# How Do You Calculate Gear Teeth

### Gear terminology and teeth calculation formulas easy guide ...

If the teeth are not machined by tooth cutters, and the teeth profiles are still kept intact, then the 2 gears will get jammed in transmission. The formula for calculating the minimum teeth number without undercutting is: z min =2ha*/sin 2 α. When ha*=1, and α=20°，we will have the z min =17. So, the minimum teeth number for standard gears is 17. More Information

### Calculation of Gear Dimensions | KHK Gears

Number of teeth in gear z2: 34 and higher: 33 and higher: 32 and higher: 31 and higher: 30 and higher: 29 and higher; Working depth hw: 1.500: 1.560: 1.610: 1.650: 1.680: 1.695; Tooth depth h: 1.666: 1.733: 1.788: 1.832: 1.865: 1.882; Gear addendum ha2: 0.215: 0.270: 0.325: 0.380: 0.435: 0.490; Pinion addendum ha1: 1.285: 1.290: 1.285: 1.270: 1.245: 1.205; Tooth thickness of gear s2: 30: 0.911: … More Information

### Basic Gear Terminology and Calculation | KHK Gears

h a = 1.00 m = 1.00 × 2 = 2.00. h f = 1.25 m = 1.25 × 2 = 2.50. In the previous pages, we introduced the basics of gears, including 'Module', 'Pressure Angle', 'Number of Teeth' and 'Tooth Depth and Thickness'. In this section we introduce the basic parts of Spur Gears (Cylindrical gears) … More Information

### Gear calculation: essential ideas in your mechanical ...

Therefore, and keeping in mind the engagement of gear and pinion, the gear ratio is calculated using the number of teeth on the gear divided by the number of teeth on its pinion. Pitch diameter: Found based on the number of teeth and the centre distance the gears operate at. More Information

### How To Calculate Gear Ratio - HBReducer

We can express this basic concept with the formula Gear ratio = T2/T1, where T1 is the number of teeth on the first gear and T2 is the number of teeth on the second. Method 1 of 2: Finding the Gear Ratio of a Gear Train More Information

### Spur Gear Calculator | tooth profile design & strength ...

The gear calculator provides ‘x,y’ drawing co-ordinates for both the pinion and the gear teeth. These are listed below the output data in the ‘Data Listing’ window. You simply copy and paste the lists into your preferred spreadsheet and use its chart generation procedure to draw them. More Information

### Spur gear calculators | Ultrascale Products

Example to calculate the centre distance of two 64 dp spur gears. To calculate the centre distance for a 13T * (14T) spur gear and a 22T spur gear. The number of teeth which should be entered are 14T and 22T, this will give the correct centre distance. If you enter 13T … More Information

### Gear Design Equations and Formula | Circular Pitches and ...

Spur Gear design formula for geometry, pitch, tooth clearance and critical functional data. (Inch Units Applicable for Constants) Spur Gear Design Calculator. Where: φ = Pressure Angle. a = Addendum. a G = Addendum of Gear. a P = Addendum of Pinion. b = Dedendum. More Information

### Speedometer Gear Calculator - TransmissionCenter.net

There are two driven gear housings, one for 34 through 39 tooth driven gears and one for 40 through 45 tooth driven gears. Look at the bottom of the speedometer face for the numbers 940, 960, 1000, or 1020. These numbers are the number of revolutions the speedometer cable must turn in one mile of travel. Your speedometer may or may not show a number. More Information

### Spur Gear Calculator | tooth profile design & strength ...

Sizing You should size your pinion and its teeth to suit the recommended materials for gear wheel manufacture, e.g. carbon steel (see 'Material Selection' below).. Given that you have decided on using a free-cutting carbon steel (see SAE Special Carbon Steels, 11XX) for the pinion, the maximum permissible bending stress (σᴾ) must be less than or equal to the minimum specified yield stress ... More Information

### 4 Easy Ways to Determine Gear Ratio (with Pictures)

Then, divide the number of teeth on the driven gear by the number of teeth on the drive gear to get the gear ratio. For example, if the drive gear has 20 teeth and the driven gear has 30 teeth, the gear ratio is 1.5. If you want to learn how to use the gear ratio to calculate the gears' speeds, keep reading the article! More Information

### Working out the number of Teeth from Gear Ratios | Gears ...

The ratio for (e.g.) gear 1 is defined to be 4. The ratio of 4 is split into the constant gear N2/N1 and the gearpair NG1/NP1. N2/N2 is assumed to be 1,25. The sums N1+N2 and NG1+NP1 hast to be equal (module is same) Calculate multiple values of 2,25 and 4,2, since the teeth … More Information

### Ring and Pinion Ratio Calculator (By Number of Teeth)

For example, a 3.73 gear ratio requires 3.73 driveshaft rotations to turn your tires once around. You should be able to find your gear ratio listed on the axle tag, however, if that has gone missing, you can simply count the number of teeth on each gear and divide the number of ring gear teeth by the number of pinion gear teeth. More Information