Assembling workbenches in the old-school manner is a nail-biter.
If the drawbores are too close together, then you drive the peg in and nothing happens. The tenon isn’t pulled into the mortise. You start looking around for your framing nailer.
If the drawbores are too far apart, you drive the peg in and it explodes when it hits the tenon.
Either way, after days of work, your bench is in peril.
When the drawbores are just right, then the joint comes together beautifully. The peg is hard to move, but it moves. And the sound is different when you pound the head of the peg. With a bench like this one, made of Douglas Fir with 2-1/4”-thick tenons, we are using about a 3/16” offset between the tenons.
The 1/2” oak pegs are made from firewood that was sitting out by the firepit at the Marc Adams School of Woodworking. We sawed it to length on the band saw, then rived the pieces with a froe and ran them through a dowel plate.
We cut a pencil-shaped point on each peg using a chisel. Then lubed them up with paraffin (this is a timber-framer’s trick). And then drove them home.
We got the first bench together with only minor problems – one exploded peg. The student wanted to use glue – I couldn’t convince him otherwise. We’re just about to assemble the second bench. He wants to use glue, too.
I need to get more convincing that you don’t need the glue. Maybe I should put on a low-cut dress.
— Christopher Schwarz
I am a believer Chris. I’m working on a table and the only glue planned is joining the boards for the top.
I’m gonna have nightmares of that image. And pleeease no pantyhose!
Pink tube top not withstanding, some folk just need “insurance” against the boogie-man. My bench is not a Roubo but it does have wedged through tenons and NO glue. It’s been together for ten years and shows no sign of loosening.
Do we want to know how Megan KNOWS about your pink tube top? Was there a dress code at PWW?
Oh…and to stay on topic…glue them, but check out Bob Lang’s article in the online extras of the new PWW Magazine about how to APPLY the glue to the tenons. (How was that….got back on topic AND plugged the new issue. I could totally work for F&W!)
With a bench like this one, made of Douglas Fir with 2-1/4”-thick tenons, we are using about a 3/16” offset between the tenons.
Do you really mean a 3/16″ between the drawbores? Otherwise, I don’t understand.
Clearly, you should have packed your pink tube top.