Dremel 398-49 owner manual Disengagement of the Flex-Shaft, Collet and Accessory Assembly, Do not

DM 2610934164 05-06 10/6/06 8:41 AM Page 7

Assembly - (cont.)

HOUSING

CAP

COLLET (inside)

Step 3. Remove the collet.

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. The #2222 Rotary Tool Stand is recommended to hold the rotary tool at the proper height.

Collet and Accessory Assembly

The collet assembly consists of a collet nut and collet. Take the collet nut

and collet that

were removed

from your tool in

step 2 and 3 and insert them into

the tip of the flex- shaft handpiece.

Note: If the collet nut and collet are not removed from the motor shaft, the tool will not function properly.

Step 4. Install the driver cap on the motor shaft and tighten.

MOTOR

Insert an accessory or bit as deeply as possible to avoid wobble during use. With the shaft lock button engaged on the flex-shaft handpiece retighten the collet nut.

SHAFT LOCK

BUTTON

SHAFT

DRIVER

CAP

! CAUTION	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. (Wrench included with your rotary tool kit)

Step 5. Attach by screwing the collar of the flex-shaft to the rotary tool. Make sure the square end of the center core engages the square hole socket in the driver cap.

Do not pull out center core to ! CAUTION 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.

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 and remove the old collet. Insert the unslotted end of the collet in the hole in the end of the flex-shaft. Replace collet nut on the shaft. Always use the collet which matches the shank size of the accessory you plan to use. Never force a larger diameter shank into a collet.

Do not	operate the
flexible shaft with a
sharp	or multiple
bends. Over bending		13CM
the shaft can generate
		RADIUS
excessive heat on the

jacket or hand piece

and may cause the flexible shaft to disengage from tool. The minimum recommended bend radius is 13cm.

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.

Contents of 225 Flex-Shaft Attachment

Qty.	Description
1	Flex-Shaft Assembly (1,07m long)
1	Driver Cap

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