Skil HD529401 Owner's Manual page 17

Install and Remove Bits (Fig . 9)
WARNING
if attempting to grasp the spinning chuck.
WARNING
Your tool is equipped with a keyless chuck to tighten or release bits in the chuck jaws. The
arrows on the chuck indicate the direction in which to rotate the chuck body in order to LOCK
(tighten) or UNLOCK (release) the chuck jaws on the bit.
a. Lock the variable-speed trigger switch "OFF" on the tool by placing the direction-of-rotation
selector in the center position.
b. Remove the battery pack and select the Drill Position.
To install the bit:
c. Rotate the chuck body counterclockwise, as viewed from chuck end, to open the chuck to
approximately the bit diameter.
d. Insert a clean bit up to the drill-bit flutes for small bits, or as far as it will go for large bits.
Close the chuck by rotating the chuck body clockwise and securely tighten by hand.
To remove the bit:
e. Rotate the chuck body counterclockwise, as viewed from the chuck end, to open the chuck.
f. Remove the bit.
Fig.9
UNLOCK (release)
WARNING
Drill Bits
Always inspect drill bits for excessive wear. Use only bits that are sharp and in good condition.
Twist Bits: Available with straight and reduced shanks for wood and light-duty metal drilling.
High-speed bits cut faster and last longer on hard materials.
Carbide-Tipped Bits: Used for drilling stone, concrete, plaster, cement, and other unusually
hard nonmetal materials. Use continuous, heavy feed pressure when using carbide-tipped
bits.
Do not use the power of the drill while grasping chuck to loosen or
tighten the chuck jaws on the bit . Friction burn or hand injury is possible
Do not use bits with damaged shanks .
Use protective gloves when removing the bit from the tool, or first
allow the bit to cool down . The bit may be hot after prolonged use .
LOCK (tighten)
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