Bosch Power Tools 275T6, 285T6, 395T6 Assembly, Rotary Tool is running, Dremel Keyless Chuck

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Assembly

Always unplug Rotary Tool ! WARNING before changing accessories,

changing collets or servicing your Rotary Tool.

SHAFT LOCK

BUTTON

COLLET

WRENCH

TO TIGHTEN

COLLET

NUT

TO LOOSEN COLLET

COLLET NUT — To loosen, first press shaft lock button and rotate the shaft by hand until the lock engages the shaft preventing further rotation.

!	CAUTION	Do not engage lock while the
		Rotary Tool is running.

With the shaft lock engaged use the collet wrench to loosen the collet nut if necessary. The collet nut must be loosely threaded on when inserting an accessory. Change accessories by inserting the new one into the collet as far as possible to minimize runout and unbalance. With the shaft lock engaged, finger tighten the collet nut until the accessory shank is gripped by the collet. Avoid excessive tightening of the collet nut when there is no bit inserted.

COLLETS — Four different size collets (see illus- tration), to accommodate different shank sizes, are available for your Rotary Tool. 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 tool shaft. Replace collet nut on the shaft.

Always use the collet which ! CAUTION matches the shank size of the

accessory you plan to use. Never force a larger diameter shank into a collet.

Note: Some rotary tool kits may not include all four collets sizes.

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 collet nut and give the accessory or collet a 1/4 turn. Re- tighten 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

COLLET IDENTIFICATION CHART

Collet sizes can be identified by the rings on the back end of collet.

1/32" Collet has one (1) ring. 1/16" Collet has two (2) rings. 3/32" Collet has three (3) rings. 1/8" Collet has no rings.

KEYLESS CHUCK

COLLET NUT			IDENTIFICATION
			RINGS
480
1/8"
	481		483
COLLET
	3/32"	482
			1/32"
	COLLET
		1/16"	COLLET

COLLET

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.

The hanger is provided for the use of hanging your tool while using the flex-shaft or for storage. If you do not use the hanger, remove it from the tool and snap it back into place underneath the cord so it will be out of the way while the tool is in use.

DREMEL KEYLESS CHUCK

Use only with black chuck #4486. Other chucks may

! CAUTION

not allow accessory bit to be tightened fully.

The keyless chuck holds various accessories with shank sizes 1/32" to 1/8" and is intended for light duty accessories such as drill bits, sanding drums, polishing accessories, wire and bristle brushes and cut-off wheels. The keyless chuck allows you to change accessories frequently, quickly and easily. There are some applications which can generate high forces on the bit or if you are unable to generate finger tightening pressure sufficient to secure the bit you must use the supplied wrench to assist in securing the bit.

Attaching the Keyless Chuck and Accessory Bit

Read and understand the manual for use of the

keyless chuck with the tool. ! WARNING Insert and securely tighten the

shank of the accessory well within the jaws of the chuck. If an accessory is not properly gripped within the jaws of a chuck it may loosen and fly out during

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