What is permissable defect (gauge) area in a precision bearing bore?
What is permissable defect (gauge) area in a precision bearing bore?
(OP)
I have a part with a 4 inch precision bearing bore that has a defect in the bore due to an insert breaking, and causing a small gauge in the diameter. This means my ABEC 7 outer bearing race will not make 100% contact with the bore that it is pressed into, this bearing has small balls because the shaft is around 3 inches on the od. This is a special spindle application and will the shaft will be rotating a few thousand RPM. Does anyone have a specification of how much actual contact is needed for the bearing to run properly and not fail prematurly? Are there any articles that discuss this subject?





RE: What is permissable defect (gauge) area in a precision bearing bore?
Russell Giuliano
RE: What is permissable defect (gauge) area in a precision bearing bore?
grind/turn bore oversize in the id, to leave .001 min plate per surface. leave a step adjacent to the shoulder (length will depend on radii at corner, usually .015 max length.)
since chrome has difficulty building up in corners.
QQ-C-320 engineering chrome plate .004 min per surface in bore.
grind id to bore size required.
it will last longer than the parent material.
Good Luck
RE: What is permissable defect (gauge) area in a precision bearing bore?