BS4500 (ISO 1101) Fit Question H8/p7
BS4500 (ISO 1101) Fit Question H8/p7
(OP)
I have a very good article from the Copper Development Association regarding bronze bearing design. They recommend a press fit of H8/p7. For a 165.1mm (6.5in) nominal bearing OD I have calculated a hole limits of 165.163/165.1 and bearing limits of 165.183/165.143. If you take the smallest bearing diameter and largest hole then you end up with a clearance fit and not a press fit which won't work for a press fit bearing. Did I calculate the limits correctly or is there something not right in the guidelines from CDA?
These values are significantly different than the recommendation from a bearing supply catalog I have.
These values are significantly different than the recommendation from a bearing supply catalog I have.





RE: BS4500 (ISO 1101) Fit Question H8/p7
The figures for the fit you quote H8/p7 are correct.
What you have though is a transition fit which can either be
a clearence or interference.
What are the other figures you have and is it from the same bearing supplier that your getting your bearing from, if so I would go with those figures.
regards
desertfox
RE: BS4500 (ISO 1101) Fit Question H8/p7
RE: BS4500 (ISO 1101) Fit Question H8/p7
Is there any temperature involved with the assembly you might need to check stresses or whether you still have a intereference with a rise or fall in temp taking in to account housing material.
I think otherwise you are doing the right thing.
regards
desertfox
RE: BS4500 (ISO 1101) Fit Question H8/p7
Does this should right?
RE: BS4500 (ISO 1101) Fit Question H8/p7
RE: BS4500 (ISO 1101) Fit Question H8/p7
2. Find a table of ISO tolerances and see which one matches yours.