Bearing Press Force Data Management Help Needed

[JeffZim]

We have manufactured a Bearing Press for a production part we are manufacturing for a transmission case. The assembly part print calls out the bearing press in force to be 675 lb. MIN to 1,800 lb. MAX. We currently begin capturing force data after we have engaged and entered the bore with the bearing by 3/16". We then take a force reading every .038 in. until we complete 10 readings. If any one of the ten samples is outside of the force range we fail the part. Our average reading of the 10 data points so far has always been within the acceptable range.
Is there a standard method or specification for determining how to test the production process for pressing a bearing into a part. We can't find anything defined by our customer, (Big Three). Would the current method be to rigid? We are scraping more parts than we anticipated.

 

[GregLocock]

If you go back to the function of the thing then the penultimate reading, before it hits home, is the most important. The others are interesting and tells you stuff about your process.

The average of all ten readings doesn't seem very helpful to me.

Having said that you have far more information than the original spec calls out.

Cheers

Greg Locock

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