DIYbanter - View Single Post - Orientation of Timken Tapered Roller Bearing

wrote:
I just took the spindle apart on my Sheldon and noticed on the rear
bearing that there is a dimple on the face of the bearing race. I
have
heard that some precision bearings have a reference mark like this on
the bearing and it must be placed a certain way, either up or down.
Any
one have any suggestions on how it should go back in? I assume the
front bearing has the same mark but it is still pressed on the
spindle
and I caanot see the inner face of the race.

Thanks, Steve

The mark does matter.All precision spindle bearings are so marked and
the marks must be lined up even between front and rear bearings.There
should also be marks on the outer races which should be in line when
fitting the spindle into the housing.The marks are the high point of
the eccentricity in the bearings and if not lined up you may experience
vibration at the higher end of the revs.
My next job is spindle bearings on a Warner Swasey WSC12.I think they
are called 1SC`s over there.It has three angular contact bearings at
the front and one at the back and the book keeps reminding you to line
up the marks for the above reasons.
regards,Mark.