| 1. | Common applications are screws, helical gears, and worm gears.
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| 2. | He is remembered chiefly for the make of car double helical gears.
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| 3. | The pump is driven by a jackshaft and helical gear.
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| 4. | Two mating helical gears must have equal helix angle but opposite hand.
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| 5. | By adding a second helical gear in opposition, this force is cancelled.
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| 6. | A new manual 3 speed syncromesh transmission was quieter with all helical gears.
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| 7. | Two external helical gears operating on parallel axes must be of opposite hand.
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| 8. | An internal helical gear and its pinion must be of the same hand.
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| 9. | Helical gears with low weight, accuracy and strength may be 3D printed.
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| 10. | A double helical gear can be thought of as two mirrored helical gears joined together.
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