Schaeffler Group Greater China
CONTACT
Application Engineering Department Industrial
Tel. +86 21 39576000
Fax +86 21 39593210
Frequently Asked Questions About Bearings
Shoe mark on outer ring surface
Question:
There is shoe mark on the bearing ourter surface sometimes, it seems as seizure mark, does it influence bearing quality?
Answer:
This mark is from grinding process. When grinding raceway or bore, as a reference surface, outer surface is running contacting with support shoes forming this mark(as figure), It has no depth, just has visible bright or dull colour on the surface, all the measurements of this area are up to criterion. So it is no influence on useage.
Grinding machine headstock arrangement
(1) support shoes
Normally, an instruction sheet is attached in the package for this kind of bearing
