Crossed helical gearing a.k.a. screw gears
2020-1-15u2002·u2002The unique situation of crossed axis helical gears is that if you set the helix angles β 1 and β 2 to 45 degrees and both gears are of the same hand, then the resulting shaft angle Σ becomes 90 degrees and the gear pair will operate as a right angle drive.
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