Belting Glossary

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There are 17 names in this directory beginning with the letter O.
Offset idler
The center carrying roller which is offset and transversely lapping the troughing idlers.

Oil proof
Not adversely affected by exposure to oil.

Oil resistant
Withstands the deterioration effect of oil(generally refers to petroleum) on the physical properties.

Oil swell
The change in volume of a rubber article due to absorption of oil.

Oil well splice
Two ends of a belt each bent 90 degrees around a steel form and bolted together through the belt and steel form.

Oligomer
A polymer consisting of only a few monomer units such as in dimer, a trimer, a tetramer etc. & their mixtures.

One side
Pertains to one of the two outward faces or surfaces of a conveyor belt (not the edges of the belt).

Open seam
A seam whose edges do not meet creating a void.

Operating tensions
The tension of longitudinal sections of a belt system (tight side and slack side) when moving material, as distinguished from tension when the belt is running empty.

Optimum cure
The time, temperature and compression of vulcanization or of fusion at which a desired combination of properties is attained in an elastomer.

Organosol
A suspension of a finely divided plastic in a plasticizer with a volatile organic solvent.

Outside diameter eccentricity
The degree a pulley is out-of-round with respect to is central axis.

Oven
A low pressure hot air chamber used for the purpose of heating, drying, baking or vulcanizing rubber products. See Aging.

Oxidation
The reaction of oxygen on a rubber product, usually detected by a change in the appearance or feel of the surface or by a change in physical properties.

Oxygen bomb aging
A means of accelerating change in the physical properties of rubber compounds by exposing them to the action of oxygen at an elevated temperature and pressure.

Ozone cracking
Belt cover cracks or crazing caused by exposure to ozone in the atmosphere.

Ozone resistant
Withstands the deteriorating effects of ozone (generally cracking).