Contamination Prevention for Plain Airframe Bearings (1001-958)
Navy SBIR FY2013.1

Sol No.: Navy SBIR FY2013.1
Topic No.: N131-016
Topic Title: Contamination Prevention for Plain Airframe Bearings (1001-958)
Proposal No.: N131-016-0117
CHELMSFORD, Massachusetts 01824
Contact: Tyson Lawrence
Phone: (978) 250-4200
Web Site:
Abstract: Liner wear in spherical bearings used in fixed wing and rotor craft can be significantly accelerated by liquid and solid contamination. Contamination is particularly problematic with oscillating loads. The proposed solution will prevent contamination of plain airframe bearings without significant additional friction or cost. The modification will not impact the bearing installation time, methods or required equipment. The solution will not significantly increase initial breakaway/running torque, temperature or maintenance cost. It is universal to all SAE Aerospace bearings (AS81819, AS81820, AS81935, AS82819, AS8942), all sizes and material options
Benefits: The ability to effectively protect bearings from debris can help minimize the chance of bearing failure and the associated hazards. The proposed system can be applied to stand-alone bearings or rod-end bearing assemblies of all sizes. Trial bearings will be those used on US Navy or Marine Corp fixed or rotating wing aircraft selected by the Navy. The system will work on continuous rotation dynamic components or intermittent rotation applications, such as landing gear, control surface attachments or other control actuators. The Triton contamination prevention system will not negatively impact bearing performance. Thus, bearing function will be maintained, while keeping predictable, consistent wear and current bearing life. The bearing will still meet the complete requirements of the associated AS standard, for example AS81819. The resulting contamination prevention system will save the Navy time and money and improve safety. The system will also benefit the commercial aircraft market through production and maintenance cost reductions and reduced risk of unexpected bearing failure enhancing both safety and reliability.