obtenons

Obtenons is not a standard term in English woodworking literature. If encountered, it is usually a misspelling or variant of "tenon." A tenon is a slender projection formed on the end of a workpiece that is designed to fit into a corresponding recess called a mortise, creating a mortise-and-tenon joint. This joint is widely used for its strength and flush appearance in furniture, cabinetry, and timber framing.

Tenons come in several common forms. The straight or full tenon extends across most of the workpiece with a matching shoulder. A stub or short tenon is smaller and projects only slightly. A haunched tenon includes a reduced section at the shoulder to accommodate additional members or to improve resistance to twisting. Sliding or through-dovetail tenons use a shaped profile that locks into a corresponding mortise or into a groove, offering increased resistance to pull-out.

Manufacturing a tenon typically involves removing material from the rail or rail-end with a saw and chisels, or by routing. The mortise is cut to a precise size to achieve an appropriate fit. Fits can range from sliding (loose) to a tight or slightly interference fit, depending on whether glue, pins, or wedges are used. The use of glue is common, while pins or wedges add mechanical strength and help prevent movement over time.

Advantages of the mortise-and-tenon joint include high shear strength, good alignment, and durability. Limitations include the need for careful measuring and precise cutting, as wood movement due to moisture can affect fit. The joint remains a staple in traditional woodworking and is frequently seen in chairs, tables, frames, and fine cabinetry.