how to chisel a round mortise

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If you’re looking for a new way to add some character to your furniture, look no further than the art of chiseling. In this tutorial, we’ll show you how to make a simple round mortise using a jigsaw and a bit of patience. So get your tools ready and let’s get started!


There are a few different ways to chisel a round mortise. The most common and straightforward method is to use a Forstner bit. This method is perfectly fine for most applications, but there are a couple of drawbacks. First, the Forstner bit will only drill as deep as its diameter. So if you need to drill a deeper hole, you’ll need to use a larger bit. Second, theForstner bit will leave a smooth surface on the inside of the mortise which may not be ideal for some applications.

Another common method is to use an auger bit. Auger bits have spiraled flutes that allow them to drill deeper holes than Forstner bits while still maintaining a fairly smooth surface on the inside of the mortise. The main drawback of this method is that it can be difficult to control the depth of the auger bit, so it’s possible to accidentally drill too deep and ruin your piece.

The third and final method is to use two straight bits (one slightly smaller than the other). This method will give you more control over the depth of your mortise while still leaving a reasonably smooth surface on the inside. However, it’s important to note that this method requires more skill and experience than either of the previous methods since it’s easy to make mistakes when drilling with two straight bits.

Tools and Materials

-A chisel
-A mallet or hammer
-A round mortise
-A sharpening stone

Assuming you have a chisel and a mallet or hammer, the next thing you’ll need is a round mortise. You can find these at most hardware stores. Once you have your mortise, the first step is to sharpen your chisel. Run the chisel along the sharpening stone until it’s nice and sharp.

Now that your tools are ready, it’s time to start carving out that mortise! First, use your chisel to make a series of shallow cuts around the perimeter of the mortise. Be careful not to go too deep – you don’t want to damage the surrounding wood. Once you’ve made those initial cuts, it’s time to start deepening them until themortise is complete. Keep going until your chisel hits bottom – then give the sides of the mortise a quick once-over with your sharpening stone to clean up any rough edges. And that’s it – you’re done!

Marking the Workpiece

Before beginning to chisel a round mortise, it is necessary to first mark out the workpiece. This can be done using a sharp pencil and a straight edge. First, draw a line around the outside of the mortise using the pencil and straight edge. Then, use a compass to draw two arcs inside the mortise, one at each end. These arcs should intersect at the center of the mortise. Finally, use the pencil and straight edge to draw a line connecting the ends of the arcs. This will give you a perfect guide for chiselling out your mortise.

Drilling the Pilot Holes

When it comes to drilling pilot holes, there are a few things you need to keep in mind. First, you want to make sure that the bit is the same size as the dowel being used. Second, you’ll want to use a drill press if possible so that the hole is drilled perpendicular to the surface. If you don’t have a drill press, you can use a hand held drill, but be extra careful to keep it level.

To start, clamp the piece of wood that will be receiving the mortise onto the drill press table. Then, using a Forstner or brad point bit (again, make sure it’s the same size as the dowel), drill into each corner of where the mortise will go. Stop drilling when your bit reaches about half way through the thickness of the wood.

Now it’s time to chisel out the mortise itself. Start by putting your chisel into one of the pilot holes and give it a sharp tap with a mallet to get it started. Then begin working around the perimeter of all four sides ofthe mortise until you’ve reached your desired depth. Be sure to frequently check your progress by insertingthe dowel – you don’t want to make your mortise too deep!

Chiselling Out the Mortise

A mortise is a hole cut into wood, and chiselling out a round mortise is a bit more tricky than your standard square or rectangular hole. Here’s how to do it:

1. First, you’ll need to mark out the outline of the mortise with a pencil. Make sure to leave enough room around the edges for the chisel to fit.

2. Next, use a small handheld drill to create pilot holes at each corner of the mortise. These will help guide your chisel as you start carving out the shape.

3. Now it’s time to start chiselling! Begin at one of the pilot holes and work your way around the perimeter of the mortise, using short strokes and keeping the chisel perpendicular to the wood surface. Be careful not to apply too much pressure, or you might split the wood.

4. Once you’ve reached all four corners, use a wider chisel (or even a router) to remove any remaining material in the middle of the mortise until it’s completely clear all around. This final step will give you nice clean sides and prevent any potential splintering later on.

Cleaning Up the Mortise

A mortise is a hole cut into a piece of wood, and it’s usually rectangular or square in shape. If you’re cutting a round mortise, there are a few extra steps involved. Here’s how to do it:

1. First, mark out the location of the mortise with pencil lines. Make sure the lines are level and perpendicular to the surface of the wood.

2. Next, use a drill to create pilot holes at each corner of the mortise. These holes will help guide your chisel as you cut out the mortise.

3. Start chiseling out the mortise from one of the pilot holes. Work slowly and carefully, angling the chisel towards the center of the hole as you go. As you get closer to finishing, be careful not to make the sides of the mortise too thin – otherwise, they might collapse when you try to insert a tenon into them later on.

4. Once you’ve finished chiseling out the mortise, use a file or rasp to smooth out any rough edges inside it. This will make it easier for the tenon to fit into place later on

Finishing Up

When it comes to finishing up a round mortise, there are a few different approaches that you can take. The first and most important thing to keep in mind is that you want to avoid creating any sharp corners or edges. This will help to ensure that the finished product looks clean and professional.

One approach is to use a router with a flush trim bit. This will allow you to create a smooth, even edge all the way around the mortise. Another option is to use a chisel and mallet to carefully remove any excess material. This method requires a bit more patience and care, but can produce excellent results if done correctly.

Whichever method you choose, take your time and work slowly and carefully. Once you’re happy with the results, apply your finish of choice and enjoy your handiwork!


To chisel a round mortise, start by drilling a hole in the center of the mortise. Then, use a sharp chisel to score around the circumference of the hole. Next, use a hammer to tap the chisel around the scored line until you’ve cut through the mortise. Finally, clean up any rough edges with sandpaper or a file.


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