Porter-Cable 17-990X - Manual (Page 12)

12
PERMANENT MOUNTING
If your drill press is to be used in a permanent location, the drill press base must be secured to the supporting surface
with fasteners through the two mounting holes, (A) Fig. 20, in the drill press base.
MOUNTING DRILL PRESS
TO A PLYWOOD BASE
If you do not fasten your drill press in a permanent
manner, the drill press must be fastened to a plywood
mounting board to prevent the drill press from tipping
over during normal use. NOTE: Use a good grade of
plywood with a minimum 3/4" thickness. Do not
make the mounting board from particle board since
particle board breaks easily.
1. Drill two 3/8" diameter holes 12¼" (B) Fig. 21, apart
from center, corresponding to the mounting holes (A)
Fig. 20, of the drill press base in a 21" by 28" minimum
size plywood board.
2. Fasten the drill press base to the mounting board
using the carriage bolts, flat washers, lockwashers, and
hex nuts (C) Fig. 21, furnished with your drill press. The
holes for the carriage bolt heads must be countersunk
so that the bolt heads are flush or below the bottom
surface of the mounting board in order to guarantee
proper stability.
3. When the drill press is mounted to the supporting
board, the board must extend a minimum of 3" beyond
each edge of the drill press base, as shown in Fig. 22.
4. The plywood base must be secured to the floor or
supporting surface if there is any tendency of the drill
press to vibrate, slide or walk during normal operation.
Fig. 21
B
C
21" MINIMUM
28" MINIMUM
Fig. 22
3" MINIMUM
3" MINIMUM
Fig. 20
A
12¼"
3" MINIMUM
3" MINIMUM
FASTENING DRILL PRESS BASE TO A
SUPPORTING SURFACE