Drilling Wood; Drilling Metal - Delta 18-900L Manual De Instrucciones

the spindle adapter and chuck fall from the quill.
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

to reduce the risk of injury, tighten all lock
handles before starting the machine. Loss of control of
the workpiece can cause serious injury.
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 drill bit slowly into the workpiece 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 protect
the point of the bit.

DrILLInG MetaL

to reduce the risk of injury, tighten all lock
handles before starting the machine. Loss of control of
the workpiece can cause serious injury.
Use clamps to hold metal workpieces. Never hold the
workpiece in your bare hand. The drill bit can seize the
work at any time, especially when breaking through the
workpiece and cause damage to the machine or injury
to you. The drill bit will break if the workpiece strikes the
column.
Clamp the workpiece firmly. Any tilting, twisting, or shifting results not only in a rough hole, but also in bit breakage. For flat
work, lay the workpiece on a wooden base and clamp it firmly against the table to prevent it from turning. If the workpiece
is of irregular shape and cannot lay flat on the table, securely block or clamp it.
S1
L1
W1
Fig. 47
Fig. 48
20
U1
t1
Fig. 46
V1
x1