Makita HP2070 Manual De Instrucciones página 6

Installing or removing drill bit
For Model HP2070, HP2070F
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 HP2071, HP2071F
1
2
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 clock-
wise to tighten the chuck.
To remove the bit, hold the ring and turn the sleeve coun-
terclockwise.
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.
4
1
2
3
1. Hold the sleeve of the drill chuck firmly with water
pump pliers or the like (Note: Do not hold the retain-
ing ring portion.)
002694
1. Chuck key
1
002695
1. Sleeve
2. Ring
004390
1. Sleeve
2. Hexagonal nut
3. Wrench 19
4. Retaining ring
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 clock-
wise as shown in the figure to loosen the drill chuck.
Depth gauge
1
The depth gauge is convenient for drilling holes of uni-
form depth. Loosen the side grip and insert the depth
gauge into the hole in the side grip. Adjust the depth
gauge to the desired depth and tighten the side grip.
NOTE:
• The depth gauge cannot be used at the position
where the depth gauge strikes against the tool
body.
OPERATION
Hammer drilling operation
CAUTION:
• There is a tremendous and sudden twisting force
exerted on the tool/bit at the time of hole break-
through, when the hole becomes clogged with
chips and particles, or when striking reinforcing
rods embedded in the concrete. Always use the
side grip (auxiliary handle) and firmly hold the tool
by both side grip and switch handle during opera-
tions. Failure to do so may result in the loss of con-
trol of the tool and potentially severe injury.
When drilling in concrete, granite, tile, etc., move the
action mode changing lever to the position of
to use "rotation with hammering" action.
Be sure to use a tungsten-carbide tipped bit.
Position the bit at the desired location for the hole, then
pull the switch trigger. Do not force the tool. Light pres-
sure gives best results. Keep the tool in position and pre-
vent it from slipping away from the hole.
Do not apply more pressure when the hole becomes
clogged with chips or particles. Instead, run the tool at an
idle, then remove the bit partially from the hole. By
repeating this several times, the hole will be cleaned out
and normal drilling may be resumed.
6
002696
1. Depth gauge
symbol