Interface between two parts.

Ball Joint

A flexible joint consisting of a ball in a socket - locks the two parts in translation, but allows all degrees of rotation.

Biscuit Joint

An oval shapped disk that when inserted in a slot with glue swells to form a tight bond. A special tool is required to cut the slot.

Butt Joint

To place materials end-to-end or end-to-edge without overlapping.

Dovetail Joint

A joint where the fingers are shaped like a doves tail, used to join pieces at 90 degrees.

Finger Joint

Long tapered fingers used to join material lenghtwise, often used in manufacturing moulding to join short lengths.

Keyed Joint

A joint in which one structural member is keyed or notched into an adjoining member as in timber construction.

Mitre Joint

Pieces are cut on an angle to make a joint.


A cavity or hole cut to allow a tennon to pass through to make a joint.

Rigid Joint

Prevents adjacent parts from moving or rotating past one another.

Roller Joint

Allows adjacent parts to move controllably past one another.


A projection made by cutting away the wood around it to insert into a mortise to make a joint.

Tongue and Groove

A joinery method where a board has a protruding tongue on one edge and a groove on the other, the tongue of one board fits into the groove of the next.

Vee Joint

Tongue and groove boards with their top corners beveled so when the two boards come together a V is formed.

See also: Ball Joint, Biscuit Joint, Bolted Joint, Butt Joint, Clamping Force, Dovetail Joint, Finger Joint, Lap Joint, Mitre Joint, Mortise, Rigid Joint, Roller Joint, Scarf Joint, Splice, Tee Joint, Tenon, Tongue and Groove, Vee Joint.

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Subjects: Mechanical Engineering