pin Sharp
When the tip of Pilot Pin gets dull, it sometimes fails
to seat into punched hole, causing drilling accuracy
to deteriorate. See that the tip is sharp from time to
time.
If you find it too dull, regrind or replace as required.
When regrinding do so carefully, for grinding with too
much force may cause the tip to get dull or soften
the material to such a degree that it is no longer
usable. (Fig.32)
Pilot Pin
Sharpen
the tip
Optimal angle 70˚
Fig. 32
8-6. Recovery Measures When Pilot Pin Gets
Jammed
When you change cutting tool you also change
Pilot Pin, which acts as a guide for the cutting tool.
However there are times when the pin does not
come off easy with cutting chips in the clearance
between the cutting tool and pin, causing jamming.
In such case, tap the tip of Pilot Pin with a wooden
hammer, etc., and pull it off. (Fig.33)
Summary of Contents for AO-5575
Page 9: ...8 3 PART NAMES Fig 8 ...
