DRILLING

See Figure 11.

Fig. 11

When ddlling hard smooth surfaces use a center punch to mark desired hole location. This will prevent the drill bit from slipping off center as the hole is started. How- ever, the low speed feature allows starting holes without center punching if desired. To accomplish this, simply operate your drill at a low speed until the hole is started. The material to be drilled should be secured in a vise or with clamps to keep it from turning as the drill bit rotates.

Hold tool firmly and place the bit at the point to be drilled. Depress the switch trigger to start toot.

Move the drill bit into the workpiece applying only enough pressure to keep the bit cutting. Do not force or apply side pressure to elongate a hole.

CHUCK REMOVAL

See Figures 12, 13, and 14.

The chuck must be removed in order to use some accessories. To remove:

Lock switch trigger on your drill by placing the direction of rotation selector in center position. See Figure 2.

Insert a 5/16 inch or larger hex key wrench into the chuck of your drill and tighten the chuck jaws securely.

Tap the hex key wrench sharply with a mallet in a clockwise direction. See Figure 12. This will loosen the screw in the chuck for easy removal.

MALLET

KEYLESS

CHUCK

\

CHUCK

JAWS

HEX KEY WRENCH Fig. 12

Open chuck jaws and remove hex key wrench. Remove the chuck screw by turning it in a clock- wise direction. See Figure 13.

Note: The screw has left hand threads.

,_ WARNING: Be prepared for binding or bit breakthrough. When these situations occur, drill

has a tendency to grab and kick opposite to the direction of rotation and could cause loss of control when breaking through material. If not

prepared, this loss of control can result inFig. 13 possible serious injury.

When drilling metals, use a light oil on the drill bit to keep it from overheating. The oil will prolong the life of the bit and increase the drilling action.

If the bit jams in workpiece or if the drill stalls, release switch trigger immediately. Remove the bit from the workpiece and determine the reason for jamming.

11

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Craftsman 973.111471 owner manual Drilling, Chuck Removal, Mallet Keyless, Chuck Jaws, HEX KEY Wrench Fig

973.111471 specifications

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