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2
1. Ring
2. Sleeve
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2
1. Depth gauge
2. Side grip
3. Grip base
OPERATION
For Model 8451
Hold the ring and turn the sleeve counterclockwise to open the chuck jaws.
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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 counterclockwise.
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Depth gauge
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The depth gauge is convenient for drilling holes of uniform 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
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strikes against the tool body.
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 operations. Failure to do
so may result in the loss of control of the tool and potentially severe
injury.
When drilling in concrete, granite, tile, etc., turn the action mode changing
lever to the position of
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 pressure gives best results. Keep the tool in posi-
tion and prevent 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.
symbol to use "rotation with hammering" action.
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