What are your thoughts on sugested bearing seat mounting tolerences?
What are your thoughts on sugested bearing seat mounting tolerences?
(OP)
I am interested in the your impressions/experience with the bearing manufactures recommend bearing seat machining tolerances like the ones from SKF referenced in the in this thread;
thread821-300114: bearing bore positional allignment
Approximately midway in the thread is a link to an SKF chart of recommended bearing mounting tolerances for different grades of bearings. These are fairly similar to all the different manufactures I have seen.
I realize your applications make a difference; we actually use the highest grades as I work with machine tools spindles and aerospace applications. The chart for those is linked at the very end of their page.
We often do not achieve these tolerances and I am just looking for other impressions from people with similar experiences.
Thanks,
Frank
thread821-300114: bearing bore positional allignment
Approximately midway in the thread is a link to an SKF chart of recommended bearing mounting tolerances for different grades of bearings. These are fairly similar to all the different manufactures I have seen.
I realize your applications make a difference; we actually use the highest grades as I work with machine tools spindles and aerospace applications. The chart for those is linked at the very end of their page.
We often do not achieve these tolerances and I am just looking for other impressions from people with similar experiences.
Thanks,
Frank





RE: What are your thoughts on sugested bearing seat mounting tolerences?
So, I have to ask why you're not meeting your own tolerances, and why you're presumably shipping such product?
Mike Halloran
Pembroke Pines, FL, USA
RE: What are your thoughts on sugested bearing seat mounting tolerences?
Reaching the full catalog speed rating (heat generation) and meeting Ford, GM and Chrysler's spindle vibration specs was hard enough with seats actually done to those specs.
RE: What are your thoughts on sugested bearing seat mounting tolerences?
Thanks,
Frank
RE: What are your thoughts on sugested bearing seat mounting tolerences?
For spindle bearings, no.
Mike Halloran
Pembroke Pines, FL, USA
RE: What are your thoughts on sugested bearing seat mounting tolerences?
RE: What are your thoughts on sugested bearing seat mounting tolerences?
Trouble = Noise, vibration, workpiece finish, operating temperature, bearing life, something else altogether?
How much out of tolerance was the eccentricity/co-linearity?
And, resulting axial runout of housing shoulders?
What size bearing?
Sometimes assembly methods can induce problems with well designed and manufactured parts. Although part of good design is easy assembly in my book.
RE: What are your thoughts on sugested bearing seat mounting tolerences?
RE: What are your thoughts on sugested bearing seat mounting tolerences?
That is my experiance, too. People can not believe we wanted those tolerances. I really had a feeling we just were out of date, our solution became buying our spindles from Setco.
Frank
RE: What are your thoughts on sugested bearing seat mounting tolerences?
Only in the bizarro world of supply chain professionals do cheap components that don't meet the specification compete with components that meet the specification but cost 'more'.
Mike Halloran
Pembroke Pines, FL, USA