Designing a parametric Spur gear in Fusion 360

Mufaddal Rasheed Author

A walkthrough on how to design a spur gear with calculations in Autodesk Fusion 360

Design of a Gear Mesh for Speed reduction

Calculations:

Data for Design in CAD:

Pinion pitch circle = 100 mm

Pinion base circle = 93.969 mm

Pinion Addendum circle = 110 mm

Pinion Dedendum circle = 87.5 mm

Gear pitch circle = 200 mm

Gear Base circle dia = 187.9 mm

Addendum circle = 210 mm

Dedendum circle = 175.4 mm

Workflow in Autodesk fusion 360 :

Create sketch for pinion – pitch circle, base circle, addendum circle and dedendum circle
Using base circle create an involute profile
Angular location of involute profile with respect to vertical based on tooth width (circular pitch/2)
Find the angle for one gap on pitch circle . Use that line to mirror the profile and join elements
Create a solid with addendum circle
Cut the solid with the profile for gap between tooth
Pattern
Repeat for Gear

For the a demonstration on how its done watch the video :