Craftsman 315.115430 Operator's Manual page 14

INSTALLING BITS
See Figures 10 - 11.
 Lock the switch trigger by placing the direction of
rotation selector in the center position.
 Open or close the chuck jaws to a point where the
opening is slightly larger than the bit size you intend to
use. Also, raise the front of the drill slightly to keep the
bit from falling out of the chuck jaws.
 Insert the drill bit.
 Tighten the chuck jaws on the drill bit.
CHUCK
(RELEASE)
JAWS
DRILL BIT
LOCK
(TIGHTEN)
UNLOCK
CHUCK
COLLAR
CHUCK
BODY
RIGHT
OPERATION
WARNING:
into the chuck jaws. Do not insert the drill bit into the
chuck jaws at an angle then tighten, as shown in
figure
from the drill, resulting in possible serious personal
injury or damage to the chuck.
 Rotate the chuck clockwise 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. Do not
use a wrench to tighten or loosen the chuck jaws
Fig. 10
REMOVING BITS
See Figure 10.
 Lock the switch trigger by placing the direction of
rotation selector in the center position.
 Rotate the chuck sleeve clockwise to open the chuck
jaws.
NOTE: Rotate the chuck body in the direction of the
arrow marked UNLOcK to loosen the chuck jaws. Do
not use a wrench to tighten or loosen the chuck jaws.
 Remove the drill bit.
14
Make sure to insert the drill bit straight
11. This could cause the drill bit to be thrown
WRONG
Fig. 11