Definitions for

**"Gear Ratio"****Related Terms:**Axle ratio, Pinion, Gear, Gearbox, Spur gear, Gear train, Downshift, Gears, Transmission , Ring gear, Upshift, Shifter, Granny gear, Continuously variable transmission, Derailleur, Synchromesh, Final drive ratio, Fixed gear, Overdrive, Chainring, Engage, Bevel gears, Sprocket, Final drive, Countershaft, Gear train, Cassette, Rack and pinion, Differential, Mesh, Worm gear, Power train, Gearbox, Drive train, Automatic transmission, Half shaft, Transfer case, Bevel gear, Train, Manual transmission, Freewheel, Power steering, Chain drive, Cog, Drive wheel, Four-wheel drive, Cvt, Driveshaft, Velocipede

Ratio of angular velocities of pairs of meshing gears.

Mathematical formula CT / ST x WD, whereby CT = Chain Teeth, ST = Sprocket teeth, WD = Wheel Diameter.

Ratio of number of teeth on driving gear to those on driven gear; expressed as number of revolutions driving gear must make to produce one revolution of driven gear.

the formula is: the number of teeth on input gear divided by the number of teeth on output gear

The ratio of engine RPM's to rear wheel RPM's. This determines the how fast the car will run on the race track as well as the fuel efficiency of a racecar. More speed requires more fuel.

the mathematical relationship between the number of teeth on the pinion gear and the number of teeth on the ring gear (or any two types of gears).

The ratio between the number of teeth on meshing gears.

divide the number of teeth on the driven gear by the number of teeth on the driving pinion gear.

Is the ratio of the numbers of teeth in mating gears. (Driver/Driven)

The relationship between two gears determined by dividing the number of teeth on on the driving gear by number of teeth on the driven gear and expressed as a ratio to one.

Numerical ratio comparing the number of teeth on a pair of meshed gears.

A numeric indication of the difference in number of teeth on two gears. Example: A gear with thirteen teeth drives a gear with forty-two teeth, the ratio would be equal to 42 divided by 13 which is equal to 3.23. The correct method of indicating this gear ratio is 3.23:1. This means that for one rotation of the driven gear, the drive gear had to rotate 3.23 times. Geromatic is a combination of a disc clutch and a G- rotor pump, reacting to the difference in revolutions by building up pressure and activating the clutch. An internal valve system provides constant torque difference revs in relation to temperature. A high-pressure valve limits the torque and prevents the drivetrain from overloading. In the Twin-Geromatic version there is no bevel wheel differential in the rear axle. The unit functions as a coupling of the rear axle to the drive as well as a differential across the rear axle, including a lock. In special cases it can be turned off externally, e.g. use of small spare wheel. Source: www.magnasteyr.com

Ratio of the numbers of teeth on mating gears. Ordinarily the ratio is found by dividing the number of teeth on the larger gear by the number of teeth on the smaller gear or pinion. For example, if the ratio is 2 or “2 to 1”, this usually means that the smaller gear or pinion makes two revolutions to one revolution of the larger mating gear.

ratio of the motor input speed to the gearhead output speed.

a comparison of the tota l n umber of turns of input to the turns of output

a number that describes the difference in speeds of two meshed gears

The ratio of the number of rotations of the driving gear to the driven gear.

It is the ratio between number of teeth of the meshing gears.

With regard to speed reducers, the ratio that represents the comparison between the input speed of the gearmotor and the output speed of the gear head.

The difference in the number of rotations between the engine crankshaft and the transmission output shaft, which allows the transmission to vary speed and torque.

a comparison of the number of teeth on the input and output gears in a gear train

A ratio expressing the number of turns a smaller gear will make to turn a larger gear through one revolution. The ratio is found by dividing the number of teeth on the smaller gear into the number of teeth on the larger gear.

The number of revolutions of a driving gear required to turn a driven gear through one full revolution. For a pair of gears the ratio is found by dividing the number of teeth on the driven gear by the number of teeth on the driving gear. Changing tire size will change the effective gear ratio. An increase in loaded radius will increase ratio, increase speed and reduce power.

Ratio of the number of teeth on mating gears (larger gear : smaller gear). For example, a ratio of 16:1 means that the smaller gear (or pinion) makes sixteen revolutions for every one revolution of the larger mating gear.

The speed of the engine compared with the output speed of the transmission, and/or the differential, in a given gear.

The ratio between the sizes of the drive sprocket and the driven sprocket. Different ratios can quickly be set by changing the size of the driven sprocket. In non- shifter karts, this is the only way to change gears. Also called the reduction ratio.

Number, usually expressed as a decimal fraction, representing how many turns of the input shaft cause exactly one revolution of the output shaft. Applies to transmissions, power takeoffs, power dividers and rear axles. Example: If 2.5 revolutions of an input shaft cause one revolution of the output shaft, the gear ratio is 2.5:1.

This how many turns is required from a smaller pinion gear to power a driven gear through one full revolution. (See Pinion).

The speed relationship that exists between a driving (input) and a driven (output) gear. For example, a driving gear that revolves twice for each driven-gear revolution has a 2 to 1 (2:1) ratio.

The ratio of radii, diameters, or circumferences of two gears. When two gears are meshed, the gear ratio is equal to the ratio of the torques exerted by the gears and to the reciprocal of the ratio of their angular velocities.

The ratio between the numbers of teeth on meshing gears.

The relationship between the number of turns made by a driving gear to complete one full turn of the driven gear. If the driving gear turns four times to turn the driven gear once, the gear ratio would be 4 to 1. In most instances, the gear ratio is not even like 4:1 because the same teeth would be meshing with each other. Thus a ratio of 4.11:1, for instance, means that a particular tooth on one gear may eventually mesh with every one of the teeth on the other gear. Changing the tire size will change the effective gear ratio.

The gear ratio is the relationship between the number of teeth on two gears that are meshed or two sprockets connected with a common roller chain, or the circumferences of two pulleys connected with a drive belt.

A number which indicate the relationship between two gears and tells you how much work a particular combination of gears will do.

The proportional relationship of two different sized gears that are in contact with each other.