Discussion Forum
 • Materials • Design Center • Processes • Units & Constants • Formulas • Mathematics
 Home Membership Magazines Forum Search Member Calculators
 Materials Design Processes Units Formulas Math
List Recent Topics | Start a New Topic

Message No. 10466, Started by ddelaiar on 01/30/03
 Press Fit Pressure So, I have a design that has a tube press fit inside a head.  The head will have a twisting motion, torque applied to it.  I'm trying to find out the max torque that can be applied that will not allow the head to spin free of the tube. I can find the following info: - COF between the tube and the head (depends on mat'l used) - Diameter of tube - Diameter of hole in head - Material Area that the head and tube have in contact What I'm drawing a blank on is how do I model the pressure (force that spread out over the area of contact) acting on the tube (or head) due to the press fit. Any ideas? Thanks, Dan
Reply | Start a New Topic | List Recent Topics

Follow-up Messages (17)
 Your welcome Dan, I think I enjoyed this one as much as you did. Carryin... No. 10541, Posted by neil moran on 02/08/03, 03:11 PST. It all makes sense now...thanks. By the way, I did pick up on your mista... No. 10537, Posted by ddelaiar on 02/07/03, 12:55 PST. The circumferential strains in the copper and steel must be the same becaus... No. 10536, Posted by neil moran on 02/07/03, 12:48 PST. I look at it this way, to apply the 120 ft-lbs of torque required for the p... No. 10535, Posted by rorschach on 02/07/03, 12:29 PST. hmmm...good deal. That's a bit more torque than I was anticipating, but th... No. 10533, Posted by ddelaiar on 02/07/03, 11:59 PST. as to your question as to how much torque a human hand can generate, I assu... No. 10532, Posted by rorschach on 02/07/03, 11:44 PST. Thanks for all the help Neil, I sat down with a large cup of coffe and s... No. 10531, Posted by ddelaiar on 02/07/03, 09:05 PST. Hi Dan, I think we all get in a bit over our head at times, you are not ... No. 10530, Posted by neil moran on 02/07/03, 08:55 PST. Neil, I'm also having trouble assuring myself of what to do once I get thi... No. 10529, Posted by ddelaiar on 02/07/03, 07:37 PST. Neil, I finally got around to trying to digest this. Everything seems to ... No. 10528, Posted by ddelaiar on 02/07/03, 06:35 PST. thanks for the response. The reason I went with a press fit is because the... No. 10516, Posted by ddelaiar on 02/05/03, 09:59 PST. Press fit could be a good solution , but you may take some things in consid... No. 10514, Posted by devitg on 02/05/03, 09:48 PST. It is a bit of a mouthfull, isn't it, but the maths is pretty straightforwa... No. 10485, Posted by neil moran on 02/01/03, 03:01 PST. wow neil, That was great. It looks like exactly what I'm looking for. Fo... No. 10481, Posted by ddelaiar on 01/31/03, 15:03 PST. Hi Dan, Sorry I think I misunderstood your problem, it is the pressure b... No. 10480, Posted by neil moran on 01/31/03, 14:23 PST. Neil, thanks for the reply. Perhaps the way I stated the problem was uncle... No. 10477, Posted by ddelaiar on 01/31/03, 10:24 PST. Hi Dan, Assuming that you can (or have already) calculated the pressure ... No. 10467, Posted by neil moran on 01/30/03, 14:08 PST.