Dremel 4300 Consignes De Fonctionnement/Sécurité page 11

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DREMEL CHUCK
Dremel Chuck allows you to quickly and
easily change accessories on Dremel Rotary
Tools without changing collets. Accepts
accessories with 1/32" - 1/8" shank. To
loosen, first press shaft lock button and
rotate the shaft by hand until the lock
engages the shaft preventing further rotation.
running.
With the shaft lock engaged use the wrench,
the EZ Twist Nose Cap, or your fingers to
loosen the chuck and open the jaws.
Remove the accessory from the chuck. If
necessary, continue loosening the chuck so
that the new accessory fits between the jaws.
Insert the new accessory into the chuck far
enough so that there is approximately 1/4"
between the end of the chuck and the
beginning of the working part of the
accessory (drill bit flutes, sand paper,
engraving end, etc.). With the shaft lock
engaged, tighten the chuck using the EZ
Twist Nose Cap or wrench to secure the
accessory.
Helpful Tips when using the
Dremel Chuck
• The Dremel Chuck and the collet and collet
nut system are interchangeable on this tool.
While the chuck will provide you with the best
experience for changing accessories, the
collet and collet nut will provide a more
precise accessory holding solution especially
in heavier side load applications. If you will be
using your rotary tool for routing, heavy wood
or metal cutting, heavy sanding, or carving
you will probably have a better experience
using the collet and collet nut.
• The Dremel Chuck needs to be securely
tightened in order to retain the accessory
during use. If you find the accessory slipping
in the chuck, use the included EZTwist
Nosecap or wrench to tighten the chuck
around the bit. If further slippage persists,
switch to using the collet and collet nut.
• The jaws of the chuck can become displaced
if dropped, pried against, or filled with dust
causing the accessory to no longer run true
and concentric. This is often called run-out.
To reset the jaws, apply the following
procedure:
1. Remove the accessory from the chuck.
2. Clean the chuck if necessary using
compressed air.
Do not engage lock
while the Rotary Tool is
FIG. 3
SHAFT LOCK
BUTTON
Always
goggles when cleaning
tools with compressed air.
3. Press shaft lock button and tighten the chuck
until the jaws extend past the outer surface of
the chuck, approximately 1/8".
4. Push the end of the chuck firmly against a
hard flat surface to be sure the jaws are all
seated axially.
5. Continue to hand tighten the chuck until the
jaws completely close.
6. Loosen the chuck, and reinsert a straight
accessory.
7. Turn the tool by hand and observe if there is
any run-out. If there is obvious run-out,
repeat the procedure.
8. Turn the tool on to the lowest speed setting
and observe for run-out. If there is obvious
run-out, check that the accessory is straight
before repeating the procedure.
BALANCING ACCESSORIES
For precision work, it is important that all
accessories be in good balance (much the
same as the tires on your automobile). To true
up or balance an accessory, slightly loosen
chuck or collet nut and give the accessory or
collet a 1/4 turn. Re tighten the chuck or collet
nut and run the Rotary Tool. You should be able
to tell by the sound and feel if your accessory is
running in balance. Continue adjusting in this
fashion until best balance is achieved. To
maintain balance on abrasive wheel points,
before each use, with the wheel point secured
in the collet, turn on the Rotary Tool and run the
415 Dressing Stone lightly against the revolving
wheel point. This removes high spots and trues
up the wheel point for good balance.
DREMEL
CHUCK
wear safety
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