Page 26 - Rollingbearings

A.1 Bearing basics
Components and Rolling elements

materials The rolling elements (balls or rollers) transfer
the load between inner and outer rings.
Typically, the same steel is used for rolling
A typical rolling bearing consists of the elements as for bearing rings and washers.
following components (ig. 14): When required, rolling elements can be made
of ceramic material. Bearings containing
• an inner ring ceramic rolling elements are considered
• an outer ring hybrid bearings and are becoming more and
more common.
• balls or rollers, as rolling elements
Bearing basics • a cage

SKF supplies several bearing types capped
with a seal or shield on one or both sides.

illed with grease. They provide an economic
A.1 Bearings capped on both sides are factory-
and space-saving solution compared to
external sealing.

Bearing rings

The pressure at the rolling contact area and
the cyclic overrolling creates fatigue in the
bearing rings when the bearing is in opera-
tion. To cope with such fatigue, rings that are
made of steel must be hardened.
The standard steel for bearing rings and
washers is 100Cr6, a steel containing
approximately 1% carbon and 1,5%
chromium.
SKF bearing rings and washers are made
of steel in accordance with SKF speciications.
They cover all aspects that are relevant to
providing a long service life for the bearing.
Depending on speciic requirements, SKF
uses stainless steels or high-temperature
steels.
Fig. 14
Bearing components

Seal Rolling elements Inner ring
Outer ring Cage Seal

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