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.
B
D
C A
Fig. 32
A
B
C
Fig. 33
D
B
A
Fig. 34
Fig. 35
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