DICTIONARY OF AUTOMOTIVE TERMS - "Or"

Orange peel:

A rough paint surface, resembling the skin of an orange caused by the paint spray failing to flow together.

Orbital sander:

A flat, cushioned plate covered with abrasive paper, rotated with an elliptical motion by an electric motor and used for fine sanding work like feather edging. Also see disc sander

Order:

See firing order

Ore-bulk-oil carrier:

See OBO ship

Ore carrier:

A large ship designed for the transportation of ore.

Organic:

1. Something of chemical compounds that are based on carbon chains or rings and containing hydrogen with or without oxygen, nitrogen, or other elements. The opposite is inorganic
2. Pertaining to or derived from living organisms.

Organic friction material:

A friction material having organic binders, substantially formulated with non-metallic fibers.

Organic linings:

Brake lining material using asbestos as its main ingredient

Organization for Economic Co-operation and Development:

(OECD) An organization whose purpose is to provide its 29 Member countries with a forum in which governments can compare their experiences, discuss the problems they share and seek solutions which can then be applied within their own national contexts. Each member country is committed to the principles of the market economy and pluralistic democracy.

Orientation:

The tendency of plastic molecules if stretched, to align themselves in the direction of the stress. Molecular orientation leads to anisotropy of mechanical properties (i.e., having different mechanical properties in different directions). This can be used to advantage in the production of fibers and film or may be the undesirable result of a molding process

Orifice:

1. Opening through which gases flow. It is usually the final opening, or any opening controlled by a valve.
2. Accurate size opening for controlling fluid flow.

Also See:
atomization orifice
lateral atomization orifice

Orifice spark advance control:

(OSAC) a device used by Chrysler to apply vacuum advance over a period of time. By limiting the timing advance rate, NOx is reduced

Orifice tube:

Metering device consisting of a restricting tube with inlet and outlet screens.

Orifice valve:

See oil control orifice valve

Orig:

Abbreviation for "original," as in orig. owner.

Original condition:

An older vehicle that has all of its original paint and equipment and has not been restored or modified.

Original equipment:

These are the items on a vehicle which came from the manufacturer. It does not include accessories produced by "aftermarket" companies (sometimes called "jobber"). Generally original equipment parts are the best for the vehicle. Although it must be admitted that some aftermarket products are better quality and may be less money; however the opposite is also true.

Original equipment manufacturer:

(OEM) A generic term that refers to an automobile company or supplier which manufactures the parts used in the original assembly a vehicle.

Original finish:

The paint applied to vehicle when it is built by the manufacturer.

O ring:

See O-ring.

O-ring:

An o-ring is a doughnut shaped (annular) rubber or plastic ring which is placed in a groove and compressed to seal fluid or gas from passing a particular point.

O-ring chains:

A drive chain (usually used on motorcycles) which has small neoprene o-rings within the exposed rollers to encircle the pins. The o-rings help to prevent dust from getting in and thus the chain lasts much longer.

Orphan bikes:

Rare bikes that are no longer in production

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