Delta 20-950 User Manual

Page 14

When you want to drill a number of holes to the same depth, use the stop nut (A) Fig. 40 on the threaded stop rod (B).

DRILLING HOLES TO DEPTH

DISCONNECT MACHINE FROM POWER SOURCE.

Fig. 40

1. Insert the bit into the chuck.
2. Lower the chuck (G) Fig. 40, and the drill bit to your

chosen depth by rotating the pinion shaft handles (C).
Lock the quill in position by tightening the quill locking
lever (see (B) Fig. 43) on the right side of the head
underneath the pnion shaft handles.

NOTE: The quill locking lever is spring-loaded. Change it
by pulling out on the handle and repositioning the hub of
the handle on the nut located underneath the hub.
3. Depress the spring-loaded button (E) Fig. 40 and move

the stop nut (A) until the bottom of the nut contacts the
stop (F). Loosen the quill locking-lever (D) to allow the
chuck and drill bit to return to the up position.

4. Connect the machine to the power source and drill

a test hole to check the adjustment. Readjust, if
necessary, by rotating the stop nut (A) Fig. 40 for fine
adjustment. You do not have to depress the button (E)
to rotate the stop nut (A).

ADJUSTING THE SPINDLE RETURN SPRING

The spindle will automatically return slowly to its upper position when the handle is released. However, to adjust, if
necessary:

Loosen the nuts (B) Fig. 41, but do not remove. Make sure that the spring housing (A) remains engaged with head casting
(C).

While firmly holding the spring housing (Fig. 42), pull out the housing and rotate it (counter-clockwise to increase or
clockwise to decrease) until the boss (D) is engaged with the next notch on the housing. Tighten the two nuts (B) Fig.
41 to hold the housing in place

IMPORTANT: The inside nut (E) Fig. 42 should not contact the spring housing (A) Fig. 41.

DISCONNECT THE MACHINE FROM THE POWER SOURCE!

Fig. 42

Raise and lower the spindle with the pinion handles (A)
Fig. 43. You can lock the quill at any point in its travel by
tightening locking lever (B).

NOTE: The quill locking lever (B) is spring-loaded. Pull
outward on handle and reposition it on its hub (C).

RAISING AND LOWERING THE SPINDLE

Fig. 43

Fig. 41