Rotorcraft Applications

Kaman Self-Lubricating Bearings for Rotorcraft
Longer life and lower maintenance for the most demanding applications

For decades, GRW (Germany), Kamatics (USA) and RWG (Germany) have been designing, testing, and manufacturing the highest performing bearings and flight critical parts in the industry, excelling under the most demanding conditions. Our proven innovations have kept us in front in our industry and helped clients keep out in front of theirs.

Kaman Rotorcraft Solutions

Flexible Drive Systems

Our proprietary KAflex® and Tufflex® coupling systems are frequently selected for critical rotating applications that demand a level of performance and safety that cannot be achieved with conventional greased coupling systems or standard flex-element couplings. Extreme torque, excessive angular misalignment, and high operating speeds are just a few of the reasons that customers turn to Kamatics Flexible Drive Systems.


  • No lubrication required

  • Superior misalignment capability

  • Integral fail-safe feature

  • High torque capacity
  • Rugged construction

  • Damage tolerant - repairable


  • Extended service life
  • Increased reliability
  • Ease of inspection
  • Cost effective


Kaman Flexible Driveshaft Systems

Self-Lubricating Bearings


Our self-lubricating liner systems are known throughout the rotorcraft industry for their improved performance, low wear rates, and low friction in even the most demanding applications. Whether in main rotor dampers and pitch links, tail rotors, passenger/cargo doors, landing gear, or other locations such as interior cabin components, our liner systems offer longer life and lower maintenance costs when exposed to high moisture levels, fluid/particulate contamination, reduced / elevated temperatures and high frequency oscillation. Every bearing solution can be tailored to your needs using our high performance machinable KAron and KAtherm liners or our industry-leading Fraslip fabric liners.

Our onsite, full service Test and Development Lab can support most development or qualification tests that may be needed for your bearing application. If your test requirements fall outside of our internal capabilities, we can utilize our network of trusted, third party test facilities to provide the performance data that you require.

Features & Benefits

  • All liner systems:
    • High dynamic and static operating load capacity
    • Low, consistent friction at ambient, reduced, and elevated temperatures
    • Perform well in high speed rotational and oscillatory applications
    • Capability with standard aerospace fluids
    • Perform well in blowing dust and sand
    • Can be applied to a variety of metallic and non-metallic substrates, including lightweight aluminum, glass or carbon composites, and titanium.
    • 100% maintenance free
    • Long life in a variety of dynamic conditions (anti-fretting, oscillations, rolling, or sliding)
    • Often designed to operate for the life of the aircraft or for increased flight hour inspection intervals compared to other bearing solutions
    • Some liners tested to the requirements of SAE AS81819 High Speed Self-Aligning Bearing Specification (see Technologies section or Engineering Resources for details on specific liner qualifications and capabilities)
    • Some liners tested and qualified to SAE AS81934, AS81820, AS8943, and AS85560 self-lubricating bearing standards (see Technologies section or Engineering Resources for details on specific liner qualifications and capabilities)
  • Machinable KAron and Katherm liner systems:
    • 100% bond, non-peelable
    • Can be applied to complex geometry
    • Liner thickness can be varied over a wide range based on application requirements
    • Allows for post-installation reaming or honing
Self-Lubricating Bearings

High-Precision Ball Bearings


To learn more about our Fixed Wing Aircraft capabilities, download these brochures:

Rotorcraft Capability Brochure

Kaman Specialty Bearings Company and Product Overview

Contact Kaman Specialty Bearings

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