The Versatile Rotary Tool: 5 Ways to Use It in Your Shop
When I'm considering adding a tool to my workshop, versatility is one of the first things I look for. Specialized tools are great when you have the space and budget, but in a smaller shop, I prefer tools that can handle several different tasks.
That's one reason the router is such a favorite among woodworkers. With the right bits and accessories, it can perform an impressive range of operations.
But there's another tool that deserves just as much attention: the rotary tool.
Often associated with the Dremel name, a rotary tool is essentially a compact, high-speed motor that accepts a wide variety of interchangeable bits and accessories.
And while it doesn't have the power of a full-size router, its compact size and precise control make it useful for jobs that would be difficult or impractical with larger tools.
From cutting and carving to grinding, polishing, and sanding, here are five ways to put a rotary tool to work in your woodworking shop.
What Is a Rotary Tool?
A rotary tool is a handheld power tool that spins interchangeable accessories at high speed.
Depending on the attachment, it can cut, shape, grind, polish, or sand a variety of materials.
Dremel is probably the best-known name in rotary tools, to the point that many people refer to the tools themselves as Dremels.
However, other manufacturers, including Foredom and RotoZip, offer tools designed for related applications.
The real advantage of a rotary tool is its ability to perform detailed work.
Its small size allows you to reach tight spaces, follow intricate patterns, and remove material gradually.
And because the accessories are interchangeable, one tool can handle a surprising number of workshop tasks.
1. Use a Rotary Tool as a Mini Router
One of the most useful rotary tool accessories is a plunge router base.
This attachment transforms the rotary tool into a small-scale router that's ideal for making precise cuts in small workpieces.
Rotary tool router bits are available in many familiar profiles, including straight bits, chamfer bits, roundover bits, and core box bits.
The routing process is similar to using a conventional plunge router.
You set the depth of cut, position the tool, and guide it along the workpiece.
The main difference is the scale.
Because a rotary tool removes relatively small amounts of material, it offers excellent control for delicate operations.
Where Rotary Tool Routing Works Best
A rotary tool with a router base is particularly useful for:
- Cutting shallow grooves in small workpieces
- Adding decorative edge profiles
- Routing small recesses
- Making detailed cuts in tight spaces
- Working on musical instruments and other delicate projects
Luthiers, who build and repair stringed instruments, often use small rotary tools for precision work.
While a rotary tool won't replace a full-size router for heavy cuts, it can be a valuable addition for smaller, more detailed tasks.
2. Cut Metal, Plastic, and Other Materials
A rotary tool can also function like a miniature angle grinder.
With the appropriate cutting wheel, it can make short cuts in metal and other materials.
This is particularly useful when you need to trim a bolt, shorten a screw, or cut a small piece of hardware.
Choosing Rotary Tool Cutting Wheels
Several types of cutting wheels are available, each designed for different materials.
Bonded Abrasive Wheels
These wheels are useful for cutting thin metal parts, bolts, and other small hardware.
They're a handy option when a hacksaw would be awkward or inconvenient.
Carbide-Coated Cutting Wheels
Carbide-coated wheels can cut materials such as plywood, hardboard, and laminate.
Because a rotary tool is typically guided by hand, these wheels are best suited to relatively small cuts rather than long, straight cuts.
Diamond Cutting Wheels
Diamond-coated wheels are designed for hard materials such as thin masonry and certain concrete products.
While those materials aren't common in most woodworking projects, a diamond wheel can be useful for occasional household repairs.
Quick-Change Mandrels
Many rotary tool cutting wheels attach to a mandrel.
Some mandrels use a quick-change mechanism that makes replacing worn cutting wheels easier.
Rather than removing a small screw each time, you retract the spring-loaded collar, position the wheel, and engage the locking mechanism.
This makes it convenient to switch between cutting accessories during a project.
Safety Tip: Use only cutting wheels rated for your tool's operating speed. Secure the workpiece, wear appropriate eye and face protection, and follow the manufacturer's instructions for the wheel and guard. Avoid twisting or side-loading thin cutoff wheels, which can fracture.
3. Carve Decorative Designs with a Rotary Tool
Carving is one of my favorite applications for a rotary tool.
Traditional carving can be intimidating when you're just getting started. But a rotary tool makes it easier to remove material gradually and develop decorative shapes.
With a little practice, you can carve flowing patterns, create textures, and add details to woodworking projects.
Three Useful Rotary Tool Carving Bits
Although there are many carving bits available, I find that three basic shapes handle a wide range of tasks.
Ball-Shaped Cutter
A ball cutter creates a rounded channel.
It's useful for carving flowing designs, such as vines, and produces a smooth, organic-looking groove.
Cylinder Cutter
A cylinder-shaped cutter is useful for removing material and creating more defined corners or recesses.
It's a good choice when you want a flatter-bottomed cut or a more geometric shape.
Arrow-Shaped Cutter
An arrow-shaped cutter produces narrow, V-shaped grooves.
It works well for fine lines, outlining details, and shaping decorative contours.
These three cutters provide a good starting point for decorative carving.
As your skills develop, you can add other shapes and sizes for more specialized work.
How to Carve a Decorative Vine Pattern
A simple vine pattern is a good example of how these cutters work together.
Start by drawing the design directly on the workpiece.
Then use a ball-shaped cutter to follow the main lines.
Begin with a light pass to establish the pattern.
Once the lines are defined, make additional passes to gradually deepen the grooves.
Avoid trying to reach the full depth in a single pass.
After shaping the main channels, switch to an arrow-shaped cutter to add details.
The V-shaped cutter is particularly useful for defining the center of leaves and adding contours.
These small details give the carving a more natural appearance.
Control the Direction of the Cut
Like a router, a rotary tool can pull or push against the workpiece depending on the direction of the cut and the tool's rotation.
For detailed carving, it's important to develop a controlled approach that keeps the bit from grabbing.
Start with light passes and pay attention to how the tool responds.
Avoid forcing the cutter into the wood.
Keep the workpiece securely supported and use both hands when the operation and tool design allow.
With practice, controlling the tool becomes more natural.
Clean Up Carving Details
Rotary carving bits often leave small raised wood fibers along the edges of a cut.
These fibers can resemble burrs on a metal workpiece.
One way to remove them is with a soft abrasive rubber brush.
These brushes can remove loose fibers without significantly changing the shape of the carved details.
That makes them especially useful for cleaning up narrow grooves and intricate patterns.
4. Grind and Polish Metal with a Rotary Tool
Rotary tools are also useful for grinding, deburring, and polishing metal.
The compact size makes them especially convenient for small hardware and areas that are difficult to reach with larger tools.
Grinding Stones for Metalworking
Rotary tool grinding stones are available in a variety of shapes, including cones, cylinders, and discs.
Two common abrasive materials are silicon carbide and aluminum oxide.
Silicon Carbide
Silicon carbide grinding stones are commonly used for nonferrous metals and other hard materials.
Aluminum Oxide
Aluminum oxide grinding stones are commonly used for grinding iron and steel.
These accessories are useful for deburring small metal parts, smoothing rough edges, and performing light shaping operations.
Always choose an abrasive rated for the material and task.
Remove Rust and Polish Hardware
Wire brushes are another useful rotary tool accessory.
They're available in several shapes, including wheels and cups, and in materials such as steel, brass, and nylon.
Steel brushes work well for removing rust from suitable metal surfaces.
Brass and nylon brushes can be useful for removing dirt, paint, or other buildup when a less aggressive approach is needed.
These brushes are especially handy when restoring small hardware or cleaning metal parts before assembly.
Shop Tip: Test the brush on an inconspicuous area first. Even softer brushes can scratch certain metals or finishes.
5. Sand Small Parts and Hard-to-Reach Areas
Sanding is another task where a rotary tool's small size comes in handy.
Although it isn't the best choice for sanding large surfaces, a rotary tool excels at working on small areas and unusual shapes.
Sanding Drums
Sanding drums consist of a cylindrical attachment covered with an abrasive sleeve.
They're useful for smoothing curved surfaces, refining profiles, and enlarging or cleaning up holes.
For example, a sanding drum can be used to carefully adjust the fit of a dowel hole.
The small diameter allows you to work in areas that would be difficult to reach with a conventional sander.
Sanding Discs
Small sanding discs are useful for refining carved surfaces and smoothing tight contours.
Their flexibility makes them particularly effective for working across the crests and valleys of decorative carvings.
The key is to use a light touch.
Because rotary tools operate at high speeds, it's easy to remove more material than intended.
Start with a suitable speed and abrasive grit, and check your progress frequently.
Choosing the Right Rotary Tool Accessory
The versatility of a rotary tool comes from its interchangeable bits and attachments.
Here's a quick guide to matching common accessories with workshop tasks.
- Small Router Bits: Grooves, recesses, and decorative profiles
- Abrasive Cutting Wheels: Cutting small metal parts and bolts
- Carbide-Coated Wheels: Small cuts in plywood, hardboard, and laminate
- Diamond Wheels: Cutting suitable masonry materials
- Ball Carving Bits: Rounded grooves and flowing designs
- Cylinder Carving Bits: Shaping recesses and defined contours
- Arrow Carving Bits: Fine lines, V-grooves, and decorative details
- Grinding Stones: Deburring and shaping metal
- Wire Brushes: Cleaning and polishing metal
- Sanding Drums and Discs: Smoothing curves, holes, and detailed surfaces
Before installing any accessory, verify that its shank fits the tool's collet and that its speed rating and intended material match the operation.
A Small Tool with Plenty of Uses
A rotary tool may not have the power of a full-size router or angle grinder, but that's not really its purpose.
Its greatest strength is control.
Whether you're routing a small recess, carving a decorative pattern, trimming a bolt, polishing hardware, or sanding a difficult-to-reach surface, a rotary tool can make the job easier.
And because it handles so many different tasks, it's an especially useful addition to a smaller woodworking shop.
If you already have a rotary tool tucked away in a drawer, it may be time to take another look at what it can do.
Chip Carving for Beginners: Tools, Techniques & Tips
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LEARN CHIP CARVING → Discover the Art of Chip Carving
