×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • 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!
  • Students Click Here

*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.

Students Click Here

Jobs

Interference fit between a bin and a cylinder

Interference fit between a bin and a cylinder

Interference fit between a bin and a cylinder

(OP)
Hi all, I have here a little problem.

Is there any way to calculate the equivalent pressure on a pin caused by an interference fit with a cylinder?

Thanks.

RE: Interference fit between a bin and a cylinder

My terminolgoy for you pin inside cylinder would be shaft inside hub.  From Fielding's Handheld Caculator Programs for Rotating Equipment:

P = [<(delta*E )/ (2*rb*rc^2)>  -  <(3+nu)*w^2*rho/(8*g)>] * [rc^2-rb^2]

Symbols:
(1)    ra = shaft id (often 0
(2)    rb = shaft od and hub id (approx)
(3)    rc = hub od
(4)    delta = static interference
(5)    E,nu - material properties
(6)    w = angular speed.  
(7)    g = gravitation conversion

If w=0 (stationary), then this reduces to
P = [(delta*E )/ (2*rb*rc^2)] * [rc^2-rb^2]

=====================================
Eng-tips forums: The best place on the web for engineering discussions.

RE: Interference fit between a bin and a cylinder

(OP)
Should have state something at the start. The pin and and cylinder are made with different materials.

RE: Interference fit between a bin and a cylinder

I forgot to say that a, b, c are similar to ra, rb, rc above.

a = radius of inside of inner cylinder
b = raidus of outside of inner cylinder (same as inside of outer cylinder)
c = radius of outside of outer cyliner

=====================================
Eng-tips forums: The best place on the web for engineering discussions.

RE: Interference fit between a bin and a cylinder

(OP)
Thanks, this will really help!

RE: Interference fit between a bin and a cylinder

A question, asked frequently.

Cheers

Greg Locock

Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.

RE: Interference fit between a bin and a cylinder

Check out the forum at University of Tennessee, Martin. There is a website for Mechanical Engineering, the professor posted his notes on interference fits using Thick Wall Pressure Vessel Theory.  Appended to the notes is a physical example of the application.

There have been past threads on this subject,as GregLocock correctly pointed out.

Kenneth J Hueston, PEng
Principal
Sturni-Hueston Engineering Inc
Edmonton, Alberta Canada

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

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!


Resources