Glossary “planing” Definition:
Condition that exists when a tire is unable to stay in contact with the ground or pavement due to water. Also known as hydroplaning or aquaplaning.
p
plasma
Glossary “plasma” Definition:
An inert gas used in welding, such as argon or nitrogen.
plasma arc welding (PAW)
Glossary “plasma arc welding (PAW)” Definition:
An arc welding process that uses a constricted arc between a non-consumable electrode and the weld pool (transferred arc) or between the electrode and the constricting nozzle (non-transferred arc) with shielding obtained from the ionized gas issuing from the torch, which may be supplemented by an auxiliary source of shielding gas.
planetary gear system
Glossary “planetary gear system” Definition:
A gear set consisting of a central sun gear surrounded by two or more planet gears which are, in turn, meshed with a ring gear, used in overdrives and automatic transmissions.
planet gears
Glossary “planet gears” Definition:
The gears in a planary gear set that connect the sun gear to the ring gear.
planet pinions
Glossary “planet pinions” Definition:
Small gears that orbit around the sun gear, meshing with and rotating between the sun and internal gears (ring gear).
planetary carrier
Glossary “planetary carrier” Definition:
The framework holding the planetary pinions within the sun gear.
planetary gear set
Glossary “planetary gear set” Definition:
A group of gears named after the solar system because of their arrangement and action. This unit consists of a center (sun) gear around which the pinion (planet) gears revolve. The assembly is placed inside a ring gear having internal teeth. All gears mesh constantly. Planetary gear sets may be used to increase or decrease torque and/or obtain neutral, low, intermediate, high, or reverse.
planet carrier
Glossary “planet carrier” Definition:
The cradle that holds the planet gears in a planetary gear set.
pkg
Glossary “pkg” Definition:
Acronym form of Package.
placard
Glossary “placard” Definition:
1). A notice for display in a public (obvious) place. 2). A label or poster.
plain bearings
Glossary “plain bearings” Definition:
Bushing type of bearing that uses no rolling parts and provides sliding contact between two mating surfaces.
plain ends
Glossary “plain ends” Definition:
End coils of a helical spring having a constant pitch and with the ends not squared.
pitting
Glossary “pitting” Definition:
Metal surface irregularities as a result of corrosion.
PIV
Glossary “PIV” Definition:
Peak Inverse Voltage
pivot
Glossary “pivot” Definition:
A pin or short shaft upon which another part rests or turns, or about which another part rotates or oscillates.
pivot bushing
Glossary “pivot bushing” Definition:
A rubber bushing in the front suspension located at the inner end of the control arms where pivoting occurs.
PK
Glossary “PK” Definition:
Pink.
pitman arm
Glossary “pitman arm” Definition:
Arm attached to the pitman shaft that moves the relay rod as the steering wheel is turned.
pitch tone
Glossary “pitch tone” Definition:
The observation of a color from an acute angle, possible from 45¡ã angle or less.