Dovetail-Key Miter

Dovetail-Key Miter

Definition

Dovetail-Key Miter is a type of mitered corner joint in which one or both rails are routed to accept a butterfly-style plastic dovetail key or thumbnail biscuit. When inserted, the key aligns and pulls the two mitered pieces together, increasing corner strength and ensuring precise alignment. This technique is commonly used in picture framing and fine woodworking.

Features

• Incorporates a dovetail key or thumbnail biscuit to reinforce the miter.
• Ensures accurate alignment and prevents corner separation.
• Hidden from view once assembled, preserving aesthetics.
• Compatible with adhesives for added permanence.

Applications

• Picture frame construction with mitered corners.
• Cabinetry and furniture joinery requiring precise corner alignment.
• Reinforcing delicate or thin mouldings where standard joinery may fail.
• Professional framing where longevity and structural integrity are priorities.

Best Practices

• Route slots carefully to match the size of the dovetail key or thumbnail biscuit.
• Apply adhesive in the slots for a strong, permanent bond.
• Clamp mitered corners until adhesive cures fully.
• Select appropriate key size for the thickness and type of frame moulding.

Related Terms

• Joining
• Bridle Joint
• V Nails
• V Nails