Delta 11-985 - Manual (Page 13)

13
Fig. 32
Fig. 33
Fig. 34
Fig. 35
DRILLING HOLES TO DEPTH
Where a number of holes are to be drilled to exactly the
same depth, a depth stop is provided in the pinion shaft
housing and is used as follows:
1. Loosen lock screw (A) Fig. 32, and rotate housing (B)
until the pointer (C) lines up with the desired depth
indicated on scale (D). Then tighten lock screw (A).
2. All holes will then be drilled to the exact depth as
indicated on scale (D) Fig. 32. NOTE: Scale (D) is
calibrated in both inches and millimeters.
ADJUSTING SPINDLE
RETURN SPRING
For the purpose of automatically returning the spindle
upward after a hole has been drilled, a spindle return
spring is provided in the spring housing (A) Fig. 33. 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 drill press from the power source.
2. Loosen the two nuts (B) Fig. 33, approximately 1/4".
Do not remove nuts (B) from shaft (C).
3. While firmly holding spring housing (A) Fig. 34, 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 decrease spring
tension. Then tighten the two nuts (B) to hold the
housing in place. IMPORTANT: Nut (B) should not
contact spring housing (A) when tight.
OPERATION
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.
WARNING: The use of accessories and attach-
ments not recommended by Delta may result in risk
of injury.
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. 35. 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.
C A
B
D
B
C
A
D
A
B