Recommended Thread Engagement

[MechDesign105]

Hi Guys,

I have read quite a few threads about thread engagement calc's on the site, but I would like to know if any of you know if ASME or any other standards recommend a certain thread engagement (ex. 1xd) for certain general situations.

- SS bolt in cast Aluminum blind tapped hole
- SS bolt in steel blind tapped hole

I am aware that every design is different, that the engagement depends on the actual forces in action, but I am simply looking for standard recommendations.

Thx!

 

[rmw]

If you read all the threads, you will have seen a good links that more than answer your question. You have to calculate the pull out strength of your base material to answer that question. There was a link in a thread that you will be able to find by searching that I saved on my "favorites" on my work computer (which unfortunately is not where I am now or I would post it.)

rmw

 

[MechDesign105]

Hey
I have read the threads and opened most of the links. Of course I can't be sure which one you're talking about.

I was more looking for a recommendation, and not calculations. I deal with many different designs that I purchase as part of my job, I go through design reviews and equipement testing. But i cannot do all the calculations. It is not by job. As such, I would like to be able to have a general rule of thumb, that would further be backed by the supplier calculations.

 

[rmw]

If I can think to do it I will check at work and post the link. It is not a calculator, but a link that gives the complete calculation process. I don't often get on Eng-tips during work hours for two reasons, first network police check for this type activity regularly and second I have lots of work to do and don't have time to come here unless it involves work. When I found the link I am referring to, it was work and the applicaton was like yours - real, SS bolts in a soft metal base.

rmw

 

[MechDesign105]

Thanks!

Do the calculations you refer to only assume tension loads or do they assume both shear and tension loads combined? Most calc's I've found on the website solely assume tension on bolt (and members).

Eng-tips is also used FOR work so you should technically be able to use this tool at work for your assignments...