August 17, 2021

Dremel 9901 vs 9903 | Which Carving Bit Is Better?

If you are looking for a new carving bit for your rotary tool, the Dremel 9901 and 9903 are hard to beat. Both models are great tools for their price. In our article, we will compare the Dremel 9901 vs 9903. The Dremel 9901 is a cylindrical bit. It has a working diameter of 3.2 mm. The Dremel 9903 Tungsten Carbide Carving Bits are ideal for shaping, smoothing or removing material from extra hard materials. It has a bit diameter of 3.175 mm. Let us go into more detail.

Dremel 9901 Tungsten Carbide Cutter

Dremel 9901 is a Tungsten carbide cutter that is ideal for creative makers. That gives you multiple opportunities for your DIY projects. However, that does not mean you cannot have it for professional use. It has extensive tools and attachments that allow you to work on several tasks. 

The offers from the Dremel tool make it easy to use as you restore and improve your items. The chances of building new and original creations are high, and you are allowed to maximize the use of your tool as you finish projects that started using other wood tools.  

Dremel 9901 cuts through hard items except for diamonds. It is a versatile tool for shaping, carving, smoothing, and removing unwanted material. The Dremel tool is compatible with multiple Dremel rotary tools. These include cast iron and hardwoods. The high-speed bit tool also comes with slow speeds for metals and plastics. 

It operates at a maximum speed of 30,000 rpm and is known as a Tungsten carbide cutter. The cutter is tough, durable, and strong. It withstands the pressure of hard materials such as fired ceramics and hardened steel. You are allowed to use the tool for engraving tools and use garden equipment. 

Dremel 9901 comes with Tungsten carbide teeth for the manufacturing industry, and the multiple sizes have multiple sizes and use. It stays longer, and the tools are recyclable. It is durable and affordable due to the teeth being stable. The carbide tool works in construction, farming, and woodwork. 

The Dremel 9901 is prone to wear and tear, and it also breaks depending on what you are working on. Visit machine shops for re-sharpening, and there are instructions on keeping the tool separate from other metal items to avoid friction, preventing downtime and loss of time spent on a project.


  • Versatile
  • Fast
  • Smooth
  • Durable
  • Stable
  • Recyclable


  • It does not have a round tip

(More Details about the Dremel 9901)

Dremel 9903 Tungsten Carbide Cutter

Dremel 9903 is a Tungsten Carbide Cutter for shaping, smoothing, and removing material. The chances of having a tough time on hard materials are hard. Grinding hard materials is quick and smooth. Hardened steel, fired ceramics, stainless steel, hard plastics, and hardwoods are hard materials. 

Deemed 9903 is a high-speed carving tool that works on complex applications. It even cracks the hardest material that is close to a diamond. It also has slower and prolonged speeds for metal items, plastics, and delicate materials. 

If you are aiming for effective cutting, use the sides of the bit rather than the point. The warranty covers only product defects. The bit’s diameter is 3.175mm, and the maximum operating rpm is 35,000rpm. 

It is not safe to use the tool for drilling or enlarging holes less than twice the diameter of the cutter. The preventive measure has to keep your accessories safe. Secure the items by making use of a stable surface while working. That prevents the carbide surface from contacting the hole side and breaking. 

The carbide teeth are fast-cutting, removing the material with minimum loading. The chances of breaking the cutter are high when using the tip. Use the tool on fiberglass, wood, plastic, epoxy, rubber, laminates, particleboard, and ceramic tile 1/8″ shank. 

The tool comes in various sizes and shapes to match intricate ceramics, wood carvings, and jewelry. That is why it is common to make complicated printed circuit boards. The engraving tool on steel and hard materials is good, but it is more effective on wood, plastic, and soft metals. 


  • Versatile
  • Quick
  • Smooth
  • High speed
  • Minimum loading
  • Variety sizes


  • Engraving hard materials is a bit slow

(See Additional Information)



Dremel 9903 is a high-speed bit made of tungsten carbide cutter. It cracks the hardest material that is close to a diamond. It is a versatile tool with high speeds for hard material, slow speeds for metal, and slower speeds for plastic. The difference comes with the Dremel 990 speed limit of 30,000 rpm, whereas Dremel 9903 runs up to a maximum of 35,000.rpm. 

Carbide teeth

Both Dremel tools use carbide teeth that are ideal for hard materials. The teeth are prone to wear and tear. That is why you must check the teeth before starting the machine. The moment they are not sharp, effectiveness goes down. 

Drill bits

The drill bits are the same, and they work similarly. The shape smoothen and remove unwanted material with ease. There is no need to buy multiple tools to suit different applications since these cover a wide range of tasks. 


These Dremel tools are lightweight. They have a pencil-like design that makes it easy for the user to operate the Dremel tool. Dremel 9901 is a bit heavier than Dremel 9903. They do not take up more storage space, and they are handy.

EZ SpeedClic System

This system is proof that Dremel gives you a wide range of numerous accessories that meet your needs. Changing accessories is made quick, easy, and keyless on both Dremel tools. That makes you comfortable working on your items for long hours. Even an amateur does not take long to get used to the operating system of the tools.

Color coding system

The color-coding system helps you select the right accessories for a specific project you are working on. Each color represents an application that you need to master. It does not select the materials to be used. 

What could be better

Dremel 9901

  • A round trip would be better on large materials.

Dremel 9903

  • It could have been faster when engraving hard materials. 

Similar Features

  • They are both high-speed cutting tools.
  • They cover a wide range of applications. 
  • Both have higher, low, and lower speeds.
  • They are both fast.
  • They are good at hard materials.

Key Difference between the Dremel 9901 and Dremel 9903

  • Dremel 9903 has a round tip, whereas Dremel 9901 has a flat tip.

The verdict

So will it be the Dremel 9901 or the Dremel 9903 for you? Since the difference is in the tips, it’s your choice, depending on the applications you’ll focus on. Dremel tools have several features in common. They are suitable for hard materials and have carbide teeth that make them fast when working on them. The Dremel 9903 might be the best for users on a tight budget.

David D. Hughes

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