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Face gear 9

Car differential with face gears.

The green gear (receiving torque from engine) rotates with constant speed Ng. If the speed N1 of the red gear of Z1 teeth varies (even reverses), the speed N2 of the yellow gear of Z2 teeth (Z2 = Z1) varies accordingly to maintain the equation:

2.Ng = N1 + N2

Advantages over bevel gear differential:

- No need for the exact axial positioning of the pinions.

- Tolerable contact pattern changing.

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