Glossary “rippling” Definition:
A wavy surface or “fish scale” on the teeth at right angles to the direction of the sliding action is referred to as “rippling”. This may be caused by a lack of lubrication, heavy loads, or vibration.
r
rise time
Glossary “rise time” Definition:
1).The time, measured in milliseconds or microseconds, for the output of a coil to rise from 10% to 90% of its maximum output. 2). The time it takes the signal on a oscilloscope to rise form its minimum to its maximum.
riser valve
Glossary “riser valve” Definition:
Term used for heat-riser valve.
ring ridge
Glossary “ring ridge” Definition:
Ridge left at the top of a cylinder wall as the wall below is worn away by piston-ring movement.
ring spacing
Glossary “ring spacing” Definition:
Width of the piston ring land.
ring gear
Glossary “ring gear” Definition:
1). The gear around the edge of a flywheel. 2). A large, circular gear such as that in the final drive assembly. 3). The outermost member of a plantary gearset which has teeth in the inside circumference.
ring groove spacer
Glossary “ring groove spacer” Definition:
Strips of thin metal used to fill the gap left between the piston and ring groove after the groove has been machined.
ring grooves
Glossary “ring grooves” Definition:
Grooves machined around the piston wall to support the rings.
ring land
Glossary “ring land” Definition:
The surface of a piston between ring grooves.
ring expander
Glossary “ring expander” Definition:
Flexible spring-steel part placed behind certain piston rings to increase ring pressure on the cylinder wall. May also refer to a tool that is used in the installation of piston rings, which aids in their installation.
ring flutter
Glossary “ring flutter” Definition:
Rapid up and down movement of a piston ring that breaks the seal between the ring and the cylinder wall.
ring gap
Glossary “ring gap” Definition:
The gap between the ends of a piston ring installed in the cylinder generally 0.004 inch (about 0.1 mm) for each inch (25.4 mm) of cylinder diameter.
ring and pinion
Glossary “ring and pinion” Definition:
Combination of a ring gear attached to the differential and the pinion at the end of the drive shaft.
rim safety ridge
Glossary “rim safety ridge” Definition:
The small, metal ridge just inside the tire-bead section to retain the tire position on the rim in case of a flat or blowout that tends to keep the bead of an uninflated tire out of the rim drop-center area.
ring
Glossary “ring” Definition:
1). Term that generally applies to piston ring, compression ring, or oil ring. 2). A gasket, such as an O-ring. 3). A hollow noise, such as when striking a sound brake drum.
rigid rear suspension
Glossary “rigid rear suspension” Definition:
Suspension system which as both rear wheels attached to the ends of a solid rear axle housing.
rigid transmission mount
Glossary “rigid transmission mount” Definition:
Solid mount for attaching the transmission to the frame without any provisions for vibration dampening.
rim
Glossary “rim” Definition:
1). Rear Integration Module 2). Outer edge of a bare wheel.
rim offset
Glossary “rim offset” Definition:
Distance between the wheel-rim centerline and the mounting face of the disc affecting front suspension loading and operation.
rigid axle suspension
Glossary “rigid axle suspension” Definition:
Term used for solid axle suspension.