Maintenance

Service

!Preventive maintenance per- WARNING formed by unauthorized person-

nel may result in misplacing of internal wires and components which could cause serious hazard. We recommend that all tool service be performed by a Dremel Service Facility.

CARBON BRUSHES

The brushes and commutator in your tool have been engineered for many hours of dependable service. To maintain peak efficiency of the motor, we recommend every two to six months the brushes be examined. Only genuine Dremel replacement brushes specially designed for your tool should be used.

BRUSH

 

DOOR

CURVED END OF

 

 

BRUSH MUST

BRUSH

MATCH CURVATURE

OF HOUSING

 

BRUSH

SPRING

MAINTENANCE OF REPLACEABLE BRUSHES MODEL 398

The brushes should be inspected frequently when tools are used continuously. If your tool runs sporad- ically, loses power, makes unusual noises or runs at a reduced speed, check the brushes. To continue using the tool in this condition will permanently damage your tool.

To Remove Brush Door

Disconnect the tool from the power supply. Each brush door is held in place by a snap latch. To disengage latch, place screwdriver end of wrench (included) in slot at rear of door and pry up as shown in Figure 1. With latch disengaged, using a little force, pull up rear of door and lift away brush door and spring assembly from housing, Figure 2.

Check Both Brushes

Turn tool so the brush falls out of holder and check each brush. If the brush is less than 1/8" long and the end surface of the brush that contacts the commutator is rough and/or pitted, they should be replaced. Check

FIG. 1

FIG. 2

both brushes. Usually the brushes will not wear out simultaneously. If one brush is worn out, replace both brushes. Make sure the brushes are installed as illus- trated. The curved surface of the brush must match the curvature of the commutator.

To Replace Brush Door

Rest squared underside of brush door on the squared cavity openings. Check to be sure the spring rests on the V groove of the brush, Figure 3. Push front of door down into the slot, Figure 4, then push down and snap the rear latch into it’s slot, Figure 5.

After replacing brushes the tool should be run at no- load; place it on a clean surface and run it freely for 5

Any Questions Call

1-800-437-3635 (1-800-4-DREMEL)

FIG. 3

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Dremel 398 owner manual Carbon Brushes, Maintenance of Replaceable Brushes Model
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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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