Beadlock Loose Tenon System Review
Overlapping drilled holes make a mortise; a scalloped tenon fills it. Domino joinery for the price of a drill bit.
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A loose tenon joint is two mortises and a separate tenon that bridges them. It is as strong as a traditional mortise and tenon, and it is easier to cut because both halves are the same operation.
The expensive way to make one is a Festool Domino. The Beadlock is the cheap way: a guide block with three holes at a set spacing, clamped to the work, drilled through with a brad point bit, then repositioned and drilled again so the holes overlap. The result is a slot with a scalloped profile, and the matching Beadlock tenon stock is milled to fit it.
Why the scallops matter
A row of separate dowels gives you round glue surfaces and gaps between them. The Beadlock’s overlapping holes leave a continuous slot, so the tenon contacts the mortise along its whole length — far more side-grain glue area, which is where joint strength actually comes from.
It is not quite a rectangular Domino mortise, and in practice the difference is academic. Both are much stronger than the joint needs to be for furniture.
What it asks of you
Square clamping. The jig references off the face and edge of the workpiece. Clamp it off square and the mortise is angled, and the joint closes with a gap.
A vertical drill. The guide bushings control the hole position, not the angle beyond the bushing depth. Keep the drill in line.
Patience. Each mortise is six to nine holes with two repositions. On a four-leg table with aprons that is a lot of drilling. This is the real cost, and it is why people eventually buy machines.
Tenon stock
Beadlock tenon stock is proprietary and sold by Rockler. You can make your own with a matching round-over profile if you own a router table and the right bit, and plenty of owners do once they have worked out the profile.
What works
- It produces a genuine loose-tenon joint with a hand drill, at a fraction of one percent of what a Domino costs
- The glue surface is large — a scalloped tenon has more side grain in contact than a pair of round dowels of the same width
- Being a loose tenon, both halves are drilled the same way, so there is no tricky end-grain mortise to cut
What doesn't
- It is slow: each mortise is a row of overlapping holes drilled through a guide, repositioned twice
- Accuracy depends on clamping the jig square and holding the drill vertical, and a wandering hole is not fixable
- Tenon stock is proprietary and must be bought, unless you make your own with a matching router bit
Worth comparing against
- Check price
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