Rotary shaftseals

Bearings without a retainer are called full complement bearings. This is because they have more balls which allows them to take heavier loads. They also cope with sudden shock loads (impact loads) as the increased number of balls distributes the load across the bearing raceway more effectively.

It is only possible to fit extra balls to this type of bearing thanks to a filling slot. This is created by machining a groove in the inner ring and outer ring. When these are matched up, it is possible to press extra balls into the bearing. Full complement bearings are less popular now as improvements in steel technology allow standard bearings to take much greater loads than before.

Shaftseals

Full complement bearings are only suitable for very light axial loads due risk of the balls being forced out of the filling slot. Speed ratings are much lower than those for bearings with a retainer as a full complement bearing experiences additional friction as a result of the balls rubbing against each other (ball to ball friction). An exception to this is a full complement bearing with ceramic (usually silicon nitride) balls thanks to the much lower friction coefficient of the ceramic material.

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Oilseals

Being the world’s only bearing company with seal manufacturing capabilities, SKF supplies a wide range of sealing solutions for rotating, reciprocating and static applications to industries worldwide. Innovative sealing solutions help customers to increase productivity and process reliability as well as to reduce Total Cost of Ownership.

Our determination to remain specialised gives us a high level of product knowledge, providing bearing and lubrication solutions to existing or potential customers, whether individuals or large corporations. We don’t just sell bearings, we help to solve your problems. - Chris Johnson, managing director of SMB Bearings.

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