Delta 17-900 - Manual (Page 13)

13
Fig. 27
Fig. 28
ADJUSTING SPINDLE
RETURN SPRING
The spindle is automatically returned to its upper most
position upon release of the handle. It is recommended
that the handle be allowed to slowly return to the top
position after all holes have been drilled in the material.
This spring has been properly adjusted at the factory
and should not be disturbed unless absolutely
necessary. To adjust the return spring, proceed as
follows:
1. Disconnect the tool from the power source.
2. Loosen the two nuts (B) Fig. 27, approximately 1/4”.
Do not remove nuts (B) from shaft (C).
3. While firmly holding spring housing (A) Fig. 28, pull
out housing and rotate it until the boss (D) is engaged
with the next notch on the housing. Turn the housing
counter-clockwise to increase and clockwise to de-
crease spring tension. Then tighten the two nuts (B) to
hold the housing in place. IMPORTANT: Inside nut (B)
should not contact spring housing (A) when tight.
B
C
A
D
A
B
OPERATIONS
Your Drill Press should be used with drill bits that have shank diameters of 5/8" or less.
The following directions will give the inexperienced operator a start on common drill press operations. Use scrap
material for practice to get a feel of the machine before attempting regular work. IMPORTANT: After installing a drill
bit into the chuck, always tighten the jaws of the chuck using the key supplied in all three locations of the chuck,
two of which are shown at (E) Fig. 30.
IMPORTANT: When the workpiece is long enough, it should always be positioned on the table with one end against
the column, as shown in Fig. 30. This prevents the workpiece from rotating with the drill bit or cutting tool, causing
damage to the workpiece or personal injury to the operator. If it is not possible to support the workpiece against the
column, the workpiece should always be fastened to the table using clamps or a vise.
Fig. 30
E
E