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Angular Contact SPB - Steel, PTFE Fabric, PTFE Plastic

The sphered sliding contact surfaces of angular contact spherical plain bearings are inclined at an angle to the bearing axis. They are therefore particularly suitable for carrying combined (radial and axial) loads. A single angular contact spherical plain bearing can only accept axial loads acting in one direction.

Under radial loads, a force acting in the axial direction is produced in the bearing which must always be opposed by an equal force acting in the opposite direction. Therefore, the bearings are usually adjusted against a second bearing.

Angular Contact SPB Bearings

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When two angular contact spherical plain bearings are arranged so that their sphere centers coincide, a clearance-free radial spherical plain bearing is obtained which can accommodate heavy radial loads as well as heavy axial loads in both directions. Angular contact spherical plain bearings are available with different sliding contact surface combinations, i.e. the sliding surfaces of inner and outer rings are made from different materials. There are two main groups:

  • Steel-on-steel angular contact spherical plain bearings
  • Maintenance-free angular contact spherical plain bearings

Steel-On-Steel Angular Contact Spherical Plain Bearings

The steel-on-steel angular contact spherical plain bearings supplied by AST are made of carbon chromium steel and are hardened and phosphated, it has characteristics of wear-resistance and wear-corrosion. The inner and outer rings sliding contact surface are treated with molybdenum disulphide. Bearings with this sliding contact surface combination require regular relubrication. To facilitate efficient lubrication, outer ring has an annular groove and two lubrication holes. The high strength of the sliding surfaces makes these bearings especially suitable for bearing arrangements where heavy loads of alternating direction, shock loads or heavy static loads have to be accommodated.

Maintenance-Free Angular Contact Spherical Plain Bearings

The maintenance-free angular contact spherical plain bearings supplied by AST have sliding contact surface combinations steel-on-PTFE fabric and steel-on-PTFE plastic, they have very low friction and can be operated without maintenance. Please note that any lubrication of the sliding contact surfaces will shorten bearing life. They are used for applications where long bearing lives are required without maintenance or where operating conditions, such as inadequate lubrication or the absence of lubrication, make the use of steel-on-steel bearing inadvisable. The maintenance-free bearings are primarily intended for applications where loads are heavy and have a constant direction.

AST has nearly 100 different angular contact spherical plain bearings products available which are broken down into the following series:

Series Characteristics
GACZ-S Series Steel-on-Steel, Angular Contact, Inch Dimensions
GAC-S Series Steel-on-Steel, Angular Contact, Metric Dimensions
GAC-T Series Steel-on-PTFE Fabric, Angular Contact, Metric Dimensions
GAC-N Series Steel-on-PTFE Plastic, Angular Contact, Metric Dimensions

AST Bearings is proudly presenting our new certificates for both the NJ and CA locations: AST Bearings’ ISO 9001:2015 Certificates

To learn more about what the ISO 9001 standard is, the differences between the 2015 and 2008 versions, and how AST verifies customer satisfaction: Learn About AST Bearings’ certification to ISO 9001:2015

Need Assistance Selecting the Proper Angular Contact - Steel, PTFE Fabric, PTFE Plastic?

If you need help in selecting the best products for your particular application, please remember that design engineering and application assistance are available from AST as part of our value-added services designed to make your job easier.

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