Machine Use - Delta DP350 Manual De Instrucciones

MACHINE USE

Use drill bits with a shank of 1/2" or less in diameter with this drill press. The following information 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.
The use of accessories and attachments not recommended by Delta may result in risk of injury.
IMPORTANT: When the workpiece is long enough position it on the table with one end against the left side of the
column (Fig. 28). This prevents damage to the workpiece or personal injury caused by the workpiece rotating with the
drill bit or cutting tool. If the workpiece cannot be supported against the column, fasten it to the table with clamps or a
vise.
INSTALLINg AND REMOVINg DRILL BITS
Disconnect the machine from the power source!
1. Insert the smooth end of the drill bit (A) Fig. 29 in the chuck (B) as far as it will go. Back the bit out 1/16", or up to
the flutes for small bits.
2. Center the drill bit (A) Fig. 29 in the chuck (B) before tightening the chuck with the key (C).
3. Turn the chuck key (C) Fig. 29 clockwise to tighten and counter-clockwise to loosen the chuck jaws.
4. Tighten all three chuck jaws to prevent bit slippage.
Remove the chuck key (C) Fig. 29 from the chuck before starting the drill press.
NOTE: Your chuck key (C) is equipped with a self-ejecting pin (D) to help minimize the hazard of the key being left in
the chuck.
Factors which determine the best speed to use are: kind of material being worked, size of hole, type of drill or other
cutter, and quality of cut desired.
Use the recommended speed for the drill press bit and workpiece material.
DRILLLINg IN WOOD
You can use twist drills, although intended for metal drilling, for boring holes in wood. 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 that have a screw tip. At drill press speeds, they can lift the workpiece off of the table and spin it.
For through boring, align the table so that the bit will enter the center hole. 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 you can clamp the table and drill
press head in the center position from 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 as a base block under the work to help reduce splintering and to protect the point of the bit.
DRILLINg IN METAL
Use clamps to hold the workpiece. Never hold the workpiece in your hand. The drill bit can seize the work at any
time, especially when breaking through the workpiece. The workpiece could spin and pull out of your hand, causing
personal injury and/or damage to the bit.
Clamp the workpiece firmly. Tilting, twisting or shifting results not only in a rough hole, but also increases drill bit
breakage. For flat work, place the workpiece on a wooden base and clamp it firmly down against the table. If the
workpiece has an irregular shape and cannot be placed flat on the table, securely block and clamp it.
Fig. 29
Fig. 28
CORRECT DRILLINg SPEEDS
13
C
B
A
D