Description
This part is typically found in the inner mechanism of low-speed dental handpieces, particularly those associated with the Athena Champion brand
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It is a key component within a miniature planetary gear system inside the handpiece head or motor.
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This gear system is responsible for reducing the rotational speed from the motor to the handpiece's attachment (like a prophy angle or bur).
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By providing speed reduction, it simultaneously increases the torque delivered to the instrument, which is necessary for slow-speed applications like prophylaxis (polishing) or caries removal.
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Key Features
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It is the central gear of the planetary gear assembly.
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It is designed for precision meshing with the surrounding planet gears.
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Made from durable, high-wear-resistant metal to withstand the constant high-speed rotation and pressure of dental procedures.
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Replacement of this part is necessary when the handpiece experiences issues like grinding noises, lack of power, or non-smooth operation, which often indicates wear in the gear train.