You will need

- calculator;
- - locksmith set of keys;
- roulette;
- - tachometer.

Instruction

1

The type of transfer gears are classified as follows: cylindrical, conical, worm, planetary and combined. Transmission gear distinguish gear, hypoid gear, chain, belt, screw, wave transmission and friction. For any type

**of gear**gear ratio**number**is equal to the ratio of frequencies of rotation (or angular velocity) drive shaft and slave.2

For timing, belt, chain and worm gears gear ratio

**number**can be determined by the type of the elements**of the reducer**.Open the lid**of the gearbox**in order to have access to its elements.3

Gear peridotite

**the number**of teeth of driven gear N and**the number**Q of the teeth of the driving gear. Divide N by Q. the resulting value ratio (**in number**)**of the reducer**gear.4

Belt paratacamite diameters of the driving and driven pulley. The ratio of larger diameter (leading) to the smaller (slave) — transfer

**number****of a reducer**with a belt drive.5

Chain peridotite

**the number**of teeth of a leading (large) and idler (small) sprocket. Transfer**number****of a reducer**with chain transmission is equal to the ratio of the number of teeth of large and small stars.6

The worm will predicatability

**the number**of visits to J on the worm and**the number**of teeth on the worm wheel. The ratio of G to J — transfer**number****of a reducer**, worm gear.7

The transfer

**number**can be calculated by the speed of rotation of the driving and driven shaft. Measure using a tachometer rotational speed N of the drive shaft, which is driven by a power unit (motor). It is equal to the frequency of rotation of the motor shaft.8

Measure

**the number**of revolutions n of the driven shaft, which results in the movement of the working body.9

Divide the frequency of rotation of drive shaft N for the rotational speed of the slave shaft n. The obtained

**number**is the gear ratio of this**gear**.