Sealed SKF single row angular contact ball bearings have an attractive combination of design features such as low friction seals and the same load carrying capacity as open variants – features that enable new design solutions for many demanding applications.
Reduced need for maintenance
Sealed SKF single row angular contact ball bearings are ready-to-use units that are filled at the factory with the proper amount of high quality grease, under clean conditions. The cleanliness in a bearing is essential for long service life. Protection is particularly important during installation. By using sealed single row angular contact ball bearings instead of open bearings, solid contaminants are less likely to enter the bearing.
Sealed SKF single row angular contact ball bearings
more information: SKF angular contact ball bearing catalogue
Less frictional heat extends grease life
Non-contact SKF seals, which are standard on all sealed SKF single row angular contact ball bearings, generate less friction and frictional heat than contact seals or external lip seals. Lower operating temperatures influence grease life positive.
Reduced cost of ownership
Sealed SKF single row angular contact ball bearings are well suited for bearing arrangements where, due to limited space or for cost reasons, external seals are not practical. Their favourable design characteristics save space axially, enabling more compact machine designs.
When compared to open bearings, sealed SKF single row angular contact ball bearings can significantly reduce grease consumption. These bearings do not have a relubrication feature, so all costs associated with relubrication including the costs to purchase and dispose of used grease are eliminated. More importantly, these bearings can reduce the environmental impact that a machine will have over course of its life cycle.
Features of sealed SKF single row angular contact ball bearings
- Sealed SKF single row angular contact ball bearings are manufactured the same way as open bearings, to provide the same quality and service life you have come to expect from SKF. What makes Sealed SKF single row angular contact ball bearings stand above the competition is SKF’s unique seal design.
- Sealed SKF single row angular contact ball bearings are fitted with two non-contact seals as standard.There is an extremely narrow gap between the seal lip and its counterface on the inner ring, but due to the special seal lip design,grease ejection is minimized.
- Another advantage of this seal design is that there is no friction between the seal and its counterface on the inner ring. This reduces frictional heat,which extends the service life of the lubricant and does not affect the speed at which these bearings can operate.
Temperature range for RZ seals
The permissible operating temperature range for RZ seals is –40 to +100 °C (–40 to +212 °F). Temperatures up to 120 °C (248 °F) can be tolerated for brief periods.
Grease service life
Reducing the heat generated by a bearing has a significant impact on grease service life. As a rule of thumb, reducing the operating temperature by 15 °C doubles the service life of the grease. However, other factors that increase or decrease service life must be taken into consideration and include load, speed and misalignment.
Bearings are fitted on both sides with a seal made of an oil and wear-resistant NBR that is reinforced with a sheet steel insert.
Bearings are fitted with an injection moulded, ball centred cage made of a glass fibre reinforced polyamide.
Dimensions and tolerances
Sealed SKF single row angular contact ball bearings are dimensionally interchangeable with same size SKF open bearings and are manufactured with the same tolerances.
Load carrying capacity
Sealed SKF single row angular contact ball bearings have the same load carrying capacity and speed ratings as open SKF single row angular contact ball bearings
Clearance and preload
Standard sealed SKF single row angular contact ball bearings are supplied as non-matchable bearings for single use. Universally matchable bearings with three different clearance and preload classes are available on request.
Sealed SKF single row angular contact ball bearings are standard filled with a high performance polyurea grease (GXN). Non-standard greases and grease-fills are available on request.
The range of standard sealed SKF single rowangular contact ball bearings covers shaftdiameters 15 to 55 mm for the 72 series and 12 to 50 mm for the 73 series.