Are Biscuit Joiners Useful?


A Complete Guide to Biscuit Joiners and How They’re Changing Woodworking

Introduction: What is a Biscuit Joiner, How Does it Help in Woodworking and Why do you need one?

Biscuit joiners are a woodworking tool that helps you to make precise joints in your wood. It does this by using a special type of cutter called a biscuit jointer. You can use it for all sorts of projects, such as furniture making, cabinet making, and even door hinges.

The biscuit jointer is used for joining two pieces of wood together to make an invisible joint for dinner tables or uprights to a bookcase. They’re not just limited to these projects though. The biscuits themselves can be used in various ways to create different types of joints and connections. This article will outline the various uses for biscuit joints and where they can be used.

Are Biscuit Joints Necessary?

Are biscuit joints Necessary? That depends on the type of project. I like the idea of using them for putting together long boards and they’re completely invisible. Biscuit joints are the most common type of woodworking joints and can be used in any orientation.

A biscuit joint is made by cutting a notch into the edge of two boards that are to be joined together. The next step is to take a thin wafer looking piece of wood called a biscuit and put one in each slot that you cut with the biscuit jointer.

The biscuits and mating edges of the boards are glued together to form a strong bond that can be reinforced with screws or nails. The biscuits should fit tightly in their notches so they don’t move around during glue-up. If they don’t fit tightly, it’s possible for them to pop out of place when placing clamps perpendicular to the joint.

Are Biscuit Joiners Worth The Money

Biscuit joiners are a great tool to have in your woodworking shop. They make quick work of assembling long joints together. Especially when you have a bunch of them. Biscuit joiners are often used as an alternative to a mortise and tenon joint where strength isn’t a concern.

If you make furniture or other larger items that incorporate many pieces of wood then this is the tool you’ll want to have. It’s also important to know what you will use the biscuit joiner for before you buy one. If you’re making a bunch of joints that require strength such as shelving of any kind, then the biscuit joiner won’t be the tool that you need for this application. A pocket hole joint might be a better solution for those kinds of things.

Gluing Biscuit Joints

Before you attempt to glue the joints, you want to make sure that you have the right type of wood glue. I recommend using a water based wood glue. The water in the glue will help to swell the biscuits inside the slots that you made with the biscuit joiner. When you get ready to apply the glue, only put it in the slots and not on the biscuits themselves.

You can spread the glue evenly in slots with the use of a popsicle stick or something else that will fit. Then all you have to do is assemble the pieces together and use wood clamps to clamp everything together.

What are the Benefits of A Biscuit Joiner?

One of the main benefits of a biscuit joiner is that it allows you to cut a slot into the edge of two pieces and then drive a thin strip of wood called a biscuit into the slot, creating a more level joint and seam all the way down the boards that are to be connected together.

Biscuits are available in different widths and diameters to accommodate the thickness of your boards. If you are making a small project like a bookcase, it is an efficient choice to use the biscuit joiner for the upright part of the case. It’s quick, easy to use and gives a clean surface when assembled.

Some of the other benefits of a biscuit joiner are as follows:

-It saves time

-It saves money

-It is more accurate than other methods

-It cuts the risk for mistakes during assembly

-It creates cleaner joints and seams than other methods

Are Biscuit Joints Strong?

People have a love hate relationship when it comes to biscuit joints. They make putting things together easier and accurately. That’s the love part of the relationship. The hate part of the relationship is that they don’t add much strength if any even when the boards are glued together.

It makes sense if you think about it, the only thing that’s between the joints of wood is a very thin piece of wood holding everything together. When weight is applied to a shelf that’s made with biscuit joints, all the stress is on the biscuits themselves and not the shelf. If too much weight is added then the biscuit could break.

Types of Wood Biscuits and their Uses in Woodworking Projects

They’re thin, long oval shaped pieces of wood that are glued into the slots made by the biscuit joiner to form a solid, stable joint.

Wood biscuits can be used in various ways and for various purposes. They can be used as an alternative to dowels and pocket holes, when joining the edges of two boards together. But they also provide stability to joints that have been cut on the table saw or other power saws when using thinner stock pieces for the joint. 

What Biscuit Size should I use for my Woodworking Project?

Biscuits come in three sizes: 0, 10 and 20. The size of the biscuit is determined by the thickness of the materials that it will be used on. The size 0 biscuit is for thin materials like plywood or veneers while the size 20 biscuit is for thicker materials like hardwoods.

The 10-size is a general-purpose size that can be used on most types of wood with a thickness between 3/8″ and 1″. As a general rule, biscuits are made of two types of wood shims. The shims are typically narrower at the middle than on either side. The point at which the two sides meet is called the biscuit step or bevel and is usually around 1/8″ inch to 3/16″ inch wide.

How to Use a Biscuit Joiner Machine Correctly

A biscuit joiner is used to join two pieces of wood together by cutting slots at exactly the same depth on all boards that are to be connected together. This ensures that when both edges of wood are put together, there won’t be any unevenness across the boards. The slots are cut so that they are slightly wider than the width of the biscuit and are on opposite sides of the boards. A biscuit is then inserted into each slot, and the boards can be glued and clamped together.

The steps on how to use a biscuit joiner are as follows:

  1. Put the edges of the boards together as if you were going to join them.
  2. Take a tape measure and mark across both boards where you want the slots to be cut.
  3. Set the desired depth on the biscuit jointer.
  4. Put the plate on top of the board and align the notch with the mark that you made.
  5. From here it’s just a matter of squeezing the trigger and pushing the biscuit joiner forward to make the cut.  Do this with all the marks you made on the edges to be put together.
Biscuit Joiner, A Must Have Tool

How to Know When It’s Time for Replacement Blades on the Biscuits Joiner

Biscuit joiners are versatile tools in a woodworker’s arsenal and they come in handy for a variety of tasks. From cutting slots to creating grooves and matching boards together, the right biscuit joiner can make quick work of all those tedious tasks.

Unfortunately the blades on your biscuit joiners wear out with use and should be replaced periodically. If the blade isn’t cutting through the wood smoothly or the biscuit jointer seems to struggle with cutting, it’s a good sign that it is time to replace the blade.

You can try your hand at sharpening the blade of your biscuit joiners but it’s more cost and time effective to buy a new set of blades. Also keep in mind that an overly stressed blade could break apart and damage you or your surroundings.

What are the Reasons Why Biscuit Joints Break?

Even though biscuit joints are strong, flexible, and can be used for different types of projects, they do have some flaws.

The problem is that biscuit joints sometimes break off when they are being assembled. This can happen because the wood has dried out so much that it makes the biscuit too brittle, or the biscuits have been made too thin or too thick. Some of this can be due to the climate that you live in. For example, humidity swells wood which makes the biscuit to thick. If the biscuit is too thick when you go to put it into the slot made by the biscuit jointer, you run the risk of it breaking off in the slot.

Maybe you live in a climate that’s pretty dry. This causes the biscuit to shrink in thickness which will result in a loose and sloppy fit.

So fixing these two problems is pretty simple. If the biscuit is too thick, try putting several at a time in a microwave for about 30 seconds and see if they shrink to the desired thickness.

If the biscuits are a little too thin, put a few in a bowl of water for a few minutes to see if they swell up to fill the slot made by the biscuit joiner. With both solutions, you want a snug fit for the biscuit joint before glue up

What are the most common problems with a biscuit joint?

Loose fit: The biscuit joint is not tight enough and can be pulled apart with a little force.

Gaps: The biscuit joint is too short, leaving gaps between the biscuits.

Conclusion: The Best Ways to Maximize Your Woodworking Projects by Utilizing A Biscuit Joiner


The best way to maximize your woodworking projects is by utilizing a biscuit joiner. It’s a tool that will help you with the accuracy and precision needed for anything that may require a biscuit joint. This type of power saw has a circular blade and a fence, which helps guide the blade for cutting out slots for the biscuits. The slots are cut at an angle, so that when the biscuits are laid in place and glued together, they will form a strong joint without any gaps between them.


Learn how to use a biscuit joiner.