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Thin Section Ball Bearings

Thin Section SR Series Ball BearingsThin Section Ball Bearings were developed for applications where space limitations are of the utmost importance. As the name implies, the difference between the inside and outside diameters of the rings has been minimized or thinned out. Of course this comes at a price by compromising load capacities. However, these bearings can still accommodate a relatively light radial thrust or combined loads.

AST has nearly 300 different models of thin section ball bearings organized into the following numerical series:

  • SR Series – Inch dimensional series with bore sizes ranging from 3/8” to 1-5/8”
  • 6700 Series – Metric dimensional series for very limited space applications and very light loads
  • 6800 Series – Metric dimensional series for limited space applications and light loads
  • 63800 Series – A hybrid between the 6800 and 6900 Series with the load capacities of the 6800 series but the width of the 6900 series.
  • 6900 Series – Metric dimensional series for limited space applications and heavier loads

AST’s Thin Section Ball Bearings are produced open, shielded, sealed or with various combination of closures. ABEC-1 through ABEC-9 precision levels are also available on most models.  The standard material is 52100 Chrome steel but they are also available in stainless steel.  Also, virtually all metric series models are available with a flange for mounting if desired.

Torque Tube Bearings and Thinex Bearings

"Torque Tube" bearings and "Thinex" bearings are generic industry names for “Thin Section Ball Bearings”. While not required, Torque Tube bearings often have an extended inner ring to provide a stronger and stiffer bearing (minimizing torque) than its thinness would allow otherwise.

Generally, Thinex ball bearings are thinner given the same outside diameter than Torque Tube ball bearings (the term Thinex may have been derived from "thinest"); however, there is no standard definition for either in the bearing industry.

Whether called Torque Tube or Thinex ball bearings, Thin Section Ball Bearings are often used as specialized Instrument Ball Bearings where low friction and high accuracy are required, where space is at a premium, and where load support is less important than shaft location.

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.

Choose below to go to either our metric or inch series online catalog and product specifier for Thin Section Bearings including free CAD downloads.

Thin Section Ball Bearings - Inch "SR" Catalog & CAD LibraryThin Section Ball Bearings - Metric Series Catalog & CAD Library

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