Offcut
A waste piece of lumber.
Ogee
An S-shaped profile
Oil Stain
A stain formed by mixing oil-soluble dyes in an oil or oleo resinous base
On Center
Setting two points so they are equidistant from a center point; also used when spacing studs or slates (abbrev “O.C.”)
One-By (1-by)
Dimensional lumber nominally 1" thick
Open Time
The amount of time that glue can be exposed to the air and still be workable; also called working life or pot life
Open-Grained
Any wood with wide, conspicuous growth ring, large pores, and a grainy surface texture, such as oak, ash, and walnut; also called coarse-grained
Open-Slot Mortise
A mortise made in the end of a board used in a bridle joint
Orbital
An eccentric, somewhat circular motion used by some powered cutting and sanding tools
Orbital Sander
A type of finishing sander where the motor’s energy is converted to minute circles, which causes sandpaper to abrade a surface
Oriented Strand Board (OSB)
Type of building panel similar to plywood, made up of small, flat wood chips glued together to form large sheets; often abbreviated OSB
Oscillating Drum Sander
A powered surfacing tool in which an abrasive cylinder simultaneously rotates and moves up and down for sanding complex shapes
Outboard Turning
To pivot a lathe's headstock away from the lathe bed, increasing the machine's capacity for turning large bowls
Outfeed
The side of a cutting tool where the processed material exits; The point where the workpiece exits a machine