26.12.2020  Author: admin   Small Diy Wood Projects
I would like to see some editorial on woodwork joints pdf unlock woodowrk as well. A dado joint is very handy where you want to join an edge into the middle of another piece of wood, for example a bookshelf into the frame. Thanks Paul-Woodworkers Guild of America. Cabinet construction typically consists of dados, biscuits, rabbets, and pocket hole joinery. The joint relies on glue to hold together.

However, if you have large gobs of glue squeezing out, trying to wipe it away can result in spreading the glue over more of the surface area that you are trying to protect. A better choice may be to let the glue dry until it begins to darken in color, then trim it away with a sharp chisel. Gluing is so fundamental that it is an essential element of every other form of joinery that we are going to discuss. The wonder of great joinery is that two pieces of wood seem to be held tightly together by an unseen force.

In reality the force is very tangible — you just have to know where to look. Pocket screws are a great way to hide the force. A pocket screw is inserted at a sharp angle into one side of a piece of wood so that it will project out the grain end of that piece and into the piece to which it is being joined.

But fear not! The kit comes with a jig for drilling perfect pocket holes, along with the drill to do it, a sampling of pocket screws and the special square-tipped driver to tighten them. Remove the jig, apply a thin sheen of glue to the two edges being joined, insert the pocket screws into the holes and drive them tight. Wipe away the excess glue and let it dry. You can even take things a step further by gluing angle-cut dowel pieces into the pocket holes and sanding them smooth with the surface of the wood.

You just created a very strong joint with invisible screws. Or, in the case of the example below, you can use the dowels to create interesting offsets. When glue is applied to the biscuits, they swell up from the moisture and along with the glue form a very firm, strong bond between the pieces with no visible attachment from any angle. Biscuit joints are perfect for fine cabinetry work and edge-to-edge joinery where the desire is to completely hide any hint of joinery technique.

A table top made of multiple pieces of wood joined side-by-side is a perfect example of where biscuits would be used. The trick is that the slots cut into the two faces to be joined must be perfect.

So perfect, in fact, that there is a special tool called a biscuit joiner sometimes called a plate joiner designed just for making these edge cuts. Put four pieces of equal length together with four mitered corners, and you have a square. This is the fundamental shape of all woodworking except lathe work, which is a woodworking art form all of its own.

The miter joint is a beautiful joint. It allows the grain of two pieces to create a symmetry that is very pleasing to the eye.

It is, however, not the strongest of joints. While it does provide a wider gluing surface than a straight butt joint, a miter cut usually needs some help.

Biscuits or pocket screws can be employed to help strengthen a miter cut. It is also necessary to be sure the mitered surfaces fit perfectly together. Since the mitered joint is a true design element, it means the alignment of the edges must be flawless.

A dado joint is very handy where you want to join an edge into the middle of another piece of wood, for example a bookshelf into the frame. There are two basic ways to create the dado groove. The first is by using a table saw and a blade set known as a stacked dado head cutter. The other method is to use a router and straightedge or specially designed router jig to create the dado groove.

Be careful as you do this because running your router at too high a speed can result in burning the wood. Whichever method you use to cut the dado groove, remember not to cut too deeply into the stock. A general rule of thumb would be to cut a dado no deeper than one-third the thickness of the pieces you are cutting. Any more than that can lead to structural weakness. They had to figure out how to permanently join two pieces of wood together without any hardware.

The mortise is a cavity cut into a piece of wood, and the tenon is the end of the adjoining piece that is cut down in size to fit snugly inside — with glue, of course. There are varieties of mortise and tenon joints that employ wedges and other methods of securing the joint as well. It provides good strength in compression and is moderately resistant to racking. A mechanical fastener or pin is required. You use corner bridles to join frame pieces when the frame is shaped.

You can remove material from the joined pieces after assembly without sacrificing joint integrity. A variation of the bridle joint is the T-bridle, which joins the end of one piece to the middle of another. Related video: Finishing a Bridle Joint on a Bandsaw.

Dado joinery A dado is a slot cut into the surface of a piece of wood. When viewed in cross-section, a dado has three sides. You cut a dado perpendicular to the grain. It is different from a groove, which you cut parallel to the grain. A through dado passes all the way through the surface and its ends are open. A stopped dado has one or both of the ends stop before the dado meets the edge of the surface. You use dadoes to attach shelves to a bookcase carcass.

You rabbet the shelves to fit the dado, which makes the rabbet and dado joint. A good use for woodworking joints. Dovetail Wood Joint The dovetail joint, or simply dovetail, is a strong woodworking joint. It is great for tensile strength resistance from pulling apart. You use the dovetail joint to connect the sides of a drawer to the front. A series of pins cut to extend from the end of one board interlock with a series of tails cut into the end of another board.

The pins and tails have a trapezoidal shape. Once glued, the joint is permanent, and requires no mechanical fasteners.

Some people use a dovetailed dado, because of the tensile strength. Finger Joint A finger joint or box joint is one of the popular woodworking joints. You use it to join two pieces of wood at right angles to each other.

It is much like a dovetail joint except that the pins are square and not angled. The joint relies on glue to hold together. It does not have the mechanical strength of a dovetail. The woodworking joint is relatively easy to make if you know how to use a table saw or a wood router with a simple jig. Lap Wood Joint A half lap joint is one of the frequently used woodworking joints. In a half lap joint, you remove material from each piece so that the resulting joint is the thickness of the thickest piece.

Most frequently in half lap joints, the pieces are of the same thickness. You remove half the thickness of each. This joint is good for making workshop storage items. Mortise and Tenon Woodworking Joints One of the strongest woodworking joints is the mortise and tenon joint. This joint is simple and strong. Woodworkers have used it for many years. Normally you use it to join two pieces of wood at degrees.

You insert one end of a piece into a hole in the other piece. You call the end of the first piece a tenon. You call the hole in the second piece a mortise. Normally, you use glue to make this joint. You may pin or wedge it to lock in place.

A quality mortise and tenon joint gives perfect registration of the two pieces. This is important when building heirloom pieces. A mortise is a cavity cut into a piece of wood to receive a tenon. A tenon is a projection on the end of a piece of wood to insert into a mortise.

Usually the tenon is taller than it is wide. Generally, the size of the mortise and tenon relates to the thickness of the pieces. There is more detail of this superior joint on Woodworking Jigs near the middle of the page. You will find a video of each jig in action to show how precise you can make this joint. It is nothing more than a Butt joint with Pocket Hole Screws.

The pocket holes require two drilling operations. The first is to counterbore the pocket hole itself, which takes the screw head contained by the piece. The second step is to drill a pilot hole whose centerline is the same as the pocket hole. The pilot hole allows the screw to pass through one piece and into the adjoining piece. You use two different sized drill bits for this operation. Alternatively, you may find special stepped bits to perform this operation in a single pass.

Most people use a pocket-hole jig, such as the Kreg Jig. This jig allows you to drill pocket holes at the correct angle and to the correct depth. You should use glue to strengthen the joint. Moreover, the mortise and tenon joint is much stronger. Rabbet Woodworking Joints A rabbet is a recess cut into the edge of a piece of wood. When viewed in cross-section, a rabbet is two-sided and open to the end of the surface.

An example of the use of a rabbet is in the back edge of a cabinet. The rabbet allows the back to fit flush with the sides. Another example is the insertion of a glass pane by using a rabbet around the edge of the frame.

Tongue and Groove Woodworking Joints One of the more popular woodworking joints is the edge-to-edge joint, called tongue and groove. One piece has a slot groove cut all along one edge. The other piece has a tongue cut on the mating edge. As a result, two or more pieces fit together closely. You can use it to make wide tabletops out of solid wood. Some other uses are in wood flooring, parquetry, paneling, etc. You can cut the tongue and groove in a number of ways. I discuss a superior way to make this joint on the How to Use a Router Table page.

Which of the woodworking joints give the most strength? Do screw add any strength to a joint? This article contributed by Jim McCleary, editor of www. Click here to cancel reply. With all the new style joinery bits now coming out on the market, I would like to see an article involving their use and or practicality. Otherwise, very good article. Genuinely need to know weather im wasting my time or not. Many Thanks Maxine.

I read that article and if I remember correctly the box joint not finger joint exceeded them all in strength. Hi Dave. Yes, there are many applications for dovetail joints. They can be used any time that end grain is joined to end grain. I use commonly dovetails for blanket chests, magazine racks, boxes, etc.

This guide on wood joinery is very helpful and I was glad to see it. Thanx for your publications. Check this link. It suggests that your conclusions may not be correct. Mortise and tenons joints fail when the cross-grain side of the joint splits at the depth of the tenon. Lap joints are stronger since they are held by the full width of both pieces. I was considering using Dovetails Two Large pins in the legs and the top will be my tail board?

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