Optimal Gear Teeth & Radius for Low Friction & Weight

Types_of_gearsIn summary, the optimal number of teeth for a gear to have low friction and weight impact would be between 20-30 for spur gears. The teeth should be as large as possible for strength. There is no standard table used in industries, as it depends on factors such as gear material and lubrication. Refer to the linked article for more information on different types of gears and their uses.
  • #1
Bern123
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Hi all, i have a doubt. How much teeth in relationship to his radius need to have a gear to be optimal? And, if i have 2 gears with same radius and same #of teeth, to have low friction and low negative effect from weight how much teeth they need to have and with which radius?

I know it's too generic question, it depends from material of the gear, lubrification type and shape of teeth. But is there a standard table used in industries with gear types and optimal applications?
 
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  • #2
There is no simple answer, but for spur gears you will need at least 20 teeth. The teeth should be as big as possible so they are strong. That sets a maximum number of teeth at about 30.
Spur gear teeth roll against each other, they do not slide, so there is low friction.
 
  • #3

1. What is the purpose of optimizing gear teeth and radius?

The purpose of optimizing gear teeth and radius is to reduce friction and weight in mechanical systems, which can improve efficiency and performance.

2. How do gear teeth and radius affect friction?

The shape and size of gear teeth and radius can impact the amount of contact and sliding between gears, which in turn affects the amount of friction generated.

3. What factors should be considered when determining the optimal gear teeth and radius?

Factors that should be considered include the type and speed of the gear, the load it will be subjected to, and the materials used for the gears.

4. Is there a specific formula for calculating the optimal gear teeth and radius?

There is no one-size-fits-all formula for determining the optimal gear teeth and radius. Engineers and scientists use a combination of mathematical models, simulations, and experimental data to find the best solution for a specific application.

5. Can optimizing gear teeth and radius also reduce weight?

Yes, optimizing gear teeth and radius can often result in weight reduction due to the use of smaller gears with fewer teeth, which can still achieve the same performance with less mass.

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