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Installing or removing drill bit
For Model HP1620, HP1620F
To install the bit, place it in the chuck as far as it will go.
Tighten the chuck by hand. Place the chuck key in each of
the three holes and tighten clockwise. Be sure to tighten all
three chuck holes evenly.
To remove the bit, turn the chuck key counterclockwise in
just one hole, then loosen the chuck by hand.
After using the chuck key, be sure to return to the original
position.
For Model HP1621, HP1621F
Hold the ring and turn the sleeve counterclockwise to open
the chuck jaws. Place the bit in the chuck as far as it will go.
Hold the ring firmly and turn the sleeve clockwise to tighten
the chuck.
To remove the bit, hold the ring and turn the sleeve counter-
clockwise.
NOTE:
• If the keyless drill chuck cannot be loosened because of
a drill bit being caught inside the jaws of the chuck,
loosen the drill chuck as follows.
1. Hold the sleeve of the drill chuck firmly with water
pump pliers or the like (Note: Do not hold the retaining
ring portion.)
2. Place the wrench 19, adjustable wrench or one of
other appropriate wrenches on the hexagonal nut at the
front of the drill chuck. Turn the wrench clockwise as
shown in the figure to loosen the drill chuck.
1. Chuck key
1
004364
1. Sleeve
2. Ring
1
2
004365
1. Sleeve
2. Hexagonal nut
3. Wrench 19
4. Retaining ring
1
2
3
4
004390