Assembly

!Always unplug Rotary Tool before WARNING changing accessories, changing

collets or servicing your Rotary Tool.

SHAFT LOCK

BUTTON

COLLET

WRENCH TO TIGHTEN

COLLET

NUT

COLLET

TO LOOSEN

COLLET

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

!Do not engage lock while the

CAUTION Rotary Tool is running.

With the shaft lock engaged use the collet wrench to loosen the collet nut if necessary. 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.

COLLETS

Four different size collets (see illustration), 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 matches the shank size of the accessory you plan to use. Never force a larger diameter shank into a collet.

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. Retighten 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

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.

COLLET

NUT

 

 

IDENTIFICATION

 

 

RINGS

480

 

 

1/8"

 

 

COLLET 481

 

 

3/32"

482

483

COLLET

1/16"

1/32"

 

COLLET

COLLET

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.

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.

Flex-shaft to Rotary Tool installation

! WARNING

Not for use with router bits. Use

with router bits will cause

kickback.

 

To attach the 225 flex-shaft (sold separately) to the Rotary Tool press the shaft lock and remove the collet nut, then remove the collet and housing cap as shown in Figure 1. Install the driver cap on the motor shaft as shown in Figure 2 and tighten.

!To prevent damage to tool, do not CAUTION 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).

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Dremel 398 owner manual Assembly, Collets, Balancing Accessories, Flex-shaft to Rotary Tool installation
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398 specifications

The Dremel 398 is a versatile rotary tool that has been designed to cater to the needs of hobbyists and professionals alike. Known for its exceptional performance and reliability, the Dremel 398 offers a range of features and technologies that make it a top choice for various applications, from woodworking to metalworking.

One of the standout features of the Dremel 398 is its variable speed control, which allows users to adjust the tool's speed from 5,000 to 35,000 RPM. This flexibility enables precise control for detailed tasks such as engraving, sanding, and polishing, while also providing the power required for heavier applications like cutting and grinding. Users can easily select the ideal speed for their specific project, ensuring optimum results and enhancing control.

The Dremel 398 is equipped with a robust motor that delivers high performance and durability. Its ergonomic design provides comfort during extended use, reducing hand fatigue and ensuring better handling. The lightweight construction of the tool makes it easy to maneuver, even in tight spaces. Coupled with a comfortable grip, the Dremel 398 allows for prolonged usage without discomfort.

Another impressive characteristic of the Dremel 398 is its compatibility with a wide array of accessories. The tool can effortlessly accommodate various attachments, including cutting wheels, sanding drums, and engraving bits, making it an all-in-one solution for diverse projects. This adaptability expands the range of tasks users can perform, eliminating the need for multiple tools.

Dremel has incorporated advanced technologies in the 398, including the EZ Twist nose cap, which simplifies accessory changes without the need for additional tools. This feature streamlines the switching process, allowing users to focus on their projects without interruption. Additionally, the tool's built-in ventilation system prevents overheating, prolonging the lifespan of the motor during intensive tasks.

Safety is also a priority with the Dremel 398 design. The tool includes protective features such as a reinforced housing and a secure chuck mechanism, ensuring that accessories are held tightly during operation. This attention to safety ensures users can work confidently and effectively.

In summary, the Dremel 398 is a powerful and adaptable rotary tool packed with features that cater to both beginners and seasoned craftsmen. Its variable speed control, ergonomic design, compatibility with numerous accessories, and advanced safety features make it an essential addition to any workshop. Whether for precise detailing or heavy-duty tasks, the Dremel 398 delivers exceptional performance and versatility, solidifying its reputation as a go-to tool for creative projects.
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