has addressed this problem

The Barden FAG angular contact ball clutch bearing segment solve sealing problems
How angular contact ball bearings sealed angular contact ball bearings are mainly used in machine tool spindle. In most cases, such a bearing outer ring lock port, which can not seal the annular groove thus formed, so that the spindle is used in many of the angular contact ball bearings can not be used for other hosts such as the other bearing that lubrication. If installing a set of auxiliary lubrication system, both to increase costs, but also to make the machine more complex structure.
The FAG Barden segment has addressed this problem. The advanced method is to use a new type of fluted ring embedded in the bearing, the bearing groove depth slightly shallower than the standard point and just fit in the intersection, fill in the gap left by the outer ring flange. Join this ring both sides stop leaking from the bearing grease, dirt can block the invasion from both sides of the bearing.From January 2009 to November 2010, they will be sold to a large number of counterfeit bearings Weihai several well-known local businesses, sales volume of about 30 million units, sales amount up to 370 million yuan. Since the bearing quality is not up to the production of these enterprises causing serious damage.
In view of the case involved a huge amount of bad influence, prosecutors investigate aspects of timely intervention to guide the public security organs on related personnel duties, remuneration, division of labor and other aspects of evidence promptly fixed. Prosecutor handling the case, after careful review, the suspect arraignment, asking relevant witnesses that five people involved act in full compliance with the production and sale of fake and shoddy products elements of the crime.