A gear is a mechanical system composed of two or more toothed wheels for the transmission of the rotational movement.
A gear is composed of a pinion (so called the only wheel or the smallest wheel) and a wheel, a rack or a crown. When there are more than two toothed wheels, it is called a gear train.
Gear with parallel axes
Gear whose axes are parallel.
Gear whose axes have a point of intersection, the conical pinions
Gear whose axes are neither parallel nor concurrent, the gears wheels and worms.
(Α) It is generally 20 ° but it also exists at 14 ° 30, 30 ° ...
(ß) Angle of inclination of a helical gear. It may be right or left.
The helix angle will vary the Ø d and the diameters Ø da and df.
Ø primitive: d = m * z
Head Ø: da = d + 2 * m
Ø of foot df = d-2.5 * m
Pitch of the teeth: p = π * m.
Name of the smallest wheel or wheel.
We speak of a gear train when there
Fluted satellite doors
Fluted titanium shafts
Case hardened pinion
of a wheel on
MAAG SH / 300
12 tooth sprocket
Module 10 & 20 °
in Tri Dim
Propeller, Profile, Step