Long Addendum Gears

What are Long Addendum Gears?

• Addendum: This is the radial distance from the pitch circle to the top of the gear tooth. In other words, the addendum is how far the gear teeth extend above the pitch circle.
• Long Addendum: This means that these gears have teeth that extend farther from the pitch circle than traditional gears. This is done by augmenting the addendum.

Why were they invented?

• Improve fit: Long addendum gears reduce fit problems between gears. Longer teeth can contact more smoothly, reducing vibration and noise.
• Increase durability: Longer teeth distribute the load better, reducing wear and increasing the life of the gears.
• Allow greater precision: The increase in the addendum allows for greater precision in coupling, improving the overall performance of the machines.

Advantages and main applications

• Greater load capacity: The longer teeth have a greater contact surface, which allows them to withstand greater loads without deforming or breaking.
• Noise reduction: Because the contact between the teeth is more gradual, long addendum gears tend to run more quietly.
• Greater efficiency: Reduced backlash and vibration contributes to more efficient power transmission.
• Long life: Less tooth wear thanks to better load distribution extends the useful life of the gear.

• Automotive transmissions: Long addendum gears are often used in manual transmissions and transmissions for high-performance vehicles, where smooth, quiet operation is important.

• Industrial machines: Gears of this type are used in machines that require precision and robustness, such as machine tools and manufacturing plants.
• High-precision equipment: These are used in devices that require high precision and reliability, such as in control systems and industrial robots.
• Tools and equipment: Used in various tools and equipment to reduce noise and improve durability, such as in some hand tools and electric motors.