Craftsman 10137 - 1/2 in. Corded Hammer Drill Operator's Manual page 11

A
WARNING: Always unplug the tool when installing
or removing bits, adjusting settings, or when the tool
is not in use. Failure to unplug the tool may result in
accidental starting and serious personal injury.
SPINDLE LOCK
See Figure 3.
[] To lock the spindle, depress and hold the spindle lock
button.
[] While keeping the button depressed, rotate the chuck
clockwise until the spindle clicks into a locked position
and will not rotate further.
[] To unlock, release the button.
NOTE: Always be sure the spindle lock button is released
and the spindle lock is disengaged before turning the drill
ON.
INSTALLING BITS
See Figure 3.
[] Unplug the drill.
[] Lock the spindle.
[] Rotate the chuck sleeve clockwise to open the chuck
jaws.
[] Insert the drill bit.
[] Release the spindle lock.
A
WARNING: Make sure to insert the drill bit straight
into the chuck jaws. Do not insert the drill bit into the
chuck jaws at an angle then tighten, as shown in fig-
ure 4. This could cause the drill bit to be thrown from
the drill, resulting in possible serious personal injury
or damage to the chuck.
[] Rotate the chuck counterclockwise to tighten the
chuck jaws securely on the bit.
NOTE: Rotate the chuck body in the direction of the
arrow marked LOCK to tighten the chuck jaws.
REMOVING BiTS
See Figure 3.
[] Unplug the drill.
[] Lock the spindle.
[] Rotate the chuck sleeve counterclockwise to open the
chuck jaws.
[] Remove the drill bit.
[] Release the spindle lock.
DRILLBIT
CHUCK
JAWS
KEYLESS
CHUCK
RIGHT
WRONG
SPINDLELOCK
BUTTON
Fig. 3
Fig. 4
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