Glossary C

Glossary C

The part of the seal head section that is removed during trimming.

Case, Bonded:
A design feature of a type of radial lip seal wherein the heel of the sealing element is attached to the seal case by an adhesive during the molding operation.

Case, Clinched:
A design feature of a type of radial lip seal wherein the heel of the sealing element is attached to the seal case by clamping it between two convolutions, or folds, of the case.

Case, Inner:
A rigid, cup-shaped component of a seal assembly that is placed inside the outer seal case. It has one or more of the following functions: reinforcing member, shield, spring retainer or lip-clamping device.

Short axial cracks on the lip contact surface.

Clearance, Axial:
The gap between the toe face of the head sections and the inside surface of the inner case.

Cocked Assembly:
An installation in which the plane of the outside seal face is not perpendicular to the shaft axis.

One turn of the coiled wire garter spring.

A seal element comprised of two or more compounds bonded together to enhance seal performance and/or reduce costs.

Contact Line:
The circular line formed where the air-side and oil-side surfaces of the elastomeric lip element intersect. The contact line is a point when the seal element is view in cross-section.

Contact Line Height:
The axial distance from the outside seal face to the lip contact line.

Case, Molded:
A design feature of a type of radial lip seal wherein the lip and case are made integral in the molding process.

Case, Outer:
The outer thin-wall rigid structure of the lip-seal assembly which contains the inner case, the primaryseal ring, the spring parts and the secondary seal.

Case, Seal:
A rigid member to which the seal lip is attached.

Cavity, Mold:
A single unit or assembly of contoured parts in which a material, such as an elastomer, is shaped into a particular configuration.

Cavity, Seal:
The annular area between a housing bore and a shaft, into which a seal is installed.

Contact Point:
The area where the seal lip contacts the shaft.

Contact Width:
The axial dimension of the contact area that results when the seal is installed on the shaft.

Foreign matter on the seal surface.

A sharp break or fissure in the sealing element.

The time-dependent part of a strain resulting from stress.

Cure Time:
The time required to produce vulcanization at a given temperature.

Curing Temperature:
The temperature at which the elastomeric product is vulcanized.

A deep discontinuity in the seal material whereby no material is removed.

Cut, Trim:
Damage to the elastomeric portion of the seal during trimming.

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