Dremel 3100 vs 4000: Which Corded Kit Fits You? (October 2026)
Choose the Dremel 4000 for its 1.6 Amp motor and electronic speed control; choose a 3100 kit for its 1.2 Amp motor, 5 speed settings and accessory options. Both are corded tools with a 5,000–35,000 RPM range.
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Choose the Dremel 4000 for its 1.6 Amp motor and electronic speed control; choose a 3100 kit for its 1.2 Amp motor, 5 speed settings and accessory options. Both are corded rotary tools with a 5,000–35,000 RPM range.
The Dremel 4000-2/32 has a 1.6 Amp motor, compared with the 1.2 Amp motor in the 3100. The 3100-2/60 includes 60 accessories, while the 3100-1/15 includes 15.
Your choice depends on whether motor power, speed control or kit contents matter most. For more model context, see our guide to which Dremel rotary tool to buy.
Dremel 3100 vs 4000: which should you choose?
Pick the 4000 for its higher motor rating; pick the 3100 if its 5 speed settings or kit contents fit your work better. Both cover the same stated speed range, so compare how they control speed and what each kit includes.
The 4000 has a 1.6 Amp motor and electronic speed control. Dremel describes it as 33% more powerful than the 3100.
The 3100 has a 1.2 Amp motor with 5 speed settings. Both models reach 35,000 RPM and go down to 5,000 RPM.
That shared range means the choice isn't simply about maximum speed. Consider the motor rating, the way you prefer to set speed, and whether you need a larger accessory set.
How do the 3100 and 4000 compare on motor power?
The 4000 has the higher motor rating at 1.6 Amp, while the 3100 is rated at 1.2 Amp. The 4000 may suit you if its higher motor rating is a priority.
The 4000's stated uses include cutting, deburring, grinding, polishing and sanding. Dremel also identifies carving and engraving among its uses.
The 3100 is also suited to varied work, including cutting, sanding, cleaning, polishing, carving, engraving, grinding and sharpening. Its lower Amp rating does not mean it lacks those functions, but its motor rating is lower than the 4000's.
Does higher motor power mean the 4000 is always better?
No. The 4000's higher motor rating is one reason to choose it, but light work or a larger accessory set may make a 3100 kit a better fit.
Match the tool to the tasks and materials you expect to work on. Follow the accessory instructions for speed and use, and choose an accessory suited to the task.
How does speed control differ?
The 3100 uses 5 speed settings, while the 4000 has electronic speed control. Both have a stated range of 5,000–35,000 RPM.
The 3100's settings give you defined speed steps to choose from. This may suit you if you prefer a small set of clear options for common tasks.
Dremel says the 4000's electronic speed control maintains consistent speed during demanding applications. That feature may be useful when you want speed to stay consistent as the work becomes harder.
The product descriptions don't indicate which control will feel better in your hand. If you prefer stepped settings, consider the 3100; if electronic speed control matters more, consider the 4000.
Which Dremel kit includes the accessories you need?
Choose the 3100-2/60 for the most included accessories, or the 3100-1/15 for a smaller kit. The 4000-2/32 sits between them, with 32 accessories and 2 attachments.
The 3100-2/60 includes 60 accessories, 2 attachments, a wrench and a user manual. It also has a flexible 6-foot cord.
The 3100-1/15 includes 15 accessories, 1 attachment, a wrench and a user manual. It shares the 3100's 1.2 Amp motor and 5 speed settings.
The 4000-2/32 includes 32 accessories and 2 attachments. If a specific accessory will decide your purchase, check that it is included in your chosen kit or compatible with the tool.
Is the 3100-2/60 a better fit than the 3100-1/15?
It depends on whether you'll use the additional accessories. The larger kit includes 45 more accessories and one more attachment than the 3100-1/15.
A bigger kit can be convenient when you're starting without rotary tool accessories. If you already have the bits you need, a smaller kit may help you avoid adding items that will sit unused.
What are the 3100 and 4000 suited to?
The 4000 suits projects where its higher motor rating and electronic speed control are priorities; the 3100 suits work where its speed settings and kit options fit your needs. Both are corded tools for a range of rotary tool applications.
Stated uses include cutting, detail sanding, engraving, wood carving and polishing. The accessory and material determine which specific task is suitable, so check the instructions for each accessory.
A rotary tool differs from an angle grinder in size and typical work. Our guide to angle grinder vs die grinder explains how those tools differ, while what a die grinder is used for covers another tool for detailed grinding work.
What should you consider about corded use?
Both models are corded, so choose one if your work area has access to power. The 3100-2/60 specifically has a flexible 6-foot cord.
A cord supports extended sessions without waiting for a battery to recharge, but it also limits how far you can work from an outlet. Plan the workspace so the cord stays clear of the workpiece and your movement.
If cordless operation matters more, compare these kits with our guide to best cordless rotary tools. That can help you decide whether a battery-powered model suits your work area.
Which Dremel kit fits you best?
Choose the Dremel 4000-2/32 for its higher motor rating and electronic speed control; choose the 3100-2/60 for its larger accessory set. The 3100-1/15 has the same 3100 motor and speed settings with fewer included accessories.
The 4000 is the clearest pick if you prioritize its 1.6 Amp motor. Choose the 3100-2/60 if its 60 accessories and 5 speed settings better match your needs.
Pick the 3100-1/15 when a smaller set is enough. If you are still comparing rotary tool styles and models, start with our Dremel model guide.
Our score weighs specs, features and buyer feedback against what you're shopping for.
| Product | Best for | Motor | Speed | Kit | Our score |
|---|---|---|---|---|---|
| Dremel 4000-2/32 Rotary Tool Kit | electronic speed control | 1.6 Amp | 5,000–35,000 RPM | 2 attachments, 32 accessories | 8.8 |
| Dremel 3100-2/60 Rotary Tool Kit | a larger accessory set | 1.2 Amp | 5,000–35,000 RPM | 2 attachments, 60 accessories | 8.0 |
| Dremel 3100-1/15 Rotary Tool Kit | a smaller accessory set | 1.2 Amp | 5,000–35,000 RPM | 1 attachment, 15 accessories | 7.8 |
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Frequently asked questions
Is the Dremel 4000 more powerful than the 3100?
Yes. The 4000 has a 1.6 Amp motor, while the 3100 has a 1.2 Amp motor, and Dremel describes the 4000 as 33% more powerful than the 3100.
Both have a 5,000–35,000 RPM speed range, so the power difference doesn't change their stated speed limits.
What is the difference between the Dremel 3100-2/60 and 3100-1/15?
Both are 1.2 Amp corded 3100 tools with 5 speed settings from 5,000 to 35,000 RPM. The 3100-2/60 includes 2 attachments and 60 accessories, while the 3100-1/15 includes 1 attachment and 15 accessories.
Does the Dremel 4000 have variable speed?
Yes. The 4000 is a variable speed corded rotary tool with a 5,000–35,000 RPM range and electronic speed control.
The 3100 also has variable speed, using 5 speed settings across the same range.
Which Dremel kit has more accessories?
The Dremel 3100-2/60 has the largest accessory set here, with 60 accessories and 2 attachments. The 4000-2/32 includes 32 accessories and 2 attachments, while the 3100-1/15 includes 15 accessories and 1 attachment.
Can the Dremel 3100 and 4000 use the same accessories?
The 3100 is compatible with Dremel tool accessories, and the 4000 supports accessories for cutting, sanding, cleaning, polishing, carving, engraving, sharpening and grinding. Check compatibility for the specific accessory and task before you use it.
