SKF deep groove ball bearings for high temperature applications correspond in design to standard single row deep groove ball bearings of the same size. They have no filling slots and can accommodate axial loads in addition to radial loads (Loads and selecting bearing size).

The entire surface of the bearing and shields are manganese phosphate coated to increase adhesion of the lubricant to the metal, improve the running-in properties and provide some protection against corrosion.

The radial internal clearance is a multiple of C5 to prevent the bearings from seizing, even when they cool rapidly.

Bearing benefits and features

The benefits and features of high temperature deep groove ball bearings include:

1. No need for relubrication
   All variants, except open bearings (without shields) with a stamped steel cage (VA201 design), are lubricated for the life of the bearing with graphite-based high temperature lubricants. Open VA201 bearings may require relubrication.
2. Simple replacement
   The boundary dimensions are the same as those of standard bearings.
3. Operating temperature up to 350 °C (660 °F)
   The internal radial clearance and the lubricant are optimized for operation at high temperatures.
4. Protection against solid contamination
   Shields (designation suffix 2Z) protect the bearing.
5. Improved running in
   The entire bearing surface is manganese phosphate coated.

Designs and variants

The SKF assortment of deep groove ball bearings for high temperature applications (fig. 2) provides solutions for various combinations of operating temperature and speed.

Table 1 lists the lubrication type, maximum operating temperature, limiting speed, maintenance requirements and all other primary characteristics of the variants within the assortment.

Sealing solutions

High temperature deep groove ball bearings can be protected from contamination by either integrated shields, external shields or a combination of both.

For high temperature bearings, metallic shields are the primary recommendation where a capping device with low complexity is required. The shields:

• Prevent the ingress of solid contaminants into the bearing
• Are non-contacting, therefore not generating friction or wear
• Are particularly well suited for high temperatures because of their material and design