Delta 17-959L Manual De Instrucciones página 18

MACHINE USE
NOTE: Use drill bits with shank diameters of 5/8" or less.
NOTE: After installing a drill bit, use the supplied key to tighten all three locations on the chuck.
The use of accessories and attachments not recommended by DELTA may result in risk of injury.
IMPORTANT: When the workpiece (A) Fig. 44 is long
enough, position it on the table with one end against the
left side of the column (B) to prevent the workpiece from
rotating. If it is not possible to support the workpiece
against the column, clamp the workpiece to the table.
INSTALLING AND REMOVING DRILL BITS
NOTE: Use drill bits with a shank of 5/8" or less in diameter.
DISCONNECT THE MACHINE FROM THE
POWER SOURCE!
1. Insert the smooth end of drill bit (A) Fig. 45 in the chuck (B) as far as it will go, and then back the bit out 1/16" (or
up to the flutes for small bits).
2. Center the drill bit (A) Fig. 45 in the chuck (B) before tightening the chuck with the key (C).
3. Turn the chuck key (C) Fig. 45 clockwise to tighten and counter-clockwise to loosen the chuck jaws.
4. Tighten all three chuck jaws to secure the drill bit sufficiently to prevent slipping.
5. Remove the chuck key (C) Fig. 45 from the chuck before starting the drill press. The chuck key (C) is equipped with
a self-ejecting pin (D) which helps minimize the potential for the key to be left in the chuck.
CORRECT DRILLING SPEEDS
Factors that determine the correct speed are 1) the workpiece, 2) the size of the hole, 3) the type of bit or other cutter,
and 4) the quality of cut.
Use the recommended speed for the the drill press bit and workpiece.
DRILLING WOOD
Twist drills, usually intended for metal drilling, can also be used for boring holes in wood. However, machine spur bits
are generally preferred for working in wood. These bits cut a flat-bottom hole and are designed for removal of wood
chips. Do not use hand bits (screw tip). At drill press speeds, they lift and rotate the workpiece.
For through boring, align the workpiece so that the bit will go through the center hole in the table. Scribe a vertical line
on the front of the column and a matching mark on the table bracket and the drill press head, so that the table and
drill press head can be clamped in the center position at any height.
Feed the workpiece slowly when the bit is close to cutting through the wood to prevent splintering the bottom face.
Use a scrap piece of wood as a base block under the work to reduce splintering and to protect the point of the bit.
Fig. 44
B
A
Fig. 45
18
B
A
D
C