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Key Terminology

Key Terminology

(OP)
I've been asked to calculate the cracking area of a shaft key.  What is the cracking area?

I know the shear area is the length of the key times the width.

Thanks in advance

RE: Key Terminology

I'd ask for the sample that cracked.  

RE: Key Terminology

(OP)
The cracking area is one of the two failure modes of a key.  So I'm trying to calculate the area, asking for the sample isn't so easy when we don't have one.

I eventually came across a website that I was confident enough with to proceed.  

The cracking area is the length of the key times the height of the key engadged with the shaft.  Subtract out any fillets or radii that prevents the shaft and key from contacting.    

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