Riverhawk Flexural Pivot Products

Flexural Pivot ProductsChoosing Riverhawk flexural pivots means you’re choosing top-notch, quality products from the industry-leader in frictionless pivot bearings. Riverhawk’s patented Free-Flex® Pivot offers superior operating characteristics with demonstrated performance and installed cost advantages over conventional bearings in many applications. Riverhawk’s quality products and service are all backed by the extensive knowledge and industry experience of our team of in-house engineers.

The Free-Flex® Pivot is a simply packaged, compact, and easily installed limited rotation bearing with predictable and repeatable performance. This patented pivot fills the need that standard lubricated bearings cannot meet, such as applications that do not permit lubrication yet demand precise positioning and require infinite life. It is a unique bearing concept for applications with limited angular travel of up to 60° (+/- 30°) rotation. They are a frictionless alternative to roller element bearings, knife edge bearings, jewel bearings and similar devices. Unlike traditional bearings, the mechanical properties of flexural pivots are predictable and do not degrade over time.


Riverhawk Flex Pivot Performance Characteristics

  • Frictionless
  • No Lubrication Required
  • Maintenance-Free
  • Infinite Cycle Life
  • Stiction-Free
  • Exceptional Repeatability
  • Predictable Performance
  • Low Hysteresis


We are proud to serve our customers with industry-leading, quality products and services, including:

  • Cantilevered (Single-Ended) Pivot Bearings
  • Double-Ended Pivot Bearings
  • Linear Flexure Bearings
  • Lamellar Pivots


Choosing the Right Flexural Pivot for your Needs

  1. Determine the preferred mounting arrangement so as to select a Cantilevered (Single-Ended) or Double Ended design.
  2. Identify the load carrying requirements.
  3. Determine if the loads are axial, radial, or combined. If the loads are combined please consult Riverhawk Engineering for assistance.
  4. Review the Pivot Characteristics Chart for pivot sizes capable of carrying the loads identified in Step 2.
  5. Select the most probable size using the loads and directions. Consider the torsional spring rate in your selection process.
  6. From the selected pivot part number, use the last three digits and the desired load direction to refer to the appropriate Life Cycle Curves.
  7. Using the X-Axis formula, compute the percentage of load and use it to determine the maximum deflection angle of the pivot for the desired life cycles.
  8. If that angle meets your requirements then the selection process is complete. If that angle does not meet your requirements, please refer back to Step 5 and repeat the process until all of your requirements have been met.