Dremel 4300 Operating/Safety Instructions Manual page 32

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2. Unscrew the nose cap 3 from the tool (Fig.
A2).
3. Remove the collet 4 (Fig. A3).
Note: If the collet nut and collet are not
removed from the motor shaft, the tool will not
function properly.
4. Install the driver cap 5 on the motor shaft 6
and tighten (Fig. A4).
To prevent damage to
tool, do not overtighten
driver cap. Tighten the driver cap finger tight
and then tighten an additional 1/3 turn with the
wrench or nose cap. (Wrench included with
your rotary tool kit)
5. Attach by screwing the collar of the Flex
Shaft 7 to the rotary tool. Make sure the
square end of the center core engages the
square hole socket in the driver cap
(Fig. A5).
6. Refer to "Dremel Chuck" and "Collets"
sections of the rotary tool manual for
instructions on how to change accessories.
Do not pull out center
core to engage into
driver cap. This could cause disengagement
of center core from handpiece. If tool stops
when shaft is bent, center core may be lodged
in driver cap. Loosen shaft and remove core
from driver cap. Then screw flexible shaft onto
rotary tool housing again.
Operating Instructions
Run-In before Operation
For optimum performance, allow your new flex
shaft attachment to run at high speed on your
rotary tool in a vertical position for 2 minutes
before use (Fig. A7).
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Disengagement of the Flex Shaft
The flexible shaft may become disengaged if
the motor of your rotary tool is not elevated
higher than the working end of the Flex Shaft.
Collet Removal and Replacement
Four different size collets to accommodate
different shank sizes, are sold separately for
your Flex Shaft. To install a different collet,
remove the collet nut 2 and remove the old
collet 4. Insert the unslotted end of the collet in
the hole in the end of the Flex Shaft 8. Replace
collet nut on the shaft (Fig. A5).
Flexible Shaft Lubrication
The Flex Shaft should be lubricated after every
25-30 hours of use. To lubricate, unscrew the
Flex Shaft assembly from the motor housing.
Pull the center core out of the Flex Shaft
assembly. Wipe a very thin film automotive
wheel bearing grease on to the center core and
reinsert it back into the shaft. To prevent
damage to tool do not over grease shaft.
Too much grease will cause the unit to
overheat.
Reattach the Flex Shaft to the rotary tool.
FIG. A7
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