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Spur Gear Data Formula

Spur Gear Data Formula

grabcad

The tutorial video on gear manufacturing provides the formula for calculating various dimensions. For a gear with 25 teeth, module 3.5, the pitch circle radius is (3.5 * 25) / 2 and the clearance circle radius is 0.94 times that. The addendum circle radius is the pitch radius plus the module, while dedendum is reduced by 1.25 times the module. Fillet radius is 0.39 times the module. Check out this video for more details: https://www.youtube.com/watch?v=cFjLp_11A9k

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