REFLECTOR: Fw: Threaded hole strength

[Andrew Ellzey]

Are you taking in account that you would only have
3.25 threads with the 13 threads per inch in the 1/4
in thick aluminum plate, verses 5 threads with the 20
per inch? The thread depth for the 13 per inch would
have to be almost double to be equal the 20 per inch.
Food for thought. Have fun with the attached file.

Andy

--- Keith Hallsten <KeithHallsten at quiknet.com> wrote:

> Yes, the larger thread diameter gives more area in
> shear around the bolt,
> therefore the ½ “ bolt connection will take more
> load.  Also, the larger
> thread (13 per inch, rather than 20 per inch) also
> makes each thread a bit
> stronger.
> 
>  
> 
> Keith
> 
>  
> 
>  
> 
>   _____  
> 
> From: reflector-bounces at tvbf.org
> [mailto:reflector-bounces at tvbf.org] On
> Behalf Of HYTEC45 at aol.com
> Sent: Wednesday, July 20, 2005 1:01 PM
> To: reflector at tvbf.org
> Subject: Re: REFLECTOR: Fw: Threaded hole strength
> 
>  
> 
> 1/2-13.  Makeup torque is very important.
> 
>  
> 
>  
> 
> Original Message:
> 
>  
> 
>  What's stronger in tensile strength?
> 
>  
> 
>  1/4-20 thread tapped into a 1/4" aluminum plate?
> 
>  
> 
>  or
> 
>  
> 
>  1/2-13 thread tapped into a 1/4" aluminum plate?
> 
>  
> 
> > _______________________________________________
> To change your email address, visit
> http://www.tvbf.org/mailman/listinfo/reflector
> 
> Visit the gallery!  www.tvbf.org/gallery
> user:pw = tvbf:jamaicangoose
> Check new archives: www.tvbf.org/pipermail
> Check old archives:
http://www.tvbf.org/archives/velocity/maillist.html
-------------- next part --------------
A non-text attachment was scrubbed...
Name: Screw thread Calculations.pdf
Type: application/pdf
Size: 202498 bytes
Desc: 119936784-Screw thread Calculations.pdf
Url : http://www.tvbf.org/mailman/private/reflector/attachments/20050720/36a95d91/ScrewthreadCalculations-0001.pdf