Loose Tenons are also known as Floating Tenons. This new product works the same way as our Expansible Dowel Pin ®. We manufacture them oversize from Hard Maple or Birch then compress them with angled grooves (2° each face, top and bottom angles are opposite, 4° total). This helps prevent withdrawal, unlike straight grooves that can pull straight out if the glue bond should fail. A chemical bond forms between wood and glue with a gap of about .003” and forms on either side of each groove. The more grooves there is the more surface area is available for the bond to form. This tenon takes advantage of compressed dry woods' ability to expand and regain much of its original size with the addition of glue moisture. Water based glues are not 100% solids and shrink during curing. Our tenons absorb some of this glue moisture and the grooves expand to take up the space left by the shrinking glue, creating an excellent mechanical and chemical bond.
Our Compressed Loose Tenons are packaged 3 - 12” lengths to a pack.
The rationale behind the sizes;
1/4" x 3/4", 5/16” x 13/16”, 3/8” x 7/8" and 1/2” x 1” tenons can use mortises made with the same jig setting or template with only a change in the router cutter. In this case, 1/2" center to center, plus the router cutter diameter.
The same relationship exists between 1/4" x 1 1/4", 5/16” x 1 5/16”, 3/8” x 1 3/8” and 1/2" x 1 1/2" with 1” center to center. Just change the router cutter and your set for the next size up.
3/8” x 2 3/8” and 1/2" x 2 1/2" requires 2” center to center.
1/4" x 1 1/8” is intended for use in conjunction with JessEm’s 08200 Pocket Mortise Mill II, 1 1/4" is a little too wide.
All sizes are suitable for use with any jig that is adjustable, as well as most template systems and other methods of routing mortises such as router tables, pin routers and mortising machines.