Formula Sheet

m = module 

N = number of teeth

PA = Pressure angle = degrees

a = Addendum = m

b = dedendum = 1.25 * m

dP = pitch diameter = m * N

dbc = base circle diameter = dP *  cos(PA)

D = diametral pitch = 25.4 / m

P = circular pitch = Pi / D

ht = whole depth = 2.157 / D

c = clearance

hk = working depth = 2 / D

b = face width
n = speed (rpm)
w = transmitted power (hp)
V = velocity of pitch diameter = Pi * dP *n / 60000
Ft = tangential force = (w*745.69987) / V
LS = Lewis tooth stress = Ft / (m * b * Y)

Gear Dimensions Calculator

Purpose

To provide an easy way to calculate gear dimensions without tediously using spreadsheets and hand calculations. This program saves time and effort by providing an easy and frustration free way to calculate gear dimensions.

Current Version

The current version is v1.0. Features of this program:

• Spur gear calculation

Update Schedule
V2.0

• Formula sheet
• Spur Gear Stresses
• Minor cosmetic updates

V3.0

• Bevel Gear Calculations
• Resources Page

Instructions

1. Extract files

2. Open application file (not the XML file) 

3. Fill in values 

4. Press Calculate

5. Press reset to remove all values

Download

• Martin's Gear Calculator v1.0          Download        
• Martin's Gear Calculator v2.0          Download

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