ounce-force inch [ozf*in] Unit Converter

Definition of ounce-force inch [ozf*in] unit

The ounce-force inch (ozf·in) is a customary unit of torque or mechanical work. It represents the work done when a force of one ounce-force acts through a distance of one inch in the direction of motion, equal to approximately 0.00706155 joule.

History of ounce-force inch [ozf*in] unit

The ounce-force inch developed from the British and American gravitational systems of measurement, where pound-force and ounce-force expressed weight-based forces rather than absolute units. Engineers and machinists used it alongside inch-pound and foot-pound units to describe small torques and energy values. Its foundation combines the avoirdupois ounce, equal to one-sixteenth pound, with the inch. Although the unit remains customary and non-SI, it appeared frequently in older mechanical engineering references, instrument specifications, and torque calculations. Modern standards generally favor newton-metre or joule, but ounce-force inch persists in specialized documentation.

Applications of ounce-force inch [ozf*in] unit

Today, ounce-force inch is used mainly for small-scale torque specifications in precision instruments, miniature motors, clockwork mechanisms, camera equipment, and electronics assembly. It can describe tightening torque for tiny fasteners or the output of a low-power actuator. Technical catalogs may convert values to or from millinewton-metres; engineers should confirm that “ounce” means ounce-force and apply consistent conversion factors.

Complete list of ounce-force inch [ozf*in] unit conversion