Smart questions
Smart answers
Smart people
Join Eng-Tips Forums
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Member Login




Remember Me
Forgot Password?
Join Us!

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips now!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

Join Eng-Tips
*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.
Jobs from Indeed

Link To This Forum!

Partner Button
Add Stickiness To Your Site By Linking To This Professionally Managed Technical Forum.
Just copy and paste the
code below into your site.

johni357 (Aerospace) (OP)
16 Jan 08 14:45
Hi,

Trying to find some thread data (i.e. Maj. Dia, Pitch Dia. etc...etc..) for the following thread:

1.563 - 18 UNS - 3A

The machinist's handbook outlines some unified thread types but does not seem to include this UNS thread! unless I am looking in the wrong place! any help would be appreciated

Thanks
Timelord (Mechanical)
16 Jan 08 16:35
johni357,

My copy of Machinery's Handbook lists UNS threads as "selected combinations" of diameter and pitch.  UNS threads are listed in Table 14 labeled "Standard Series and Selected Combinations".  The catch is that the 1.563-18 thread is listed as UNEF (extra fine) not UNS.  the good news is the table gives you all the data you need for the 1-9/16-18 thread.

Timelord
Pressed (Mechanical)
28 Feb 08 15:49
You could search in google, or this forum:

http://www.eng-tips.com/viewthread.cfm?qid=92960&page=5

==========================================
Business Page   http://mech.e.tripod.com
------------------------------------------
Motorradtraum....www.tailofthedragon.com

MadMango (Mechanical)
28 Feb 08 16:12
Timelord, I think you meant Table 4.

"Art without engineering is dreaming; Engineering without art is calculating."

Have you read FAQ731-376: Eng-Tips.com Forum Policies to make the best use of Eng-Tips Forums?

Timelord (Mechanical)
28 Feb 08 16:40
MM,

My bad, Table 4 is correct. In the section called Screw Thread Systems.

Timelord
KENAT (Mechanical)
14 Mar 08 13:41
In UNS the S means special, so by definition it is not a standard size and is unlikely to be in a pre-calculated table.  This means you should calculate it from scratch using the definitions in ASME B1.1 or equivalent.

From what Timelord says your example may not actually be a special but a standard UNEF.

For true specials I find http://www.boltplanet.com useful but as it's free you need to verify it.  I've checked it a couple of times and found it correct but that's no guarantee.

The below is the results for your thread, the diameters are given at the bottom of the pop up.

http://www.boltplanet.com/Un/un.asp?selectsize=&txtthread_size=1.563&txtthreads_per_inch=18&txtseries_page=UNS&selectbolt_class=3A&selectnut_class=3B&txtext_tensile_strength=60000&txtint_tensile_strength=60000&txtext_desired_stress=100&txtnumber_of_starts=1&txtoutside_nut_diam=1.5&;txtnut_factor=0.2&txtlength_of_engagement=.43&txtstatic_load=.25&txtis_javascript_enabled=yes&;txtis_this_output=no&txtcalculation_number=5&txtvisitor_number=xxx&txtswitching=no&txtswitched=no&txtfirst_time=no&submit=Calculate+Now

KENAT, probably the least qualified checker you'll ever meet...

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close