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G7947/G7948 12 Speed Floor Drill Press
-21-
6. Suspend a plum bob from the center of the
headstock spindle so it is over the tape/ruler
as shown in
Figure 13.
7. Center the headstock directly over the base
as indicated by the plum bob and ruler.
Figure 13. Aligning headstock with base.
8. Tighten the two headstock setscrews to the
column, as shown in
Figure 14.
Figure 14. Securing headstock to column.
The drill chuck attaches to the spindle by means of
the arbor, shown in Figure 15. Matched tapers on
the arbor and the inside of the chuck create a semi-
permanent assembly when properly joined.
Figure 15. Chuck components.
Drill Chuck
Chuck Key
Arbor
Drift Key
Drill Chuck & Arbor
To assemble the drill chuck and mount it to
the spindle:
1. Use mineral spirits to thoroughly clean the drill
chuck, arbor, and spindle sockets and dry all
surfaces before assembly. Follow all safety
warnings on the container of the mineral
spirits. Failure to clean the mating surfaces
may cause the tapered fit to loosen during
operation, resulting in separation and an
unsafe condition
.
2. Use the chuck key to adjust the jaws of the
drill chuck until they are inside the drill chuck
body.
3. Place the drill chuck face down on a
workbench. The arbor has a short taper and
a long taper. Place the short taper into the
socket in the back of the drill chuck and tap it
with a rubber or wooden mallet, as shown in
Figure 16. If the chuck fails to remain secure
on the arbor, repeat Steps 1
& 2.