
5 
Installing side grip (auxiliary handle)
CAUTION: 
•  Always be sure that the side grip is installed 
securely before operation. 
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23
003040 
Always use the side grip to ensure operating safety. 
Install the side grip so that the teeth on the grip fit in 
between the protrusions on the tool barrel. 
Then tighten the grip by turning clockwise at the desired 
position. It may be swung 360° so as to be secured at 
any position. 
Installing or removing drill bit
For Model DP3003, DP4001, DP4003 
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2
003052 
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 
counterclockwise. 
For Model DP3002, DP4000, DP4002 
1
003053 
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. 
Depth gauge (optional accessory)
1
003059 
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 strikes against the tool 
body. 
OPERATION
Holding tool
When drilling a large hole with a hole saw, etc., the side 
grip (auxiliary handle) should be used as a brace to 
maintain safe control of the tool. 
Grasp the rear handle and the front grip firmly when 
starting or stopping the tool, since there is an initial and 
final reaction. 
When drilling action is forward (clockwise), the tool 
should be braced to prevent a counterclockwise reaction 
if the bit should bind. When reversing, brace the tool to 
prevent a clockwise reaction. If the bit must be removed 
from a partially drilled hole, be sure the tool is properly 
braced before reversing. 
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Holding against a stud
003076 
1. Reaction 
2. Reverse 
3. Forward 
1. Depth gauge 
1. Chuck key 
1. Sleeve 
2. Ring 
1. Side grip 
2. Teeth 
3. Protrusions