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ADJUSTMENTS:
The following adjustments may be necessary to
keep your drill press at its most efficient operation.
If the automatic feed return fails to return the
chuck to the top of the stroke or if the return action
becomes sluggish, the tension may be adjusted as
follows; Lock the chuck at the top of its stroke
using the quill lock handle. Hold the feed return
adjusting knob firmly and release the feed return
adjusting knob lock screw, Fig. 1. Turn the adjust-
ing knob counter-clockwise and re-tighten the lock
screw.
Release the quill lock handle and run the
chuck down. If spring tension is still not sufficient
repeat the above adjustment until it is.
FIGURE 3
To change the locked position of table lock handle
or headstock lock handle (Fig. 1 ) , remove handle
and rotate table lock, item 67, or headstock lock,
Item 5 1 , 180°. Re-insert and tighten lock handle.
CAUTION: Headstock or table assembly should
be securely supported when changing locked position
of handles.
The Quill Lock Handle, (Fig. 1 ) for greatest ease
of operation should point down when locked.
To
change the position of the handle, loosen the set
screw, remove handle from hex head screw and ro-
tate to correct position. Replace handle and tighten
set screw.
Belt tension adjustment is made by loosening
the motor mount lock screws and moving the motor
mount away from the tool. Excessive tension short-
ens bearing life, causes excessive belt wear and robs
the motor of power. Tension should be just enough
to prevent slippage at normal operating speeds and
feeds.
Tighten pulley set screws after a few hours
operation.
TYPES OF BITS:
A variety of bits are available for use in your drill
press.
For metal drilling the standard twist drill will
prove adequate for the home -work shop. If exten-
sive commercial operations are to be performed,
high speed steel drills although more expensive, will
prove to be the better tool as higher operating speeds
are possible plus longer cutting edge life.
The solid center wood bit has a single flute turn-
ing around a solid center but carries two spurs.
The fluted bit is an excellent all purpose wood
bit.
It has two flutes each terminating in a cutting
edge and spur.
The best bit for high quality machine drilling in
wood is the spur machine bit. It is the stiffest drill,
tracks nicely and produces an exceptionally smooth
hole.
For larger holes, a hole saw is available for either
metal or wood. This bit has a center drill for pilot
and teeth around the outer rim similar to a saw
blade.
Also, for large holes in wood an expansion bit
may be used. When the expansion bit or any hand
wood bit is used in the drill press, the screw point
must have the threads removed from it so that it
will not enter the wood too rapidly. These threads
may be filed off. (See Fig. 3.)
Countersinking in wood may best be accom-
plished by using the double lip style. It will give
the cleanest cut and will not gum up under con-
tinuous operation.
Length of Cutting lips
must be equot
Heel of
Cutting Lip
FIGURE 4
DRILL SHARPENING:
When grinding twist drills, in order to maintain the
efficiency of the drill, extreme care should be exer-
cised. The dead center of the point must be main-
tained, that is, the cutting lips must be the same
length, Fig. 4. Also their angle in relation to the
center line of the drill must be equal. The angle
should be approximately 60 degrees, 120 degrees
included, for metal and 35 degrees, 70 degrees in-
cluded, for wood. The cutting lip should be relieved
gradually behind the cutting edge so that the clear-
ance at the heel is about 1 2 degrees.
OPERATION:
Chuck removal;
If at any time you wish to remove the chuck merely
loosen the chuck holding collar and continue to turn
it. This will force the chuck from the spindle taper.
Do not attempt to drive or wedge the chuck off as
you may damage the spindle or bearings.
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