Simple Press-Fit Calculator



This gives you a way to test the impact of changing the amount of interference on the characteristics of a simple tube-in-tube press-fit connection. It allows for different materials to be evaluated, and alerts you to situations where you may be exceeding the Yield Strength, or Tensile Strength of the components.

Calculation Reference
Machine Design Juvinall
Scahum's Machine Design

19 Feb 2008
Last Modified
19 Feb 2008
File Size:
78.50 Kb
File Version:
File Author:
Andy Magee

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Comments: 2
MajorMagee 16 years ago
Well it must be a value between rh and rs. In the example it is equal to rs but I also entered perhaps the more obvious choice of (rh+rs)/2 and then the lower limiting value of rh.
Using the upper limit rs gives the highest contact pressure but using the lower limit of rh reduces by just 0.9%. Since interferences are always going to be small value maybe it does not matter too much what value is used?
MajorMagee 16 years ago
What is the "common radius"? I set this equal to the average of the inner radius of the outer tube and the outer radius of the inner tube but I don't think this is strictly correct. Shouldn't the spreadsheet calculate this value since it is one of the primary inputs to the results?