Comb finger joints, also known simply as finger joints, are a type of wood joint. They are made by cutting multiple interlocking profiles into two pieces of wood, which are then glued together. The resulting joint has the appearance of interlocking fingers.
How Finger Joints Work
Finger joints are a strong and reliable method of joining two pieces of wood end-to-end. Here's a breakdown of their key features:
- Interlocking Profiles: These are created on both pieces of wood using a router, saw or other woodworking tool.
- Glue Application: After the profiles are cut, adhesive is applied to all surfaces that will make contact.
- Joint Formation: The two pieces are then pressed together and clamped, allowing the glue to create a strong bond.
- Appearance: When joined, the cross-section of the joint resembles a series of interlocked fingers.
Advantages of Comb Finger Joints
- Strength: Finger joints provide excellent tensile strength because of the increased gluing surface area. The multiple interlocking fingers distribute the force over a large area making the joint stronger than a simple butt joint.
- Precision: This technique requires accurate cuts and precise alignment, leading to a very stable joint.
- Versatility: Finger joints can be used in various woodworking applications like furniture making, frames, or boxes.
Examples of Where Finger Joints are Used
- Furniture Construction: For joining pieces of wood used to build drawers, cabinets, and other furniture components.
- Picture Frames: For creating strong and stable frames.
- Boxes and Containers: For creating robust boxes or containers that will withstand stress.
- Length Extension: Used to join short pieces of lumber together to create longer, more usable lengths for construction or woodworking.
In conclusion, comb finger joints are a strong, reliable method of joining wood pieces end-to-end. The characteristic interlocking "finger" profiles contribute to their strength and versatility in various woodworking applications.
