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How is the allowable stress of a bolt determined?

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ScanHead

Mechanical
Joined
Mar 14, 2005
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How is the allowable stress of a bolt determined?
 
That's too general of a question. Are you a student?
 
No, just trying to brush up on bolt sizing. I'm using two M6 bolts (grade 10.9) for a bracket. I want to make sure the bracket will break before the bolts. What do I need to consider?
 
Consider:

geometry: bolt shank diameters (threaded, unthreaded, etc.)

forces: bolt pretension, applied external forces

material: allowable tension and shear stresses (see ISO 898-1)

This is a start...

Regards,

Cory

Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.
 
Hi Scanhead,
Also, check out Machinery's Handbook, 25th ed pp.1400-1416.
 
Yes Machiniery's Handbook is good. Referred to it today in fact.

Another excellent source is Tool and Manufacturing Engineering Handbook.

 
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