Dimensions According to ISO Designation -

Design of Sprocket -

    Basic Terminology for Construct Sprocket-

               

All Dimension are in Inch

Required Data OR Dimension-

                  

 In this Chain 

1/4" is the chain pitch 

0.13" is the max. roller diameter 

WE CHOOSE NUMBER OF TEETH IN SPROCKET IS 10

TO Find Pitch Circle Diameter 

where Z is the number of teeth 

For the above formula's we get 

Tooth Angle is 36 Degree

Pitch Circle Diameter is 0.809"

TO Root Circle Diameter 

the Root Circle Diameter is 0.679"

Top Diameter 

 OR

We Use MAX Diameter

So the max Diameter is 0.9915"

According to above calculation how to Draw sprocket to Visit this video - https://youtu.be/KajHmICM2q0