TM 9-2610-200-14
E-5
APPENDIX E: GLOSSARY (Con't)
Radial Cracking
Cracking, usually near or in the rib area, resulting from underinflation or
ozone exposure.
Rasp
A tool used for roughening rubber surfaces.
Reinforcement
Any material, usually rubber and fabric, vulcanized to the tire to add
strength to the cord body at an injury point.
Repair Gum
Material used for filling voids or covering reinforcing material in a tire
repair.
Repaired Tire
Any tire with punctures, cuts, or other types of injuries that has been
reconditioned as required to provide additional safe service life .
Repair Patch
The reinforcing material used to strengthen the area around an injury in a
tire.
Repair Plug
The rubber material that fills the cavity of an injury in a tire.
Retread Tire
A casing to which tread rubber has been affixed to extend the usable life
of the tire.
Reversion
Excessive heating of a cured rubber compound leading to deterioration of
its physical properties.
Rim
A metal support for a tire or a tire and tube assembly upon which the tire
beads are seated.
Rim Diameter
The diameter (conventionalized) of the rim corresponding to the tire bead
heel.
Rim Flange
That part of the rim that supports the bead heel and resists lateral
pressure.
Roller
A hand or power operated roller used for applying pressure to uncured
rubber stocks, thereby removing air and ensuring a better bond during
buildup operations.
Scorching
Premature vulcanization or setup of raw stock during processing.
Scorch Point
The beginning of vulcanization. When rubber reaches the scorch point it
will not flow enough to fill out a mold.
Section Repair
Repairs made to the casing when an injury has extended through the tread
or sidewall of a tire. The damaged cord is removed and new cord is
replaced in the form of a repair unit or patch. See Chemical Cure .
Self-vulcanization
Vulcanization at room temperature or above; activated by chemical
agents without the application of heat from an outside source. See
Chemical Cure.
