Product Description
A double helical gear, also known as a herringbone gear, is an advanced type of gear that is a combination of two helical gears with opposing helix angles, placed side-by-side on a single hub. This unique "V" shaped design is engineered to overcome the axial thrust forces generated by single helical gears, making it a preferred choice for high-power, high-speed, and high-precision applications.
Key Features and Design
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Balanced Axial Thrust: The most significant feature is that the two opposing helical sections generate equal and opposite axial forces. This perfectly balances the thrust load, eliminating the need for thrust bearings and reducing stress on the shaft and gear housing.
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Smooth and Quiet Operation: Due to the gradual and continuous tooth engagement, double helical gears operate with significantly less noise and vibration compared to spur gears. The smooth meshing also helps to reduce shock loads on the gear teeth.
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High Load Capacity: The increased contact area and balanced load distribution across the gear teeth allow these gears to handle substantially higher loads and transmit more torque than a comparable-sized spur or single helical gear.
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Precision: These gears are manufactured to very tight tolerances and high-quality grades to ensure smooth meshing and high efficiency in power transmission.
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