reduction gear

1 5.3

A group of gears that makes a fast shaft turn more slowly and gives more turning power to the output

noun
/rɪˈdʌkʃən ɡɪr/

Specialized

: reductor

In the case of these tractors, they are also used as PTO using a reduction gear and flywheel arrangement (as you can see in the picture).

You can lift any, any heavyweight using reduction gears.

Examples

A reduction gear is affected so that the plate is lifted by the cam 60 times a minute.

Academic text (1991)
Yes, if if you understand fulcrum, if you understand balancing, if you understand reduction gears, you can get, you can do it.
Low-maintenance reduction gears decrease the speed of the pump externally.

Academic text (1998)
The reduction gear allows the engine's speed to be reduced while increasing the torque for better performance.
Using a reduction gear, the device slows down the output shaft, which helps in lifting heavy loads more easily.
In the assembly line, each machine is connected to a reduction gear that optimizes its operational speed.

Synonyms

gearbox

vsreduction gear

12 4.6

A metal case that holds and protects gears in a car or machine

is the working gear group that actually lowers shaft speed and increases torque

gearset

vsreduction gear

Specialized

1 6.2

A set of gears that work together to change machine speed or power

is instead focused on reducing input speed and often boosting torque

gearing

vsreduction gear

Specialized

1 6.3

The parts in a machine that work together to change speed and force

is about a gear group that specifically reduces input speed and raises torque

geartrain

vsreduction gear

Specialized

6.9

A group of wheels with teeth that pass on and change movement and force

is designed specifically to reduce input shaft speed and increase torque

gear mechanism

vsreduction gear

Specialized

4.1

A group of wheels with teeth that pass movement and force to make a machine work

targets lowering shaft speed as its main mechanical purpose instead

decelerator

vsreduction gear

Specialized

6.5

A device that slows movement or reduces speed

uses gears specifically to lower shaft speed and usually increase torque

Surface Forms

reduction gear singular

reduction gears plural

Morphology

reduction + gear

The noun is directly compositional: 'reduction' (the process of reducing) + 'gear' (a toothed wheel or transmission component) yields a gear or gearset that reduces speed/increases torque. This follows a common noun–noun compounding pattern and is cross-linguistically transparent, so a B1 learner who knows both constituents can infer the meaning.

Etymology

The noun reduction gear comes from machines and tells the job it does. It is a set of gears where reduction means slowing down and gear means a toothed wheel, so the parts make a fast part turn more slowly while giving more turning power, which is why the name means 'reduce speed' and give 'more force'.