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.DISCONNECT MACHINE FROM POWER SOURCE.
2.Insert bit into chuck.
3.Lower the spindle until the pointer (C) Fig. 27, lines up with the mark on the scale (D) you wish the depth of the holes to be drilled. Then tighten lock screw (A).
Return the spindle to the up position.
4.Place the material to be drilled on the drill press table. Raise the drill press table until the material to be drilled just touches the drill bit.
5.Drill a test hole to check the adjustment and readjust if necessary. All holes will then be drilled to the exact depth as indicated on scale (D) Fig. 27. NOTE: Scale (D) is calibrated in both inches and millimeters.
ADJUSTING SPINDLE RETURN SPRING
The spindle is automatically returned to its upper most position when the handle is released. It is
B
D
C A
Fig. 27
A
recommended that the handle be allowed to slowly return to the top position after each hole has 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:
B
E
1.DISCONNECT MACHINE FROM POWER SOURCE.
2.Loosen nuts (B) and (E) Fig. 28. Make sure spring housing (A) stays engaged with head casting.
3.While FIRMLY HOLDING spring housing (A) Fig.
29pull out housing and rotate it until boss (D) is engaged with the next notch on the housing. Turn the housing counterclockwise to increase or clockwise to decrease spring tension. Turn nut (E) until it contacts spring housing (A), then back nut (E) out a 1/4 turn from spring housing (A). Tighten nut (B) against nut (E), to hold the housing in place. IMPORTANT: Inside nut
(E) should not contact spring housing (A) when tightened.
Fig. 28
E 
D
B
A
Fig. 29
13