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TPI (teeth per inch)

The number of teeth per inch of saw blade. See Points.

Traditional (Wooden) Planes

Planes with a wood body and a blade held in place with a wood wedge. Referred to as "woodies."

Transitional Planes

Planes that have wood bodies, but have metal working parts that are used to secure and adjust the blade.

Travisher (chairmaker's shave, bottomer's shave)

A spokeshave with a slight curve from end to end; used for finishing saddling on Windsor seats.

Trenail, Treenail, Trunnel

A wooden peg used to fasten timbers. In shipbuilding, the pegs would swell with water to strengthen the joint.

Try Square

A square with a steel tongue in a wooden handle.

Trying Planes

Planes 20 to 24 inches long used to flatten the surface of a board and remove the marks left by the jack on the fore plane. See also jointer plane.

Tung oil

Oil finish expressed from tung nuts, originally from China.

Tuning

The process of adjusting all of the working parts of a plane to their optimum positions and removing all imperfections in the casting left from the manufacturing process.

Turning

A piece of wood that has been shaped on a lathe. The act of cutting a piece of wood on a lathe.

Turpentine (spirits of turpentine)

A solvent used in oil-based finishes. It is distilled from the gum of pine trees. Because it is more expensive than other solvents like mineral spirits, turpentine is not included in most modern formulas. It is still regarded as the ideal thinner for products containing linseed oil because it increases brushability and flowing characteristics and because it aids in the drying process by conveying oxygen to the oil.

Tusked Tenon

Same as Through Tenon

Twin Tenon

Used on tall lumber, two tenons are cut top-to-bottom and fit into two mortises.

Twist

Warping in lumber where the ends twist in opposite directions. (Like twisting a towel)

Tyloses

A waterproof foam like substance that forms in the pores of some species of wood. The tyloses helps to make the wood less permeable to liquids. It is common in White Oak and makes that wood excellent for wine barrels.

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