Cutting slots in wood is often known as mortising, and it can be done with a drill press. You'll need to set up a fence guard on your drill press table to make sure you move your board straight. Attach a Forstner bit to the drill and set up the proper plunge depth. In woodworking a slot is a channel usually made to receive another piece. It is either designed to be a tight fit to hold something together like shelving or T&G flooring, or a sliding fit to permit things to move. A little research on vocabulary will tell us that a dado is a slot cut across the grain of the wood whereas a groove is a slot cut with the grain.Wood on wood sliding fits often.
Woodworking is all about shaping wood. While there are a wide variety of ways in which we shape that wood, they can be broken down into two basic categories: cutting wood to remove parts and attaching pieces together. Within each of those two categories, there are several different ways of accomplishing most woodworking tasks.
For the most part, woodworking today is done with power tools; but that wasn’t always the case. If we go back 100 years, there were no electric power tools to use. While the sawmill goes all the way back to 1594, sawmills were few and far between. There was no chance that someone would have their own. The first handheld electric drill, the most common electric power tool there is, wasn’t invented until the late 1800s and was first only used in factories.
Today, we have a multitude of different power tools, allowing us to do a wide variety of woodworking tasks. The problem, for many of us, is that there are too many tools available for what our budget can support. We end up buying the tools we need the most and finding ways of making do for everything else.
This is why it’s valuable to know alternative ways of doing things. Those alternative ways might involve using other types of power tools to complete the task or they might be the methods that our forefathers used, working with hand tools, rather than power tools. Either way, they’re worth having in our bag of tricks.
- Several methods: 1. Use a router with a straight cutting bit that is less than or equal in diameter to the width of the groove. The router is guided by a straight board clamped to the piece being cut or by a router edge guide.
- This square slot can be done various ways, first, in the shaper using a vise with a V block, in a lathe using a simple milling attachment, in a miller using a staggered tooth saw, you cut a double depth slot then place a piece of square carbon in the slot, then.
The Rapid Cutting Router
For this article, we’re going to concentrate on alternatives for shaping which is normally done with a router. Routers are high-speed tools, in which a motor turns a bit, which sticks down through a base at 90 degrees. The height of the bit can be adjusted, as compared to the base, affecting exactly where on the workpiece the bit is cutting. A variety of bit shapes are available.
Routers can be handheld, with the base placed on the workpiece or they can be mounted upside-down in a router table, allowing the workpiece to be run across the router bit. Generally speaking, the router is used without the table for larger workpieces and mounted to a table for smaller ones. Some woodworkers have two routers, allowing them to leave one mounted to their router table.
A router is a handy tool to have, being used for cutting grooves (properly called rabbeting), cutting slots in boards, such as for hanging them, trimming the edge of laminate, and cutting various types of tongue and groove joints for putting pieces together. They are also used for rounding or chamfering the edges of tabletops, as well as cutting molding edges directly into those edges.
Alternative Ways to Cut Grooves (Rabbeting)
Rabbeting means to cut a groove in a board. This groove might be in the edge of the board, which is a useful way of connecting boards at corners or it might be in the middle, such as for a drawer slide. In either case, the most common tool for cutting these grooves is the router. But what do you do if you don’t have a router available to cut a groove in your workpiece?
Regardless of which method you’re going to use to cut the rabbet, you’re always going to want to start by marking exactly where you’d like to make a channel. The old rule of “measure twice, cut once” applies just as well here, as it does anywhere else. Be sure to use a straight-edge when marking to cut a straight line, not just a convenient board. It’s amazing how many boards come from the sawmill with edges you can’t count on.
Table Saw Method
Typically, grooves cut into wood on a table saw are cut using a dado blade. There are several types of these, including one where the blade wobbles side to side, cutting out the groove and one which is essentially a stack of blades. Both types can be adjusted for the width of groove that is wanted and both work, although the surface finish provided by the wobbling blade style is not as good as that provided by the stack of blades.
When cutting a dado or rabbet on a table saw, always make a test cut, as both the width and depth of these cuts can turn out to be different than what you expect. You should also measure the distance between the edge of the saw blade and your fence with a tape measure, as the built-in gauge for your fence will not be accurate with these blades installed.
If you don’t have a dado blade for cutting grooves, you can still cut them on a table saw, using the standard blade. For most table saw blades, the kerf (width of cut made by the blade) is 1/8”, although there are some “narrow kerf” blades which only cut out a tenth of an inch.
To make a wider than 1/8” groove in the wood, all that you need to do is make a series of cuts which overlap each other, moving the workpiece between each cut. If your groove travels the length of the workpiece, this can be accomplished by moving the table saw’s table. If it runs across the width of the board, you’ll need to use the miter gauge, moving the workpiece slightly between cuts.
Always make a test cut to double check the depth your blade is cutting, whenever making a cut on a table saw that does not go all the way through the board. While you should be able to measure the height of the highest tooth off the table and determine this, that measurement usually isn’t accurate enough.
Dremel Tool Method
You can cut a channel in wood with a Dremel tool or similar tool; however it is nearly impossible to get a clean cut in this manner. You can improve how clean the edges of your cut are by first cutting them with a utility knife. This will also help to prevent splintering of the edge.
Using a Dremel tool works best for short cuts, as the rotary bit on this tool is small and long cuts can be time consuming. Be sure that the bit on the tool will go to the correct depth, then get to work, following your line. You’ll finish up eventually!
Rabbeting Plane
Before the existence of routers and table saws, woodworkers made grooves in wood parts with a rabbeting plane. This can either be a wood or metal bodied plane, where the plane’s body is exactly the same width as the blade. Rabbeting planes come in a variety of different widths, up to one inch, to match the most common groove sizes used.
Rabbeting planes can be used in the middle of a board or at the edge. They can be used with the grain or for crosscutting. The major difference between crosscutting and cutting with the grain, is that you need to make sure that you use a thinner depth of cut for a crosscut, than you would when cutting with the grain.
Some rabbeting planes come with a fence, which allows you to set the width of a rabbet, when making the rabbet at the edge; but most don’t. Professionals get by without a fence, by cutting a narrow groove with a sharp knife, at the edge of where they want to make their cut. This groove can then be used to guide the plane.
If you’re not that skilled, an alternative is to clamp a straight edge, metal-bodied level or straight board across the piece you are trying to cut the groove in, using it as a fence, once you get a little bit of the groove cut, you can remove the fence, as the plane will ride in its own groove.
Chisel Method
If you’re completely desperate and have no power tools, you can always cut a groove the old-fashioned way by using a chisel. This was the normal way of cutting a groove for centuries, especially for apprentice woodworkers, who didn’t have a rabbet plane to use.
As with the other methods, start out by marking where you want to cut your groove, marking both edges of the cut. Then use a back saw to cut along those lines, to the depth that you want to make your groove. Be careful on this, as it is extremely easy to get the ends of the cuts to the full depth, without getting the middle cut that deep.
With the sides of the groove cut out, it is an easy task to cut out the material in the groove with a chisel. Use a chisel that is as close to the width of the groove as possible, without going too wide. As you reach the bottom of the groove, be careful not to overcut.
How to Make Rounded and Chamfered Edges on Wood without a Router
A router is by far the best tool for modifying the edges on wood, whether that modification is creating a rounded edge, a chamfer, a beaded edge or some other type of molded edge. Many of the wide variety of router bits on the market are specifically designed for these purposes. But what do you do, if you don’t have a router available to do this type of work?
A lot depends on the kind of edge you’re trying to make. Obviously, some are more difficult to accomplish than others. Much of this involves using various types of wood planes. But before routers, planes were one of the woodworker’s top tools. Most would have a large number of planes, many of which they had made themselves and each of which had a specific purpose.
Rounding and Chamfering with a Plane
If you have a standard wood plane, what’s known as a “Jack plane” or “bench plane,” rounding and chamfering edges is easy. All you have to do is to run the plane down the corner of the board a number of times, until you get the edge you want. For a chamfer, you’ll need to hold that plane at a consistent 45 degree angle for all the strokes and to round it; you’ll want to vary the angle. To finish off the rounded edge, sand out the flats created by planning.
Always use a plane following the direction of the grain, when planning the long edge of a board. You want the grain moving up and towards the edge, as it moves away from you. Otherwise, the plane’s blade can catch in the grain, tearing out chunks of the wood, rather than shaping it the way you want.
For rounding and chamfering the ends of the board, where you are cutting across the grain, you’ll want to use a block plane, rather than the planes mentioned earlier. These are smaller planes, but the important difference is that the blade is set at a 35 degree angle to the surface, making it easier for them to cut across the grain. Always ensure that the blade is sharp, so that it will cut through the grain.
Rounding Edges with a Sander
Another option, which allows you to use a power tool, rather than working with hand tools, is to use a vibratory or random orbital sander. This will not provide you with as clean and crisp a rounded edge; but rather, an edge which looks worn, especially at the corners. Work one edge at a time, gradually removing wood, until you have created a rounded profile that looks good to you. It’s tough to be precise with this, but the finished results are visually interesting and perfect for rustic furniture and woodwork.
Of course, the same thing can be done sanding the wood by hand, although it is much more work.
Using Molding Planes
A moment ago I mentioned that carpenters and cabinet makers used to use molding planes to cut profiles in the edges of wood, before the router was invented. These planes were used for both creating fancy edges on the wood of cabinetry and furniture and to make architectural molding. Each particular profile the woodworker would want to cut required its own special plane.
The shoe of these planes would look like a mold of the profile to be cut and the blade would be ground, filed and sharpened to match that profile. In a carpentry or cabinet making shop, they will make their planes off a “mother plane” which is the reverse of what they are trying to create. The mother plane would cut the profile into the shoe of the planes they would use, then they would grind the blade to match that shoe.
You can find these molding planes for a very reasonable price in many antique shops. While they might need some cleaning up and sharpening, most are in fairly reasonable condition. Just make sure that the shoe of the plane isn’t split or have missing pieces and that the blade matches the contour of the shoe. They sometimes get mixed up.
Molding planes are used just about like you’re trying to plane the edge of the board, with the exception that they will make a contour, rather than making the edge of the board flat and smooth.
Molding with a Scratch Stock
A simple tool, called the scratch stock, was used in cabinet shops, when only a small amount of a particular molded edge was needed, such as a triple beaded edge for the top of a dresser. This tool consisted of a clamp to hold the blade, with a lip to align it with the edge of the board to be molded. There was no shaped shoe, like on a molding plane.
Blades for the scratch stock were usually ground from pieces of old, broken bandsaw blades. In the photo above, the author used a broken sawzall blade for the scratch stock. The working end of this blade is not visible in the photo, as it sticks out underneath the tool, but it is ground to provide a triple bead on the edge of a board. The end sticking up has been ground to provide a different profile. All that would be needed to use that end would be to reverse it in the tool handle.
How to Cut a Slot in Wood
Another task that is often done with a router is cutting slots. This differs from cutting a groove in that the slot does not go the full width of the board. Different types of slots are cut for different purposes. There are a few ways to cut a slot in wood without a router. The method you choose depends on the type of slot you’d like to make, as well as on the tools you happen to have on hand.
Keyhole Slot
Keyhole slots are used typically for hanging finished work on the wall. There will be an opening for the head of a screw to go through, along with a slot that is small enough that the screw head cannot pass through it. Keyhole slots can either be cut all the way through a board forming the back of the project or cut into it, depending on the thickness of the board.
These slots are normally cut with a special bit on a router, using a fence, with the router mounted in a router table, to keep the slot straight. But they were in use long before the router or the router table were invented.
Start by marking a line, showing where the slot is going to go and which end the larger hole is on. Drill the clearance hole that the screw head has to pass through at the appropriate end of the line. This is normally about 1/32” larger than the diameter of the screw head. Then drill a hole the same diameter as the slot, at the other end of your line. This is normally 1/32” wider than the screw threads, what’s referred to as the “major diameter” of the screw.
Draw two parallel lines, the width of the smaller hole, from that hole to the larger hole, ensuring that they are centered on the larger hole. Cut the material between the two holes with a keyhole saw. This is a small saw, with a very narrow blade and a point on the end.
Another way of cutting out that material is to drill a series of holes, following the line, with the smaller size drill bit. Then, cut out the remaining material with a small chisel.
Cutting Slots in Wood with a Jigsaw
If you want to cut an open slot in wood, you might find that a jigsaw does the trick. Start by drilling two holes at each end of the desired slot. You’ll need to make sure that at least one hole is large enough to accommodate the jigsaw blade. Cut the slot, working carefully and moving slowly.
Cut a Slot in Wood with a Circular Saw
It’s normally not recommended to make plunge cuts with a circular saw, for safety reasons, but many woodworkers do it anyway. It’s definitely safer to make a plunge cut with a circular saw than it is to make the same cut with a table saw. For safety, before you get started, be sure that you have a good sharp blade on your circular saw. Be sure to wear the proper eye and ear protection for this task, and clamp your wood into position before you get started. Stand to the side, not behind the saw.
Raise your blade guard and set the blade to the proper depth, just a bare fraction of an inch deeper than the depth of the wood.
Line up the blade with your guide line. Tip your saw up and activate the blade. Once it’s at full speed, double-check to ensure that you’re still over your guide line. Plunge your blade slowly into the wood, release your guard, and then make your cut. It’s a very good idea to practice this technique on scrap wood before moving on to anything important.
Related Posts:
Miters are not the strongest joints, but we use them all the time for joining picture frames together. One method for strengthening this connection is to add a spline, a thin sliver of wood into a slot where the two miters join together. A common way to make these is to cut a slot about halfway through the corner after gluing the frame together and slide in the spline.
Standard spline that goes halfway through the miter.
A better method for making splines
In this method, the picture frame and the splines are glued up all at the same time. These splines are stronger because they run all the way through the width of the miter and the grain is positioned to run perpendicular to the miter.
How To Make Square Slot In Wood Lathe
Making the slot-cutting jig is simple. It’s basically the opposite of my regular spline jig.
Regular slot cutting jig (left) and alternative jig.
Making the slot-cutting jig
Glue together two scraps of plywood. One a little taller than your rip fence, and the other piece square. I added a couple screws so I wouldn’t have to wait for the glue to dry.
Next, square this assembly up by cutting off the bottom triangle of the square, shaving off a little of the rectangle at the same time.
It should stand square to the table top and fence.
Using the jig
After cutting your picture frame pieces with their 45 degree miters. Line up one end with the triangle so that the end is flush with the table. To keep this from slipping, clamp the board to the upper part of the jig and cut out a slot.
To make the slot on the opposite end, keep the same side toward the fence and cut the slot using the other side of the triangle.
Making the splines
The grain direction of these splines if what helps give these miters their strength, You want the grain to be running perpendicular to the miters, not the same direction. To make these, select a board that is wider than the length of the miter joint.
How To Make Square Slot In Wood Floors
Then resaw a board to the thickness of your slots.
Then crosscut this thin board into the widths of your miter slots. I used a thicker board to hold down the thin splines and keep them from flying away when I cut them
How To Make Square Slot In Wood Dowels
Gluing up
How To Make Square Slot In Wooden
The nice thing about these splines is that they help with the corner alignment of the picture frame and prevent them from sliding apart. Glue them into the slots and glue the miters together all at one. One the glue is dry, cut off the excess and sane the frames smooth.