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. 34. This prevents
the workpiece from rotating with the drill bit or cuttingFig. 34 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.
INSTALLING AND REMOVING DRILL BITS
1.Insert smooth end of drill bit (A) Fig. 35, as far as it will go into the chuck (B), and then back the bit out 1/16", or up to the flutes for small bits.
2.Make certain that the drill bit (A) Fig. 35, is centered in the chuck (B) before tightening the chuck with the key
(C).
3.Turn the chuck key (C) Fig. 35, clockwise to tighten and counterclockwise to loosen the chuck jaws.
4.Tighten all three chuck jaws to secure the drill bit sufficiently so that it does not slip while drilling.
5.MAKE SURE chuck key (C) Fig. 35, is removed from chuck before starting drill press. Your chuck key (C) is equipped with a
D
B
C
A
Fig. 35
FASTENING DRILL PRESS TO SUPPORTING SURFACE
If during operation there is any tendency for the drill press to tip over, slide or walk on the supporting surface, the drill press base must be secured to the supporting surface with 125mm (5") long carriage screws, flat washers, lock washers, and hex nuts through the two holes (A) Fig. 36, located in the drill press base.
A 
Fig. 36
BORING IN WOOD
Twist drills, although intended for metal drilling, may also be used for boring holes in wood. However, machine spur bits are generally preferred for working in wood; they cut a flat bottom hole and are designed for removal of wood chips. Do not use hand bits which have a screw tip; at drill press speeds they turn into the wood so rapidly as to lift the work off the table and whirl it.
For through boring, line up the table so that the bit will enter the center hole to avoid damage. Scribe a vertical line on the front of the column and a matchmark on the table bracket, so that the table can be clamped in the center position at any height.
Feed slowly when the bit is about to cut through the wood to prevent splintering the bottom face. Use a scrap piece of wood for a base block under the work; this helps to reduce splintering and protects the point of the bit.
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