Speaking about mechanical gears, What is the pitch of a gear? Normally they give this to you in mm.?
Answer:
Pitch point' (p). The point where the line of action crosses a line joining the two gear axes.
'Pitch circle'. A circle, centered on and perpendicular to the axis, and passing through the pitch point. Sometimes also called the 'pitch line', although it is a circle.
'Pitch diameter' (D). Diameter of a pitch circle. Equal to twice the perpendicular distance from the axis to the pitch point. The nominal gear size is usually the pitch diameter.
'Pitch surface'. For cylindrical gears, this is the cylinder formed by projecting a pitch circle in the axial direction. More generally, it is the surface formed by the sum of all the pitch circles as one moves along the axis.
OPEN this link .it's include a gears types and a drawing shows the different pitchs.
i hope that i help u find what u r looking 4 :)
http://en.wikipedia.org/wiki/gear...
The pitch is the distance from tooth to tooth.
If the gear has a circumference of 300 mm, and it has 30 teeth, it has a pitch of 10mm. It will mate with other gears that have the same pitch, such as a gear with a circumference of 240mm and 24 teeth.
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