Given the initial torque ( in lb ) imparted upon a UNC 4-40x 1/2 Type II Cross Recessed Pan Head machine screw and nut, how can I figure out the clamping force imposed upon the bolted joint? I have the equations to find the bolt preload given an initial torque, but not the clamping force. To add insult to injury, the screw/bolt system has several bushings in it. Is this something that I need to consider when determining the actual compressive force on the bolted joint? Lastly, I have heard mention of a book called the "bolting bible"; does anybody know of this book or where it can purchased?
Tek-Tips is the largest IT community on the Internet today!
Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!
-
Congratulations TugboatEng on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!
Clamping force on a bolted joint
- Thread starter s2btsull
- Start date
Check out <A HREF=" TARGET="_new"> <p>William H. Bernhart, P.E.<br><a href=mailto: > </a><br><a href= > </a><br>I work as a development engineer for AMP - Tyco Electronics located near Harrisburg, PA. I help design interconnections and electrical connectors for aerospace applications.
Guest
I work at Rotek Inc. in Aurora Ohio and this is<br>a common problem to large bearings which are bolted<br>in place. The clamping force, turning angle, torque<br>are related to the rated tensile strength of these<br>bolts posted by most bolt manufacturer's.<br>They are generally posted by the grade of bolt, material,<br>etc.
DonLeffingwellPE
Mechanical
I think you need to look at a good machine design textbook.<br><br>"Machine Design-Theory and Practice" Deutchman, Michels, and Wilson<br><br>"Mechanical Engineering Design" Shigley and Mitchell<br><br>"Design of Machine Elements" Spotts<br><br>Or you might try the Machinery Handbook by Industrial Press Inc<br><br>The clamping force will also depend on the materials being clamped in a bolted<br>connection.<br><br>Don Leffingwell<br><A HREF="mailto:dleffingwell@snet.net">dleffingwell@snet.net</A>
- Status
Similar threads
- Locked
- Question
- Question
