Delta 900585 - Manual (Page 12)

12
DRILLING HOLES
TO DEPTH
Where a number of holes are to be drilled to exactly the
same depth, the stop nuts on the threaded stop rod are
used as follows:
1. Lower the spindle until the pointer (A) Fig. 28, lines
up with the mark on the scale (B) you wish the depth to
be. Then thread the lower stop nut (C) down to contact
the depth stop (D) on the side of the head. Return the
spindle to the up position and tighten the upper stop nut
(E) against the lower stop nut (C).
2. Drill a test hole to check the adjustment and readjust
if necessary. All holes will be drilled to the depth indicated
by the setting of the lower stop nut (C) Fig. 28, as it
contacts the depth stop (D) when the spindle is lowered.
Fig. 28
Fig. 29
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 bored 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:
WARNING: MAKE SURE THE TOOL IS DISCONNECTED FROM THE POWER SOURCE.
1. Loosen the two nuts (B) Fig. 29, approximately 1/4”. Do not remove nuts (B) from shaft (C).
2. While firmly holding spring housing (A) Fig. 29, 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: Inside nut (B) should not contact spring
housing (A) when tight.
E
C
B
A
D
A
D
C
B