Bearing and Housing Unit: SKF bearing units typically consist of a bearing, seal, lubricant and shaft locking mechanism. The units are preassembled and adjusted at the factory. These ready to mount units are available with either ball or roller bearings. In addition to standard all steel units, SKF has more focused standard products – which target a particular industry – like the food, beverage and pharmaceutical industries where, for example, special materials, lubricants, seals and housings are needed.
SKF ball bearings come in a wide variety of types, designs, series, sizes, variants and materials. Depending on the bearing design, SKF ball bearings are available in four performance classes.
Deep groove ball bearings are particularly versatile. They are simple in design, non-separable, suitable for high and very high speeds and are robust in operation, requiring little maintenance. Because deep groove ball bearings are the most widely used bearing type, they are available from SKF in many designs, variants and sizes.
In addition to the bearings presented in this section, deep groove ball bearings for special applications are shown under Engineered products. Deep groove ball bearings for special applications include:
- sensor bearing units
- High temperature bearings and bearing units
- bearings with Solid Oil
- INSOCOAT bearings
- hybrid bearings
- NoWear coated bearings
- polymer ball bearings
The purpose of a ball bearing is to reduce rotational friction and support radial and axial loads. It achieves this by using at least two races to contain the balls and transmit the loads through the balls. In most applications, one race is stationary and the other is attached to the rotating assembly (e.g., a hub or shaft). As one of the bearing races rotates it causes the balls to rotate as well. Because the balls are rolling they have a much lower coefficient of friction than if two flat surfaces were sliding against each other.
Ball bearings tend to have lower load capacity for their size than other kinds of rolling-element bearings due to the smaller contact area between the balls and races. However, they can tolerate some misalignment of the inner and outer races.