LEWIS BENDING STRESS at the Teeth of a Gear in Just Over 12 Minutes!

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Күн бұрын

Lewis Form Factor,
Velocity Factor, Kv,
Lewis Bending Stress,
Bending Stress at the Teeth.
0:00 Failure of Gears
0:36 Lewis Bending Equation
3:06 Lewis Form Factor
3:29 Metric vs. English Units
4:36 Negligible Compression of Teeth
5:25 Correction Factors, K
5:55 Dynamic Factor, Kv
8:00 Stress Calculation Example
Previous Video: Worm Gear Forces and Speed Relations in Just Under 15 Minutes
• WORM GEARS - Forces an...
Example 1: • Lewis Bending Stress -...
Example 2: • Lewis Bending Stress -...
Next Video: Gear Pitting - Surface Contact Stress Fatigue Failure in Just Over 10 Minutes
• Gear PITTING - Surface...
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Пікірлер: 14

@mohamedshinaishin2822 3 жыл бұрын

You, without doubt, deserve a like

@EvolventDesign Жыл бұрын

Ratchet Gears do not rotate in their intended service purpose. These gears (and the associated pawls) are often on one or both sides of winch drums used for lifting with a coiled metal cable or rope. Their fluid analogy is a check valve, their electrical analogy is a diode. But it is true - gears that are normally used to transmit torque are under load while they are rotating. Excellent and clear presentation - SUB

@dr.ibrahimshaikh1325 3 жыл бұрын

I can't resist but subscribe....... very lucid explanation!!!

@LessBoringLectures 3 жыл бұрын

Thank you!

@impactodelsurenterprise2440 3 жыл бұрын

When using the material's yield strength to calculate the bending stress, do you use the surface yield strength or steel core yield strength value in the case of case hardened gear?

@dsaun777 2 жыл бұрын

What type of software do you use to make these drawings?

@abidmorshed5980 2 жыл бұрын

just what i need before exam

@aaronlevinthal6253 Жыл бұрын

Do you need to consider stress concentration factors Kt at the fillet of the root of the tooth?

@mateoichijo3408 4 ай бұрын

So let’s say I have a motor that is 2000 watts and I calculated that the maximum power that can be transmitted in my gear is 2500 Watts. Can I say that the safety factor is 2500/2000 = 1.25? Such a great video by the way! Thank you

@AlessandroEren 3 жыл бұрын

would be cool to have a video with all the K coefficients

@LessBoringLectures 3 жыл бұрын

Those will be coming in about 2 months.

@ericvilleneuve8396 Жыл бұрын

Usually Steels have similar tensile and compressive strength (or higher tensile strength) why do you assume they have lower tensile strength?

@AlessandroEren 3 жыл бұрын

why would I choose a spur gear instead of a helical one? Is it just about noise?

@LessBoringLectures 3 жыл бұрын

Angled teeth contact is more gradual, so helical are more silent. And they also last longer because of this. Either that, or they can handle higher loads. Of course, they generate thrust, which require thrust bearings. Also, as you can imagine, the manufacturing of helical gears is more expensive than regular spur gears.