How is spur gear calculated?
Resources: Involute Spline and Serration Universal Design Calculator. Gear Spur Tooth Strength Equation and Calculator….Spur Gear Design Calculator.
| To Find | Equation |
|---|---|
| Pitch Diameter | D = N / P D = (N p ) / π |
| Root Diameter | DR = D – 2b |
| Whole Depth | a + b |
| Working Depth | aG + ap |
How do you calculate gear teeth?
Now we have the gear ratio i=d2/d1=z2/z1 (gear 1 is the driving gear, and gear 2 is the driven gear). The module also has to do with the tooth height, for standard gears, the tooth height equals to 2.25*m: addendum ha=1*m, dedendum hf=1.25*m, tooth height h=2.25*m.
What is Dedendum formula?
Dedendum (hf) is the distance between the reference line and the tooth root. hf = 1.25 m (2.6) Tooth thickness (s) is basically half the value of pitch (p). * Pitch (p) = πm. s = πm / 2 (2.7)
How do you calculate gear?
The gear ratio is calculated by dividing the output speed by the input speed (i= Ws/ We) or by dividing the number of teeth of the driving gear by the number of teeth of the driven gear (i= Ze/ Zs).
What is contact ratio in spur gears?
In its simplest form, contact ratio is the number of pairs of teeth in contact at one point in time. A ratio greater than 2 is not usually achieved in external spur gears, but can be accomplished by using internal, helical or nonstandard gears.
What is the contact ratio for the gear?
Standard gears have a typical contact ratio of 1.2 to 1.6. In their most basic form, gears are designed to transmit power, and HCR gears perform especially well.
What is addendum and Dedendum?
DEDENDUM Addendum is the height of the tooth above the pitch circle. Dedendum is the depth of the tooth below the pitch circle. Whole Depth is the total length of a tooth space equal to the sum of the addendum and dedendum.
Which is greater addendum or Dedendum?
DEDENDUM (b) is the depth of a tooth space below the pitch line. It is normally greater than the addendum of the mating gear to provide clearance. DIAMETRAL PITCH (P) is the ratio of the number of teeth to the pitch diameter.
How do you calculate gears?
A gear is made up of toothed wheels (“teeth”) connected to shafts. To calculate speed ratio, otherwise known as gear ratio, you divide the number of teeth of the input gear by the number of teeth of the output gear.
What is spur gear design?
Spur gears are one of the most popular types of precision cylindrical gears. These gears feature a simple design of straight, parallel teeth positioned around the circumference of a cylinder body with a central bore that fits over a shaft.
How do you calculate tire ratio?
To calculate the effective drive ratio of the new tires, multiply the diameters together, then multiply that figure by the gear ratio as follows: 26/28 = .92857142857. .92857142857 x 3.55 = 3.2964 or 3.30. As you can see, the larger tires reduce your final drive ratio to 3.30—a measurable difference.
What is Gear formula?
The first formula for determining gear ratio is based on knowing the driving gear revolutions per minute (RPM), notated as n Driving, and the driven gear RPM, n Driven. Given that knowledge we can calculate the gear ratio, R, that exists between them by the formula: R = n Driving ÷ n Driven (1)