High temperature bearings and bearing units

SKF high temperature bearings are designed to deliver increased reliability, reduced complexity and decreased environmental impact in operating temperatures up to 350 °C (660 °F). Because SKF high temperature bearings correspond to the ISO dimensions of grease-lubricated bearings, production efficiencies and cost savings can be realized with a simple change to the SKF bearing solution.

SKF High temperature bearings provide:

  • reduced total operating cost through increased bearing service life
  • relubrication-free operation 1)
  • reduced machine complexity
  • reduced environmental impact
  • excellent performance in hot conditions, dry environments and low rotational speed applications
The environmental benefits of SKF high temperature bearings are so significant in many applications that they are included in the "SKF Beyond Zero" product portfolio.

Typical areas where SKF high temperature bearings are used include:

  • metals industry (cooling beds for steel plate)
  • food and beverage industry (continuous baking ovens, wafer baking ovens)
  • paint lines


SKF offers a wide range of high temperature bearings and units according to ISO standards and also a range of customized high temperature bearings.
Selection of an appropriate high temperature bearing is based on the bearing type and the operating conditions (primarily the temperature and speed) of the machinery.

The SKF core assortment of high temperature bearings and bearing units corresponding to ISO standards includes:

The assortment includes variants that contain food-grade lubricants registered by NSF as category H1 (lubricant acceptable with incidental food contact for use in and around food processing areas). The NSF registration confirms the lubricant fulfills the requirements listed in the US Food and Drug Administration's guidelines under 21 CFR section 178.3570.
Optimized internal radial clearance
SKF high temperature bearings are designed to maintain the radial clearance needed for high temperature operation and so will not seize, even when they cool rapidly, and therefore provide a long service life.
Lubrication solution

SKF high temperature bearing designs and variants incorporate various graphite-based lubrication solutions including:

  • lubricating paste composed of a polyalkylene glycol/graphite mixture
  • graphite cages (segmented or coronet)

For an overview of lubricant types, and other characteristics, for high temperature deep groove ball bearings and Y-bearings and Y-bearing units refer to table 1 and table 2.

During operation, the graphite maintains a very thin film on the bearing’s raceways and rolling elements to prevent metal-to-metal contact. Graphite ages at a much higher temperature than oil and grease, and therefore does not lose its lubricating properties in the high temperatures at which it is recommended for use, so the need for relubrication is eliminated.

With many variants, all surfaces of the bearing and, where applicable, shields and flingers, are manganese-phosphate coated to enhance adhesion of the lubricant to the metal and provide some protection against corrosion.
Ideal operating environment
Because high temperature bearings are supplied without preservative oils and must be used without grease or oil lubrication, the anti-corrosion property of the bearings is limited.

The most common sealing alternatives for high temperature bearings incorporate integrated or external shields or labyrinth seals. These arrangements have a rather low complexity and none of these arrangements are capable of keeping the bearing dry in a wet environment.

Therefore, the bearings should be used in a high temperature, dry environment.

Customized high temperature bearings

In addition to high temperature bearings corresponding to ISO standards, SKF offers a range of customized high temperature bearings.

These bearings are customized for use in equipment such as automatic wafer baking ovens in the food and beverage industry, in industrial furnaces and in chains. Contact SKF for more information.
  1. 1)With the exception of variant VA201 without shields, which does require relubrication.
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