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What is Drawbored?
What is drawboring? It’s a technique that greatly strengthens a mortise-and-tenon joint, transforming it from a joint that relies on glue adhesion into a joint that has a permanent and mechanical interlock. In essence, you bore a hole through both walls of your mortise.
How tight should tenons be?
The tenon should be a snug fit into the mortise, to the point that a few gentle taps from a rubber mallet is needed to disassemble a dry fit. BTW – A couple of tips. Don’t put glue on the tenon but rather in the mortise. Make the mortise deeper than the tenon.
When would you use a mortise and tenon joint?
Mortise-and-tenon joints are among the strongest joints in woodworking, and are used for projects that have frame construction and need to be strong. Chairs and tables use them as does most Arts and Crafts and Mission style furniture.
Can you mortise with a drill press?
Mortising attachments are available for almost every drill press. Although they vary in appearance, they all have three basic components: a fence, a chisel holder and a hold-down. Mortising bits cut square holes. The auger bit fits inside the chisel and protrudes slightly.
What is a Drawbored mortise and tenon joint?
A drawbored mortise and tenon is one of the strongest variations of this ubiquitous joint. It gets the name because it is assembled by driving a hardwood peg through an offset hole in a mortise-and-tenon joint; as the peg engages with the offset hole, it draws the tenon deeper into the mortise.
What is a tusk tenon joint?
Also called a keyed tenon or wedged tenon, the tusk tenon is a kind of mortise and tenon joint that uses a wedge-shaped key to hold the joint together. In a common mortise and tenon joint, a protrusion on one part (the tenon) fits into a hole on the other part (the mortise).
Do you have to glue mortise and tenon joints?
You could use one of the many variations of the mortise and tenon joint, depending on the look you’re going for. Though I agree with HerrBag, that the strength of a mortise and tenon joint should not rely on glue.
Should I glue mortise and tenon joints?
The one method you should not use when gluing the mortise and tenon joint is brushing glue only on the tenon faces and inserting the tenon into the mortise. As you can see in the video, nearly all the glue will be forced out of the joint, making for very little adhesion and a real mess.
How is a drawbored mortise and tenon joint different?
A drawbored mortise & tenon joint is similar to the pegged version, only the hole in the tenon is slightly offset so that when the peg is driven home, it pulls the tenon further into the mortise. Most of the time, a joint with this much mechanical strength really doesn’t even require glue!
Where to mark the offset on mortise and tenon?
Disassemble the joint and for better visibility, use a pencil to darken the marks in the cheek of the tenon. Measure and mark the offset (the offset should be located closer to the shoulder of the tenon). How much offset depends on the wood and the application.
Can a draw bore pin hold a mortise joint together?
In fact, if you don’t want to use glue, then a draw bore pin will hold your joint perfectly well on it’s own. to hold a mortise and tenon joint together, you can drill a hole right through the assembled joint, and insert a snug fitting pin – make sense?
What do you use to glue up mortise and tenon?
When most woodworkers think of a glue up, they think of clamps. How else are you going to pull together a tight mortise-and-tenon? That’s where drawboring comes into play.