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SKF deep groove ball bearings for extreme temperatures

SKF deep groove ball bearings for extreme temperatures have the following design:

VA201 design for the most common applications

Bearings of the VA201 design are not sealed and have a pressed steel cage. They are lubricated with a polyalkylene glycol/graphite mixture which can be used at temperatures between –40 and +250 °C. At temperatures above +200 °C, dry lubrication pertains.

2Z/VA201 design with protective shields

The bearings of the 2Z/VA201 design are of the same design as the VA201 bearings but have protective shields on both sides to prevent the ingress of solid contaminants. Additionally, these bearings have twice the amount of the polyalkylene glycol/graphite mixture as the open VA201 design bearings.

Bearings of the 2Z/VA201 design are not recommended for mainly non-rotating applications.

2Z/VA208 design for high demands

Bearings of the 2Z/VA208 design have a segmented cage of graphite and can be used at temperatures between –150 and +350 °C. The segments separate the balls and also provide the necessary lubrication. The bearings are fitted with two shields, which axially guide the cage segments and prevent the entry of solid contaminants. The minute quantities of graphite powder released by the cage during rotation provide adequate lubrication for the bearing.

An additional advantage of these bearings is that they are environmentally friendly. Even at maximum temperatures, no dangerous gases or vapours are emitted.

2Z/VA228 design for top requirements

The 2Z/VA228 design bearings are the "top-of-the-range" among SKF products for high temperatures. They are fitted with a "coronet" cage of pure graphite, which opens up additional application areas for these high-temperature bearings. The coronet cage is a unique SKF development and permits operating speeds of up to 100 r/min.

For normal cases, the lubricant fill is between 25 and 35% of the free space in the bearing. 

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